🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 34 (from laksa095)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa034.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://medlineplus.gov/arrhythmia.html\')), getAhrefsUnparsedNoserviceFromURL(\'https://medlineplus.gov/arrhythmia.html\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/medlineplus.gov\/arrhythmia.html","crawl_time":1775508847,"first_indexed_time":1468343682,"http_code":200,"src_unparsed":"gov,medlineplus!\/arrhythmia.html s443","src_root_hash":"14962761832352801234","history_drop_reason":null,"meta_title":"Arrhythmia | Irregular Heartbeat | MedlinePlus","meta_descriptions":["Arrhythmia, also called irregular heartbeat comes in different types. The most common is atrial fibrillation. Read about symptoms and treatment."],"attrs_boilerpipe_text":"Also called: Irregular heartbeat\nOn this page\nBasics\nSummary\nStart Here\nDiagnosis and Tests\nPrevention and Risk Factors\nTreatments and Therapies\nSee, Play and Learn\nVideos and Tutorials\nTest Your Knowledge\nSummary\nWhat is an arrhythmia?\nAn arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.\nWhen your heart beats faster than normal, it's called\ntachycardia\n.\nWhen your heart beats too slowly, it's called\nbradycardia\n.\nWhen the signal to beat comes too early, it's called a\npremature or extra heartbeat\n. It may feel like your heart skipped a beat.\nThere are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is\natrial fibrillation\n, which causes an irregular and fast heartbeat.\nSome arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a\nheart-healthy lifestyle\ncan help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias.\nWhat causes an arrhythmia?\nMany factors can affect your heart's rhythm, such as having had a\nheart attack\n,\nsmoking\n,\ncongenital heart defects\n, and stress. Other factors that could increase your risk for some types of arrhythmias could include if you:\nHave a family history of arrhythmias.\nHave certain health conditions, which can include\nheart and blood vessel diseases\n,\nlung diseases\n,\nkidney diseases\n,\nobesity\n, and\nsleep apnea\n.\nAre an older adult.\nHave had recent surgery for your heart, lungs, or throat.\nTake certain medicines for other health conditions.\nUse\nillegal drugs\n.\nIf you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia.\nWhat are the symptoms of an arrhythmia?\nYou may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during your\nroutine checkup\n. Symptoms of an arrhythmia can include:\nFast or slow heartbeat\nSkipping, fluttering, or pounding heartbeats\nChest pain\nor discomfort\nDizziness\nor fainting\nShortness of breath\nSweating\nTiredness or weakness\nSeek emergency medical care if you have chest pain, shortness of breath, or think you are having a heart attack.\nHow is an arrhythmia diagnosed?\nTo find out if you have an arrhythmia, your health care provider may order an\nelectrocardiogram (EKG).\nThis test records your heart's electrical activity and is the most common for finding an arrhythmia. Your provider may also:\nAsk about your medical history, including your symptoms and lifestyle habits.\nDo a physical exam, which includes checking your heartbeat and pulse.\nOrder blood tests and other\nheart tests\n.\nCheck your legs or feet for swelling.\nLook for signs of other health conditions that could cause an arrythmia, such as\nthyroid disease\n.\nWhat are the treatments for an arrhythmia?\nTreatment may include medicines, an implantable cardioverter-defibrillator\n(ICD) or pacemaker\n, or sometimes surgery. Your provider may also recommend avoiding activities that may trigger your arrhythmia.\nThe goal of treatment is to restore a normal heart rhythm. If not treated, arrhythmias can damage your heart, brain, and other organs and could be life-threatening.\nCan arrhythmias be prevented?\nTo help prevent an arrhythmia, your provider may suggest that you make heart-healthy lifestyle changes and treat health conditions that may cause arrhythmias.\nNIH: National Heart, Lung, and Blood Institute\nStart Here\nCategories of Arrhythmias\n(Texas Heart Institute)\nAlso in\nSpanish\nWhat Is an Arrhythmia?\n(American Heart Association)\nWhat Is an Arrhythmia?\n(National Heart, Lung, and Blood Institute)\nAlso in\nSpanish\nHeart Palpitations Quiz\n(Medical Encyclopedia)\nAlso in\nSpanish\nHeart Anatomy\n(Texas Heart Institute)\nAlso in\nSpanish\nHeart Information Center\n(Texas Heart Institute)\nAlso in\nSpanish\nHow the Heart Works\n(National Heart, Lung, and Blood Institute)\nAlso in\nSpanish\nArrhythmias\n(Medical Encyclopedia)\nAlso in\nSpanish\nAtrial fibrillation and atrial flutter\n(Medical Encyclopedia)\nAlso in\nSpanish\nCardiac ablation procedures\n(Medical Encyclopedia)\nAlso in\nSpanish\nEctopic heartbeat\n(Medical Encyclopedia)\nAlso in\nSpanish\nElectrocardiogram\n(Medical Encyclopedia)\nAlso in\nSpanish\nExercise stress test\n(Medical Encyclopedia)\nAlso in\nSpanish\nHeart palpitations\n(Medical Encyclopedia)\nAlso in\nSpanish\nHolter monitor (24h)\n(Medical Encyclopedia)\nAlso in\nSpanish\nParoxysmal supraventricular tachycardia (PSVT)\n(Medical Encyclopedia)\nAlso in\nSpanish\nVentricular tachycardia\n(Medical Encyclopedia)\nAlso in\nSpanish\nWolff-Parkinson-White syndrome (WPW)\n(Medical Encyclopedia)\nAlso in\nSpanish","attrs_markdown":"[Skip navigation](https:\/\/medlineplus.gov\/arrhythmia.html#start)\n\n![](https:\/\/medlineplus.gov\/uswds\/img\/us_flag_small.png)\n\nAn official website of the United States government\n\nHere’s how you know\n\nHere’s how you know\n\n![](https:\/\/medlineplus.gov\/uswds\/img\/icon-dot-gov.svg)\n\n**Official websites use .gov**  \nA **.gov** website belongs to an official government organization in the United States.\n\n![](https:\/\/medlineplus.gov\/uswds\/img\/icon-https.svg)\n\n**Secure .gov websites use HTTPS**  \nA **lock** ( Locked padlock icon) or **https:\/\/** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.\n\n[![National Institutes of Health](https:\/\/medlineplus.gov\/images\/nihlogo.png)](https:\/\/www.nih.gov\/ \"National Institutes of Health\")  [National Library of Medicine](https:\/\/www.nlm.nih.gov\/)\n\n[![MedlinePlus Trusted Health Information for You](https:\/\/medlineplus.gov\/images\/m_logo.png)](https:\/\/medlineplus.gov\/)\n\nMenu\n\n- [Health Topics](https:\/\/medlineplus.gov\/healthtopics.html)\n- [Drugs & Supplements](https:\/\/medlineplus.gov\/druginformation.html)\n- [Genetics](https:\/\/medlineplus.gov\/genetics\/)\n- [Medical Tests](https:\/\/medlineplus.gov\/lab-tests\/)\n- [Medical Encyclopedia](https:\/\/medlineplus.gov\/encyclopedia.html)\n- [About MedlinePlus](https:\/\/medlineplus.gov\/about\/)\n\nShow Search\n\n- [About MedlinePlus](https:\/\/medlineplus.gov\/about\/)\n- [What's New](https:\/\/medlineplus.gov\/whatsnew\/)\n- [Site Map](https:\/\/medlineplus.gov\/sitemap.html)\n- [Customer Support](https:\/\/support.nlm.nih.gov\/knowledgebase\/category\/?id=CAT-01231&category=medlineplus&from=https%3A\/\/medlineplus.gov\/arrhythmia.html)\n\n- [Health Topics](https:\/\/medlineplus.gov\/healthtopics.html)\n- [Drugs & Supplements](https:\/\/medlineplus.gov\/druginformation.html)\n- [Genetics](https:\/\/medlineplus.gov\/genetics\/)\n- [Medical Tests](https:\/\/medlineplus.gov\/lab-tests\/)\n- [Medical Encyclopedia](https:\/\/medlineplus.gov\/encyclopedia.html)\n\n[Español](https:\/\/medlineplus.gov\/spanish\/arrhythmia.html \"Español\")\n\nYou Are Here:\n\n[Home](https:\/\/medlineplus.gov\/) →\n\n[Health Topics](https:\/\/medlineplus.gov\/healthtopics.html) →\n\nArrhythmia\n\nURL of this page: https:\/\/medlineplus.gov\/arrhythmia.html\n\n# Arrhythmia\nAlso called: Irregular heartbeat\n\n[![Email this page to a friend](https:\/\/medlineplus.gov\/images\/i_share_email.png)](mailto:?subject=Arrhythmia%20%7C%20Irregular%20Heartbeat%20%7C%20MedlinePlusLock&body=I%20found%20this%20information%20on%20MedlinePlus.gov%20and%20I'd%20like%20to%20share%20it%20with%20you%3A%0A%0Ahttps%3A%2F%2Fmedlineplus.gov%2Farrhythmia.html%3Futm_source%3Demail%26utm_medium%3Dshare%26utm_campaign%3Dmplus_share%0A%0AMedlinePlus%20\\(https%3A%2F%2Fmedlineplus.gov\\)%3A%20Trusted%20Health%20Information%20for%20you%0A%0ATo%20get%20updates%20by%20email%20when%20new%20information%20becomes%20available%20on%20MedlinePlus%2C%20sign%20up%20at%20https%3A%2F%2Fmedlineplus.gov%2Flistserv.html. \"Email this page to a friend\") [![Print](https:\/\/medlineplus.gov\/images\/i_share_print.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"Print\") [![Facebook](https:\/\/medlineplus.gov\/images\/i_share_fb.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"Facebook\") [![X](https:\/\/medlineplus.gov\/images\/i_share_twitter.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"X\") [![Pinterest](https:\/\/medlineplus.gov\/images\/i_share_pinterest.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"Pinterest\") [![Subscribe to RSS](https:\/\/medlineplus.gov\/images\/i_share_rss.png)](https:\/\/medlineplus.gov\/feeds\/topics\/arrhythmia.xml \"Subscribe to RSS\")\n\nOn this page\n\n### Basics\n- [Summary](https:\/\/medlineplus.gov\/arrhythmia.html#summary \"Go to: Summary\")\n- [Start Here](https:\/\/medlineplus.gov\/arrhythmia.html#cat_51 \"Go to: Start Here\")\n- [Diagnosis and Tests](https:\/\/medlineplus.gov\/arrhythmia.html#cat_92 \"Go to: Diagnosis and Tests\")\n- [Prevention and Risk Factors](https:\/\/medlineplus.gov\/arrhythmia.html#cat_93 \"Go to: Prevention and Risk Factors\")\n- [Treatments and Therapies](https:\/\/medlineplus.gov\/arrhythmia.html#cat_78 \"Go to: Treatments and Therapies\")\n\n### Learn More\n- [Related Issues](https:\/\/medlineplus.gov\/arrhythmia.html#cat_47 \"Go to: Related Issues\")\n- [Specifics](https:\/\/medlineplus.gov\/arrhythmia.html#cat_42 \"Go to: Specifics\")\n- [Genetics](https:\/\/medlineplus.gov\/arrhythmia.html#cat_46 \"Go to: Genetics\")\n\n### See, Play and Learn\n- [Videos and Tutorials](https:\/\/medlineplus.gov\/arrhythmia.html#cat_94 \"Go to: Videos and Tutorials\")\n- [Test Your Knowledge](https:\/\/medlineplus.gov\/arrhythmia.html#cat_65 \"Go to: Test Your Knowledge\")\n\n### Research\n- [Clinical Trials](https:\/\/medlineplus.gov\/arrhythmia.html#cat_27 \"Go to: Clinical Trials\")\n- [Journal Articles](https:\/\/medlineplus.gov\/arrhythmia.html#cat_59 \"Go to: Journal Articles\")\n\n### Resources\n- [Reference Desk](https:\/\/medlineplus.gov\/arrhythmia.html#cat_82 \"Go to: Reference Desk\")\n- [Find an Expert](https:\/\/medlineplus.gov\/arrhythmia.html#cat_83 \"Go to: Find an Expert\")\n\n### For You\n- [Children](https:\/\/medlineplus.gov\/arrhythmia.html#cat_8 \"Go to: Children\")\n- [Patient Handouts](https:\/\/medlineplus.gov\/arrhythmia.html#cat_69 \"Go to: Patient Handouts\")\n\n## Summary\n### What is an arrhythmia?\nAn arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.\n\n- When your heart beats faster than normal, it's called **tachycardia**.\n- When your heart beats too slowly, it's called **bradycardia**.\n- When the signal to beat comes too early, it's called a **premature or extra heartbeat**. It may feel like your heart skipped a beat.\n\nThere are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is [atrial fibrillation](https:\/\/medlineplus.gov\/atrialfibrillation.html), which causes an irregular and fast heartbeat.\n\nSome arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a [heart-healthy lifestyle](https:\/\/medlineplus.gov\/howtopreventheartdisease.html) can help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias.\n\n### What causes an arrhythmia?\nMany factors can affect your heart's rhythm, such as having had a [heart attack](https:\/\/medlineplus.gov\/heartattack.html), [smoking](https:\/\/medlineplus.gov\/smoking.html), [congenital heart defects](https:\/\/medlineplus.gov\/congenitalheartdefects.html), and stress. Other factors that could increase your risk for some types of arrhythmias could include if you:\n\n- Have a family history of arrhythmias.\n- Have certain health conditions, which can include [heart and blood vessel diseases](https:\/\/medlineplus.gov\/heartdiseases.html), [lung diseases](https:\/\/medlineplus.gov\/copd.html), [kidney diseases](https:\/\/medlineplus.gov\/kidneydiseases.html), [obesity](https:\/\/medlineplus.gov\/obesity.html), and [sleep apnea](https:\/\/medlineplus.gov\/sleepapnea.html).\n- Are an older adult.\n- Have had recent surgery for your heart, lungs, or throat.\n- Take certain medicines for other health conditions.\n- Use [illegal drugs](https:\/\/medlineplus.gov\/druguseandaddiction.html).\n\nIf you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia.\n\n### What are the symptoms of an arrhythmia?\nYou may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during your [routine checkup](https:\/\/medlineplus.gov\/healthcheckup.html). Symptoms of an arrhythmia can include:\n\n- Fast or slow heartbeat\n- Skipping, fluttering, or pounding heartbeats\n- [Chest pain](https:\/\/medlineplus.gov\/chestpain.html) or discomfort\n- [Dizziness](https:\/\/medlineplus.gov\/dizzinessandvertigo.html) or fainting\n- [Shortness of breath](https:\/\/medlineplus.gov\/breathingproblems.html)\n- Sweating\n- Tiredness or weakness\n\nSeek emergency medical care if you have chest pain, shortness of breath, or think you are having a heart attack.\n\n### How is an arrhythmia diagnosed?\nTo find out if you have an arrhythmia, your health care provider may order an [electrocardiogram (EKG).](https:\/\/medlineplus.gov\/lab-tests\/electrocardiogram\/) This test records your heart's electrical activity and is the most common for finding an arrhythmia. Your provider may also:\n\n- Ask about your medical history, including your symptoms and lifestyle habits.\n- Do a physical exam, which includes checking your heartbeat and pulse.\n- Order blood tests and other [heart tests](https:\/\/medlineplus.gov\/hearthealthtests.html).\n- Check your legs or feet for swelling.\n- Look for signs of other health conditions that could cause an arrythmia, such as [thyroid disease](https:\/\/medlineplus.gov\/thyroiddiseases.html).\n### What are the treatments for an arrhythmia?\nTreatment may include medicines, an implantable cardioverter-defibrillator [(ICD) or pacemaker](https:\/\/medlineplus.gov\/pacemakersandimplantabledefibrillators.html), or sometimes surgery. Your provider may also recommend avoiding activities that may trigger your arrhythmia.\n\nThe goal of treatment is to restore a normal heart rhythm. If not treated, arrhythmias can damage your heart, brain, and other organs and could be life-threatening.\n\n### Can arrhythmias be prevented?\nTo help prevent an arrhythmia, your provider may suggest that you make heart-healthy lifestyle changes and treat health conditions that may cause arrhythmias.\n\nNIH: National Heart, Lung, and Blood Institute\n\n## Start Here\nCollapse Section\n\n- [Categories of Arrhythmias](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/categories-of-arrhythmias\/)   (Texas Heart Institute)   Also in [Spanish](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/categorias-de-arritmias\/)\n- [What Is an Arrhythmia?](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/about-arrhythmia)   (American Heart Association)\n- [What Is an Arrhythmia?](https:\/\/www.nhlbi.nih.gov\/health\/arrhythmias)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/arritmias)\n\n## Diagnosis and Tests\nExpand Section\n\n- [Common Tests for Arrhythmia](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/symptoms-diagnosis--monitoring-of-arrhythmia\/common-tests-for-arrhythmia)   (American Heart Association)\n- [Electrophysiology Studies](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/symptoms-diagnosis--monitoring-of-arrhythmia\/electrophysiology-studies)   (American Heart Association)\n- [Heart Health Tests: MedlinePlus Health Topic](https:\/\/medlineplus.gov\/hearthealthtests.html)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/hearthealthtests.html)\n- [Heart Tests](https:\/\/www.nhlbi.nih.gov\/health\/heart-tests)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/estudios-cardiacos)\n- [Skipped Beats](https:\/\/upbeat.org\/early-warning-signs\/skipped-beats)   (Heart Rhythm Society)\n- [Slow Heartbeat](https:\/\/upbeat.org\/early-warning-signs\/slow-heartbeat)   (Heart Rhythm Society)\n- [Syncope](https:\/\/www.ninds.nih.gov\/health-information\/disorders\/syncope)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Institute of Neurological Disorders and Stroke)\n- [Tilt Table Test](https:\/\/www.mayoclinic.org\/tests-procedures\/tilt-table-test\/about\/pac-20395124?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/tests-procedures\/tilt-table-test\/about\/pac-20395124?p=1)\n\n## Prevention and Risk Factors\nExpand Section\n\n- [Early Warning Signs](https:\/\/upbeat.org\/early-warning-signs)   (Heart Rhythm Society)\n- [Understand Your Risk for Arrhythmia](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/understand-your-risk-for-arrhythmia)   (American Heart Association)\n\n## Treatments and Therapies\nExpand Section\n\n- [Antiarrhythmics](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/antiarrhythmics\/)   (Texas Heart Institute)   Also in [Spanish](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/antiarritmicos\/)\n- [Heart Treatments](https:\/\/www.nhlbi.nih.gov\/health\/heart-treatments-procedures)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/tratamientos-cardiacos-procedimientos)\n- [Medications for Arrhythmia](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/prevention--treatment-of-arrhythmia\/medications-for-arrhythmia)   (American Heart Association)\n- [Pacemakers and Implantable Defibrillators: MedlinePlus Health Topic](https:\/\/medlineplus.gov\/pacemakersandimplantabledefibrillators.html)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/pacemakersandimplantabledefibrillators.html)\n- [Prevention and Treatment of Arrhythmia](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/prevention--treatment-of-arrhythmia)   (American Heart Association)\n- [What Are Defibrillators?](https:\/\/www.nhlbi.nih.gov\/health\/defibrillators)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/desfibriladores)\n\n## Related Issues\nExpand Section\n\n- [AED (Automated External Defibrillator) and PAD (Public Access Defibrillation) Programs](https:\/\/cpr.heart.org\/en\/-\/media\/CPR-Files\/Training-Programs\/AED-Implementation\/2023-updates\/KJ1683-AED-PAD-Program-QA.pdf?sc_lang=en)   (American Heart Association) - PDF\n- [All about Heart Rate](https:\/\/www.heart.org\/en\/health-topics\/high-blood-pressure\/the-facts-about-high-blood-pressure\/all-about-heart-rate-pulse)   (American Heart Association)\n- [Automated External Defibrillators: Do You Need an AED?](https:\/\/www.mayoclinic.org\/diseases-conditions\/heart-arrhythmia\/in-depth\/automated-external-defibrillators\/art-20043909?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/diseases-conditions\/heart-arrhythmia\/in-depth\/automated-external-defibrillators\/art-20043909?p=1)\n- [Substances (That May Affect the Heart's Electrical System)](https:\/\/upbeat.org\/lifestyle\/substances)   (Heart Rhythm Society)\n- [Sudden Death in Young People: Heart Problems Often Blamed](https:\/\/www.mayoclinic.org\/diseases-conditions\/sudden-cardiac-arrest\/in-depth\/sudden-death\/art-20047571?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/diseases-conditions\/sudden-cardiac-arrest\/in-depth\/sudden-death\/art-20047571?p=1)\n\n## Specifics\nExpand Section\n\n- [Atrial Flutter (AFL)](https:\/\/upbeat.org\/heart-rhythm-disorders\/atrial-flutter)  ![Video](https:\/\/medlineplus.gov\/images\/videocamera.gif)  (Heart Rhythm Society)\n- [Bradycardia](https:\/\/www.mayoclinic.org\/diseases-conditions\/bradycardia\/symptoms-causes\/syc-20355474?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/diseases-conditions\/bradycardia\/symptoms-causes\/syc-20355474?p=1)\n- [Brugada Syndrome](https:\/\/www.mayoclinic.org\/diseases-conditions\/brugada-syndrome\/symptoms-causes\/syc-20370489?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/diseases-conditions\/brugada-syndrome\/symptoms-causes\/syc-20370489?p=1)\n- [Bundle Branch Block](https:\/\/www.mayoclinic.org\/diseases-conditions\/bundle-branch-block\/symptoms-causes\/syc-20370514?p=1)   (Mayo Foundation for Medical Education and Research)\n- [Cardiac Arrest: MedlinePlus Health Topic](https:\/\/medlineplus.gov\/cardiacarrest.html)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/cardiacarrest.html)\n- [Conduction Disorders](https:\/\/www.nhlbi.nih.gov\/health\/conduction-disorders)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/trastornos-de-la-conduccion)\n- [Heart Rhythm Disorders](https:\/\/upbeat.org\/heart-rhythm-disorders)   (Heart Rhythm Society)\n- [Long QT Syndrome](https:\/\/www.nhlbi.nih.gov\/health\/long-qt-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/sindrome-de-qt-largo)\n- [Other Heart Rhythm Disorders](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/about-arrhythmia\/other-heart-rhythm-disorders)   (American Heart Association)\n- [Postural Tachycardia Syndrome (POTS)](https:\/\/www.ninds.nih.gov\/health-information\/disorders\/postural-tachycardia-syndrome-pots)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Institute of Neurological Disorders and Stroke)\n- [Premature Contractions -- PACs and PVCs](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/about-arrhythmia\/premature-contractions-pacs-and-pvcs)   (American Heart Association)\n- [Recognizing POTS: Learn to Spot This Mysterious Condition](https:\/\/newsinhealth.nih.gov\/2023\/09\/recognizing-pots)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Institutes of Health)   Also in [Spanish](https:\/\/salud.nih.gov\/recursos-de-salud\/nih-noticias-de-salud\/reconocer-el-pots)\n- [Sick Sinus Syndrome](https:\/\/www.mayoclinic.org\/diseases-conditions\/sick-sinus-syndrome\/symptoms-causes\/syc-20377554?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/diseases-conditions\/sick-sinus-syndrome\/symptoms-causes\/syc-20377554?p=1)\n- [Tachycardia](https:\/\/www.mayoclinic.org\/diseases-conditions\/tachycardia\/symptoms-causes\/syc-20355127?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/diseases-conditions\/tachycardia\/symptoms-causes\/syc-20355127?p=1)\n- [Tachycardia: Fast Heart Rate](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/about-arrhythmia\/tachycardia--fast-heart-rate)   (American Heart Association)\n- [Ventricular Fibrillation](https:\/\/www.mayoclinic.org\/diseases-conditions\/ventricular-fibrillation\/symptoms-causes\/syc-20364523?p=1)   (Mayo Foundation for Medical Education and Research)   Also in [Spanish](https:\/\/www.mayoclinic.org\/es\/diseases-conditions\/ventricular-fibrillation\/symptoms-causes\/syc-20364523?p=1)\n- [What Is Cardiac Arrest?](https:\/\/www.nhlbi.nih.gov\/health\/cardiac-arrest)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/paro-cardiaco)\n- [Wolff-Parkinson-White Syndrome](https:\/\/www.nhlbi.nih.gov\/health\/wolff-parkinson-white-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/sindrome-de-wolff-parkinson-white)\n\n## Genetics\nExpand Section\n\n- [Andersen-Tawil syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/andersen-tawil-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Ankyrin-B syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/ankyrin-b-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Brugada syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/brugada-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Catecholaminergic polymorphic ventricular tachycardia: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/catecholaminergic-polymorphic-ventricular-tachycardia)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Jervell and Lange-Nielsen syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/jervell-and-lange-nielsen-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Progressive familial heart block: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/progressive-familial-heart-block)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Romano-Ward syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/romano-ward-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Short QT syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/short-qt-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Sick sinus syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/sick-sinus-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Timothy syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/timothy-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n- [Wolff-Parkinson-White syndrome: MedlinePlus Genetics](https:\/\/medlineplus.gov\/genetics\/condition\/wolff-parkinson-white-syndrome)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Library of Medicine)\n\n## Videos and Tutorials\nExpand Section\n\n- [Arrhythmias](https:\/\/medlineplus.gov\/ency\/anatomyvideos\/000005.htm)  ![Video](https:\/\/medlineplus.gov\/images\/videocamera.gif)  (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/anatomyvideos\/000005.htm)\n- [Cardiac conduction system](https:\/\/medlineplus.gov\/ency\/anatomyvideos\/000021.htm)  ![Video](https:\/\/medlineplus.gov\/images\/videocamera.gif)  (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/anatomyvideos\/000021.htm)\n- [Heartbeat](https:\/\/medlineplus.gov\/ency\/anatomyvideos\/000067.htm)  ![Video](https:\/\/medlineplus.gov\/images\/videocamera.gif)  (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/anatomyvideos\/000067.htm)\n\n## Test Your Knowledge\nExpand Section\n\n- [Heart Palpitations Quiz](https:\/\/medlineplus.gov\/ency\/quiz\/003081_33.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/quiz\/003081_120.htm)\n\n## Clinical Trials\nExpand Section\n\n- [ClinicalTrials.gov: Arrhythmias, Cardiac](https:\/\/clinicaltrials.gov\/search?cond=%22Arrhythmias,+Cardiac%22&aggFilters=status:not%20rec)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Institutes of Health)\n- [ClinicalTrials.gov: Bradycardia](https:\/\/clinicaltrials.gov\/search?cond=%22Bradycardia%22&aggFilters=status:not%20rec)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Institutes of Health)\n- [ClinicalTrials.gov: Tachycardia](https:\/\/clinicaltrials.gov\/search?cond=%22Tachycardia%22&aggFilters=status:not%20rec)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Institutes of Health)\n\n## Journal Articles References and abstracts from MEDLINE\/PubMed (National Library of Medicine)\nExpand Section\n\n- [Article: Incidence, Predictors and Prognosis of Pacemaker Implantation after Transcatheter Aortic Valve...](https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/41773364)\n- [Article: Atrioventricular synchrony maintained by a dual-chamber leadless pacemaker in real-world conditions.](https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/41554110)\n- [Article: Preventive Effect of Shenfu Injection on Arrhythmia After Percutaneous Coronary Intervention...](https:\/\/www.ncbi.nlm.nih.gov\/pubmed\/41362880)\n- [Arrhythmia -- see more articles](https:\/\/pubmed.ncbi.nlm.nih.gov\/?term=%22Arrhythmias%2C+Cardiac%22%5Bmajr%3Anoexp%5D+AND+humans%5Bmh%5D+AND+english%5Bla%5D+AND+%22last+1+Year%22+%5Bedat%5D+AND+%28patient+education+handout%5Bpt%5D+OR+guideline%5Bpt%5D+OR+clinical+trial%5Bpt%5D%29++NOT+%28letter%5Bpt%5D+OR+case+reports%5Bpt%5D+OR+editorial%5Bpt%5D+OR+comment%5Bpt%5D%29+AND+free+full+text%5Bsb%5D+)\n\n## Reference Desk\nExpand Section\n\n- [Heart Anatomy](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/heart-anatomy\/)   (Texas Heart Institute)   Also in [Spanish](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/anatomia-del-corazon\/)\n- [Heart Information Center](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/)   (Texas Heart Institute)   Also in [Spanish](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/glosario-de-terminologia-cardiovascular\/)\n- [How the Heart Works](https:\/\/www.nhlbi.nih.gov\/health\/heart)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/corazon)\n\n## Find an Expert\nExpand Section\n\n- [American Heart Association](https:\/\/www.heart.org\/en\/)\n- [Find a Specialist](https:\/\/upbeat.org\/find-a-specialist)   (Heart Rhythm Society)\n- [National Heart, Lung, and Blood Institute](https:\/\/www.nhlbi.nih.gov\/)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)\n- [UpBeat.org](https:\/\/upbeat.org\/)   (Heart Rhythm Society)\n\n## Children\nExpand Section\n\n- [Arrhythmia (Abnormal Heartbeat)](https:\/\/kidshealth.org\/en\/parents\/arrhythmias.html)   (Nemours Foundation)   Also in [Spanish](https:\/\/kidshealth.org\/es\/parents\/arrhythmias.html)\n- [Heart Palpitations (For Parents)](https:\/\/kidshealth.org\/en\/parents\/heart-palpitations.html)   (Nemours Foundation)   Also in [Spanish](https:\/\/kidshealth.org\/es\/parents\/heart-palpitations.html)\n- [Treating Arrhythmias in Children](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/prevention--treatment-of-arrhythmia\/treating-arrhythmias-in-children)   (American Heart Association)\n\n## Patient Handouts\nExpand Section\n\n- [Arrhythmias](https:\/\/medlineplus.gov\/ency\/article\/001101.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/001101.htm)\n- [Atrial fibrillation and atrial flutter](https:\/\/medlineplus.gov\/ency\/article\/000184.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000184.htm)\n- [Cardiac ablation procedures](https:\/\/medlineplus.gov\/ency\/article\/007368.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/007368.htm)\n- [Ectopic heartbeat](https:\/\/medlineplus.gov\/ency\/article\/001100.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/001100.htm)\n- [Electrocardiogram](https:\/\/medlineplus.gov\/ency\/article\/003868.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003868.htm)\n- [Exercise stress test](https:\/\/medlineplus.gov\/ency\/article\/003878.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003878.htm)\n- [Heart palpitations](https:\/\/medlineplus.gov\/ency\/article\/003081.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003081.htm)\n- [Holter monitor (24h)](https:\/\/medlineplus.gov\/ency\/article\/003877.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003877.htm)\n- [Paroxysmal supraventricular tachycardia (PSVT)](https:\/\/medlineplus.gov\/ency\/article\/000183.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000183.htm)\n- [Ventricular tachycardia](https:\/\/medlineplus.gov\/ency\/article\/000187.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000187.htm)\n- [Wolff-Parkinson-White syndrome (WPW)](https:\/\/medlineplus.gov\/ency\/article\/000151.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000151.htm)\n\n## Topic Image\n![Arrhythmia](https:\/\/medlineplus.gov\/images\/Arrhythmia.jpg)\n\n## MEDICAL ENCYCLOPEDIA\n- [Arrhythmias](https:\/\/medlineplus.gov\/ency\/anatomyvideos\/000005.htm)\n- [Arrhythmias](https:\/\/medlineplus.gov\/ency\/article\/001101.htm)\n- [Atrial fibrillation and atrial flutter](https:\/\/medlineplus.gov\/ency\/article\/000184.htm)\n- [Cardiac ablation procedures](https:\/\/medlineplus.gov\/ency\/article\/007368.htm)\n- [Cardiac conduction system](https:\/\/medlineplus.gov\/ency\/anatomyvideos\/000021.htm)\n- [Cardiac event monitors](https:\/\/medlineplus.gov\/ency\/article\/007700.htm)\n- [Cardioversion](https:\/\/medlineplus.gov\/ency\/article\/007110.htm)\n- [Digitalis toxicity](https:\/\/medlineplus.gov\/ency\/article\/000165.htm)\n- [Ectopic heartbeat](https:\/\/medlineplus.gov\/ency\/article\/001100.htm)\n- [Heart block](https:\/\/medlineplus.gov\/ency\/article\/007658.htm)\n\n- [Heart palpitations](https:\/\/medlineplus.gov\/ency\/article\/003081.htm)\n- [Heartbeat](https:\/\/medlineplus.gov\/ency\/anatomyvideos\/000067.htm)\n- [Intracardiac electrophysiology study (EPS)](https:\/\/medlineplus.gov\/ency\/article\/003867.htm)\n- [Multifocal atrial tachycardia](https:\/\/medlineplus.gov\/ency\/article\/000186.htm)\n- [Paroxysmal supraventricular tachycardia (PSVT)](https:\/\/medlineplus.gov\/ency\/article\/000183.htm)\n- [Pulse](https:\/\/medlineplus.gov\/ency\/article\/003399.htm)\n- [Sick sinus syndrome](https:\/\/medlineplus.gov\/ency\/article\/000161.htm)\n- [Ventricular fibrillation](https:\/\/medlineplus.gov\/ency\/article\/007200.htm)\n- [Ventricular tachycardia](https:\/\/medlineplus.gov\/ency\/article\/000187.htm)\n- [Wolff-Parkinson-White syndrome (WPW)](https:\/\/medlineplus.gov\/ency\/article\/000151.htm)\n\nShow More Show Less\n\n## Related Health Topics\n- [Atrial Fibrillation](https:\/\/medlineplus.gov\/atrialfibrillation.html)\n- [Heart Health Tests](https:\/\/medlineplus.gov\/hearthealthtests.html)\n- [Pacemakers and Implantable Defibrillators](https:\/\/medlineplus.gov\/pacemakersandimplantabledefibrillators.html)\n\n## National Institutes of Health\nThe primary NIH organization for research on Arrhythmia is the [National Heart, Lung, and Blood Institute](http:\/\/www.nhlbi.nih.gov\/)\n\n## Other Languages\nFind [health information in languages other than English](https:\/\/medlineplus.gov\/languages\/arrhythmia.html) on *Arrhythmia*\n\n## Disclaimers\nMedlinePlus links to health information from the National Institutes of Health and other federal government agencies. MedlinePlus also links to health information from non-government Web sites. See our [disclaimer](https:\/\/medlineplus.gov\/disclaimers.html) about external links and our [quality guidelines](https:\/\/medlineplus.gov\/criteria.html).\n\n[![Email this page to a friend](https:\/\/medlineplus.gov\/images\/i_share_email.png)](mailto:?subject=Arrhythmia%20%7C%20Irregular%20Heartbeat%20%7C%20MedlinePlusLock&body=I%20found%20this%20information%20on%20MedlinePlus.gov%20and%20I'd%20like%20to%20share%20it%20with%20you%3A%0A%0Ahttps%3A%2F%2Fmedlineplus.gov%2Farrhythmia.html%3Futm_source%3Demail%26utm_medium%3Dshare%26utm_campaign%3Dmplus_share%0A%0AMedlinePlus%20\\(https%3A%2F%2Fmedlineplus.gov\\)%3A%20Trusted%20Health%20Information%20for%20you%0A%0ATo%20get%20updates%20by%20email%20when%20new%20information%20becomes%20available%20on%20MedlinePlus%2C%20sign%20up%20at%20https%3A%2F%2Fmedlineplus.gov%2Flistserv.html. \"Email this page to a friend\") [![Print](https:\/\/medlineplus.gov\/images\/i_share_print.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"Print\") [![Facebook](https:\/\/medlineplus.gov\/images\/i_share_fb.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"Facebook\") [![X](https:\/\/medlineplus.gov\/images\/i_share_twitter.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"X\") [![Pinterest](https:\/\/medlineplus.gov\/images\/i_share_pinterest.png)](https:\/\/medlineplus.gov\/arrhythmia.html \"Pinterest\") [![Subscribe to RSS](https:\/\/medlineplus.gov\/images\/i_share_rss.png)](https:\/\/medlineplus.gov\/feeds\/topics\/arrhythmia.xml \"Subscribe to RSS\")\n\nThe information on this site should not be used as a substitute for professional medical care or advice. Contact a health care provider if you have questions about your health.\n\nLearn how to cite this page\n\n## Was this page helpful?\nYes\n\nNo\n\nThank you for your feedback\\!\n\n- [About MedlinePlus](https:\/\/medlineplus.gov\/about\/)\n- [What's New](https:\/\/medlineplus.gov\/whatsnew\/)\n- [Site Map](https:\/\/medlineplus.gov\/sitemap.html)\n- [Customer Support](https:\/\/support.nlm.nih.gov\/knowledgebase\/category\/?id=CAT-01231&category=medlineplus&from=https%3A\/\/medlineplus.gov\/arrhythmia.html)\n\n- [Subscribe to RSS![RSS](https:\/\/medlineplus.gov\/images\/feed.png)](https:\/\/medlineplus.gov\/rss.html)\n- [Connect with NLM](https:\/\/www.nlm.nih.gov\/socialmedia\/index.html)\n\n- [NLM Web Policies](https:\/\/medlineplus.gov\/%20https:\/\/www.nlm.nih.gov\/web_policies.html)\n- [Copyright](https:\/\/medlineplus.gov\/about\/using\/usingcontent\/)\n- [Accessibility](https:\/\/medlineplus.gov\/accessibility.html)\n- [Guidelines for Links](https:\/\/medlineplus.gov\/about\/using\/criteria\/)\n- [Viewers & Players](https:\/\/medlineplus.gov\/plugins.html)\n- [HHS Vulnerability Disclosure](https:\/\/www.hhs.gov\/vulnerability-disclosure-policy\/index.html)\n- [MedlinePlus Connect for EHRs](https:\/\/medlineplus.gov\/medlineplus-connect\/)\n- [For Developers](https:\/\/medlineplus.gov\/about\/developers\/)\n\n[National Library of Medicine](https:\/\/www.nlm.nih.gov\/) 8600 Rockville Pike, Bethesda, MD 20894 [U.S. Department of Health and Human Services](https:\/\/www.hhs.gov\/) [National Institutes of Health](https:\/\/www.nih.gov\/)\n\nLast updated June 19, 2025\n\n[![Return to top](https:\/\/medlineplus.gov\/images\/return-top.png)](https:\/\/medlineplus.gov\/arrhythmia.html#top \"Return to top\")\n\nPrint Options\n\nX\n\nTopic Summary only\n\nFull topic including all links","attrs_readable_markdown":"Also called: Irregular heartbeat\n\nOn this page\n\n### Basics\n- [Summary](https:\/\/medlineplus.gov\/arrhythmia.html#summary \"Go to: Summary\")\n- [Start Here](https:\/\/medlineplus.gov\/arrhythmia.html#cat_51 \"Go to: Start Here\")\n- [Diagnosis and Tests](https:\/\/medlineplus.gov\/arrhythmia.html#cat_92 \"Go to: Diagnosis and Tests\")\n- [Prevention and Risk Factors](https:\/\/medlineplus.gov\/arrhythmia.html#cat_93 \"Go to: Prevention and Risk Factors\")\n- [Treatments and Therapies](https:\/\/medlineplus.gov\/arrhythmia.html#cat_78 \"Go to: Treatments and Therapies\")\n\n### See, Play and Learn\n- [Videos and Tutorials](https:\/\/medlineplus.gov\/arrhythmia.html#cat_94 \"Go to: Videos and Tutorials\")\n- [Test Your Knowledge](https:\/\/medlineplus.gov\/arrhythmia.html#cat_65 \"Go to: Test Your Knowledge\")\n\nSummary\n\n### What is an arrhythmia?\nAn arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.\n\n- When your heart beats faster than normal, it's called **tachycardia**.\n- When your heart beats too slowly, it's called **bradycardia**.\n- When the signal to beat comes too early, it's called a **premature or extra heartbeat**. It may feel like your heart skipped a beat.\n\nThere are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is [atrial fibrillation](https:\/\/medlineplus.gov\/atrialfibrillation.html), which causes an irregular and fast heartbeat.\n\nSome arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a [heart-healthy lifestyle](https:\/\/medlineplus.gov\/howtopreventheartdisease.html) can help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias.\n\n### What causes an arrhythmia?\nMany factors can affect your heart's rhythm, such as having had a [heart attack](https:\/\/medlineplus.gov\/heartattack.html), [smoking](https:\/\/medlineplus.gov\/smoking.html), [congenital heart defects](https:\/\/medlineplus.gov\/congenitalheartdefects.html), and stress. Other factors that could increase your risk for some types of arrhythmias could include if you:\n\n- Have a family history of arrhythmias.\n- Have certain health conditions, which can include [heart and blood vessel diseases](https:\/\/medlineplus.gov\/heartdiseases.html), [lung diseases](https:\/\/medlineplus.gov\/copd.html), [kidney diseases](https:\/\/medlineplus.gov\/kidneydiseases.html), [obesity](https:\/\/medlineplus.gov\/obesity.html), and [sleep apnea](https:\/\/medlineplus.gov\/sleepapnea.html).\n- Are an older adult.\n- Have had recent surgery for your heart, lungs, or throat.\n- Take certain medicines for other health conditions.\n- Use [illegal drugs](https:\/\/medlineplus.gov\/druguseandaddiction.html).\n\nIf you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia.\n\n### What are the symptoms of an arrhythmia?\nYou may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during your [routine checkup](https:\/\/medlineplus.gov\/healthcheckup.html). Symptoms of an arrhythmia can include:\n\n- Fast or slow heartbeat\n- Skipping, fluttering, or pounding heartbeats\n- [Chest pain](https:\/\/medlineplus.gov\/chestpain.html) or discomfort\n- [Dizziness](https:\/\/medlineplus.gov\/dizzinessandvertigo.html) or fainting\n- [Shortness of breath](https:\/\/medlineplus.gov\/breathingproblems.html)\n- Sweating\n- Tiredness or weakness\n\nSeek emergency medical care if you have chest pain, shortness of breath, or think you are having a heart attack.\n\n### How is an arrhythmia diagnosed?\nTo find out if you have an arrhythmia, your health care provider may order an [electrocardiogram (EKG).](https:\/\/medlineplus.gov\/lab-tests\/electrocardiogram\/) This test records your heart's electrical activity and is the most common for finding an arrhythmia. Your provider may also:\n\n- Ask about your medical history, including your symptoms and lifestyle habits.\n- Do a physical exam, which includes checking your heartbeat and pulse.\n- Order blood tests and other [heart tests](https:\/\/medlineplus.gov\/hearthealthtests.html).\n- Check your legs or feet for swelling.\n- Look for signs of other health conditions that could cause an arrythmia, such as [thyroid disease](https:\/\/medlineplus.gov\/thyroiddiseases.html).\n### What are the treatments for an arrhythmia?\nTreatment may include medicines, an implantable cardioverter-defibrillator [(ICD) or pacemaker](https:\/\/medlineplus.gov\/pacemakersandimplantabledefibrillators.html), or sometimes surgery. Your provider may also recommend avoiding activities that may trigger your arrhythmia.\n\nThe goal of treatment is to restore a normal heart rhythm. If not treated, arrhythmias can damage your heart, brain, and other organs and could be life-threatening.\n\n### Can arrhythmias be prevented?\nTo help prevent an arrhythmia, your provider may suggest that you make heart-healthy lifestyle changes and treat health conditions that may cause arrhythmias.\n\nNIH: National Heart, Lung, and Blood Institute\n\nStart Here\n\n- [Categories of Arrhythmias](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/categories-of-arrhythmias\/)   (Texas Heart Institute)   Also in [Spanish](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/categorias-de-arritmias\/)\n- [What Is an Arrhythmia?](https:\/\/www.heart.org\/en\/health-topics\/arrhythmia\/about-arrhythmia)   (American Heart Association)\n- [What Is an Arrhythmia?](https:\/\/www.nhlbi.nih.gov\/health\/arrhythmias)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/arritmias)\n\n- [Heart Palpitations Quiz](https:\/\/medlineplus.gov\/ency\/quiz\/003081_33.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/quiz\/003081_120.htm)\n\n- [Heart Anatomy](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/heart-anatomy\/)   (Texas Heart Institute)   Also in [Spanish](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/anatomia-del-corazon\/)\n- [Heart Information Center](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/)   (Texas Heart Institute)   Also in [Spanish](https:\/\/www.texasheart.org\/heart-health\/heart-information-center\/topics\/glosario-de-terminologia-cardiovascular\/)\n- [How the Heart Works](https:\/\/www.nhlbi.nih.gov\/health\/heart)  ![From the National Institutes of Health](https:\/\/medlineplus.gov\/images\/nih.png)  (National Heart, Lung, and Blood Institute)   Also in [Spanish](https:\/\/www.nhlbi.nih.gov\/es\/salud\/corazon)\n\n- [Arrhythmias](https:\/\/medlineplus.gov\/ency\/article\/001101.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/001101.htm)\n- [Atrial fibrillation and atrial flutter](https:\/\/medlineplus.gov\/ency\/article\/000184.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000184.htm)\n- [Cardiac ablation procedures](https:\/\/medlineplus.gov\/ency\/article\/007368.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/007368.htm)\n- [Ectopic heartbeat](https:\/\/medlineplus.gov\/ency\/article\/001100.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/001100.htm)\n- [Electrocardiogram](https:\/\/medlineplus.gov\/ency\/article\/003868.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003868.htm)\n- [Exercise stress test](https:\/\/medlineplus.gov\/ency\/article\/003878.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003878.htm)\n- [Heart palpitations](https:\/\/medlineplus.gov\/ency\/article\/003081.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003081.htm)\n- [Holter monitor (24h)](https:\/\/medlineplus.gov\/ency\/article\/003877.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/003877.htm)\n- [Paroxysmal supraventricular tachycardia (PSVT)](https:\/\/medlineplus.gov\/ency\/article\/000183.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000183.htm)\n- [Ventricular tachycardia](https:\/\/medlineplus.gov\/ency\/article\/000187.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000187.htm)\n- [Wolff-Parkinson-White syndrome (WPW)](https:\/\/medlineplus.gov\/ency\/article\/000151.htm)   (Medical Encyclopedia)   Also in [Spanish](https:\/\/medlineplus.gov\/spanish\/ency\/article\/000151.htm)","meta_canonical":null}

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URL	https://medlineplus.gov/arrhythmia.html
Last Crawled	2026-04-06 20:54:07 (2 hours ago)
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Meta Title	Arrhythmia \| Irregular Heartbeat \| MedlinePlus
Meta Description	Arrhythmia, also called irregular heartbeat comes in different types. The most common is atrial fibrillation. Read about symptoms and treatment.
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Boilerpipe Text	Also called: Irregular heartbeat On this page Basics Summary Start Here Diagnosis and Tests Prevention and Risk Factors Treatments and Therapies See, Play and Learn Videos and Tutorials Test Your Knowledge Summary What is an arrhythmia? An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias. When your heart beats faster than normal, it's called tachycardia . When your heart beats too slowly, it's called bradycardia . When the signal to beat comes too early, it's called a premature or extra heartbeat . It may feel like your heart skipped a beat. There are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is atrial fibrillation , which causes an irregular and fast heartbeat. Some arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a heart-healthy lifestyle can help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias. What causes an arrhythmia? Many factors can affect your heart's rhythm, such as having had a heart attack , smoking , congenital heart defects , and stress. Other factors that could increase your risk for some types of arrhythmias could include if you: Have a family history of arrhythmias. Have certain health conditions, which can include heart and blood vessel diseases , lung diseases , kidney diseases , obesity , and sleep apnea . Are an older adult. Have had recent surgery for your heart, lungs, or throat. Take certain medicines for other health conditions. Use illegal drugs . If you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia. What are the symptoms of an arrhythmia? You may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during your routine checkup . Symptoms of an arrhythmia can include: Fast or slow heartbeat Skipping, fluttering, or pounding heartbeats Chest pain or discomfort Dizziness or fainting Shortness of breath Sweating Tiredness or weakness Seek emergency medical care if you have chest pain, shortness of breath, or think you are having a heart attack. How is an arrhythmia diagnosed? To find out if you have an arrhythmia, your health care provider may order an electrocardiogram (EKG). This test records your heart's electrical activity and is the most common for finding an arrhythmia. Your provider may also: Ask about your medical history, including your symptoms and lifestyle habits. Do a physical exam, which includes checking your heartbeat and pulse. Order blood tests and other heart tests . Check your legs or feet for swelling. Look for signs of other health conditions that could cause an arrythmia, such as thyroid disease . What are the treatments for an arrhythmia? Treatment may include medicines, an implantable cardioverter-defibrillator (ICD) or pacemaker , or sometimes surgery. Your provider may also recommend avoiding activities that may trigger your arrhythmia. The goal of treatment is to restore a normal heart rhythm. If not treated, arrhythmias can damage your heart, brain, and other organs and could be life-threatening. Can arrhythmias be prevented? To help prevent an arrhythmia, your provider may suggest that you make heart-healthy lifestyle changes and treat health conditions that may cause arrhythmias. NIH: National Heart, Lung, and Blood Institute Start Here Categories of Arrhythmias (Texas Heart Institute) Also in Spanish What Is an Arrhythmia? (American Heart Association) What Is an Arrhythmia? (National Heart, Lung, and Blood Institute) Also in Spanish Heart Palpitations Quiz (Medical Encyclopedia) Also in Spanish Heart Anatomy (Texas Heart Institute) Also in Spanish Heart Information Center (Texas Heart Institute) Also in Spanish How the Heart Works (National Heart, Lung, and Blood Institute) Also in Spanish Arrhythmias (Medical Encyclopedia) Also in Spanish Atrial fibrillation and atrial flutter (Medical Encyclopedia) Also in Spanish Cardiac ablation procedures (Medical Encyclopedia) Also in Spanish Ectopic heartbeat (Medical Encyclopedia) Also in Spanish Electrocardiogram (Medical Encyclopedia) Also in Spanish Exercise stress test (Medical Encyclopedia) Also in Spanish Heart palpitations (Medical Encyclopedia) Also in Spanish Holter monitor (24h) (Medical Encyclopedia) Also in Spanish Paroxysmal supraventricular tachycardia (PSVT) (Medical Encyclopedia) Also in Spanish Ventricular tachycardia (Medical Encyclopedia) Also in Spanish Wolff-Parkinson-White syndrome (WPW) (Medical Encyclopedia) Also in Spanish
Markdown	[Skip navigation](https://medlineplus.gov/arrhythmia.html#start) ![](https://medlineplus.gov/uswds/img/us_flag_small.png) An official website of the United States government Here’s how you know Here’s how you know ![](https://medlineplus.gov/uswds/img/icon-dot-gov.svg) Official websites use .gov A .gov website belongs to an official government organization in the United States. ![](https://medlineplus.gov/uswds/img/icon-https.svg) Secure .gov websites use HTTPS A lock ( Locked padlock icon) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. [![National Institutes of Health](https://medlineplus.gov/images/nihlogo.png)](https://www.nih.gov/ "National Institutes of Health") [National Library of Medicine](https://www.nlm.nih.gov/) [![MedlinePlus Trusted Health Information for You](https://medlineplus.gov/images/m_logo.png)](https://medlineplus.gov/) Menu - [Health Topics](https://medlineplus.gov/healthtopics.html) - [Drugs & Supplements](https://medlineplus.gov/druginformation.html) - [Genetics](https://medlineplus.gov/genetics/) - [Medical Tests](https://medlineplus.gov/lab-tests/) - [Medical Encyclopedia](https://medlineplus.gov/encyclopedia.html) - [About MedlinePlus](https://medlineplus.gov/about/) Show Search - [About MedlinePlus](https://medlineplus.gov/about/) - [What's New](https://medlineplus.gov/whatsnew/) - [Site Map](https://medlineplus.gov/sitemap.html) - [Customer Support](https://support.nlm.nih.gov/knowledgebase/category/?id=CAT-01231&category=medlineplus&from=https%3A//medlineplus.gov/arrhythmia.html) - [Health Topics](https://medlineplus.gov/healthtopics.html) - [Drugs & Supplements](https://medlineplus.gov/druginformation.html) - [Genetics](https://medlineplus.gov/genetics/) - [Medical Tests](https://medlineplus.gov/lab-tests/) - [Medical Encyclopedia](https://medlineplus.gov/encyclopedia.html) [Español](https://medlineplus.gov/spanish/arrhythmia.html "Español") You Are Here: [Home](https://medlineplus.gov/) → [Health Topics](https://medlineplus.gov/healthtopics.html) → Arrhythmia URL of this page: https://medlineplus.gov/arrhythmia.html # Arrhythmia Also called: Irregular heartbeat [![Email this page to a friend](https://medlineplus.gov/images/i_share_email.png)](mailto:?subject=Arrhythmia%20%7C%20Irregular%20Heartbeat%20%7C%20MedlinePlusLock&body=I%20found%20this%20information%20on%20MedlinePlus.gov%20and%20I'd%20like%20to%20share%20it%20with%20you%3A%0A%0Ahttps%3A%2F%2Fmedlineplus.gov%2Farrhythmia.html%3Futm_source%3Demail%26utm_medium%3Dshare%26utm_campaign%3Dmplus_share%0A%0AMedlinePlus%20\(https%3A%2F%2Fmedlineplus.gov\)%3A%20Trusted%20Health%20Information%20for%20you%0A%0ATo%20get%20updates%20by%20email%20when%20new%20information%20becomes%20available%20on%20MedlinePlus%2C%20sign%20up%20at%20https%3A%2F%2Fmedlineplus.gov%2Flistserv.html. "Email this page to a friend") [![Print](https://medlineplus.gov/images/i_share_print.png)](https://medlineplus.gov/arrhythmia.html "Print") [![Facebook](https://medlineplus.gov/images/i_share_fb.png)](https://medlineplus.gov/arrhythmia.html "Facebook") [![X](https://medlineplus.gov/images/i_share_twitter.png)](https://medlineplus.gov/arrhythmia.html "X") [![Pinterest](https://medlineplus.gov/images/i_share_pinterest.png)](https://medlineplus.gov/arrhythmia.html "Pinterest") [![Subscribe to RSS](https://medlineplus.gov/images/i_share_rss.png)](https://medlineplus.gov/feeds/topics/arrhythmia.xml "Subscribe to RSS") On this page ### Basics - [Summary](https://medlineplus.gov/arrhythmia.html#summary "Go to: Summary") - [Start Here](https://medlineplus.gov/arrhythmia.html#cat_51 "Go to: Start Here") - [Diagnosis and Tests](https://medlineplus.gov/arrhythmia.html#cat_92 "Go to: Diagnosis and Tests") - [Prevention and Risk Factors](https://medlineplus.gov/arrhythmia.html#cat_93 "Go to: Prevention and Risk Factors") - [Treatments and Therapies](https://medlineplus.gov/arrhythmia.html#cat_78 "Go to: Treatments and Therapies") ### Learn More - [Related Issues](https://medlineplus.gov/arrhythmia.html#cat_47 "Go to: Related Issues") - [Specifics](https://medlineplus.gov/arrhythmia.html#cat_42 "Go to: Specifics") - [Genetics](https://medlineplus.gov/arrhythmia.html#cat_46 "Go to: Genetics") ### See, Play and Learn - [Videos and Tutorials](https://medlineplus.gov/arrhythmia.html#cat_94 "Go to: Videos and Tutorials") - [Test Your Knowledge](https://medlineplus.gov/arrhythmia.html#cat_65 "Go to: Test Your Knowledge") ### Research - [Clinical Trials](https://medlineplus.gov/arrhythmia.html#cat_27 "Go to: Clinical Trials") - [Journal Articles](https://medlineplus.gov/arrhythmia.html#cat_59 "Go to: Journal Articles") ### Resources - [Reference Desk](https://medlineplus.gov/arrhythmia.html#cat_82 "Go to: Reference Desk") - [Find an Expert](https://medlineplus.gov/arrhythmia.html#cat_83 "Go to: Find an Expert") ### For You - [Children](https://medlineplus.gov/arrhythmia.html#cat_8 "Go to: Children") - [Patient Handouts](https://medlineplus.gov/arrhythmia.html#cat_69 "Go to: Patient Handouts") ## Summary ### What is an arrhythmia? An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias. - When your heart beats faster than normal, it's called tachycardia. - When your heart beats too slowly, it's called bradycardia. - When the signal to beat comes too early, it's called a premature or extra heartbeat. It may feel like your heart skipped a beat. There are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is [atrial fibrillation](https://medlineplus.gov/atrialfibrillation.html), which causes an irregular and fast heartbeat. Some arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a [heart-healthy lifestyle](https://medlineplus.gov/howtopreventheartdisease.html) can help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias. ### What causes an arrhythmia? Many factors can affect your heart's rhythm, such as having had a [heart attack](https://medlineplus.gov/heartattack.html), [smoking](https://medlineplus.gov/smoking.html), [congenital heart defects](https://medlineplus.gov/congenitalheartdefects.html), and stress. Other factors that could increase your risk for some types of arrhythmias could include if you: - Have a family history of arrhythmias. - Have certain health conditions, which can include [heart and blood vessel diseases](https://medlineplus.gov/heartdiseases.html), [lung diseases](https://medlineplus.gov/copd.html), [kidney diseases](https://medlineplus.gov/kidneydiseases.html), [obesity](https://medlineplus.gov/obesity.html), and [sleep apnea](https://medlineplus.gov/sleepapnea.html). - Are an older adult. - Have had recent surgery for your heart, lungs, or throat. - Take certain medicines for other health conditions. - Use [illegal drugs](https://medlineplus.gov/druguseandaddiction.html). If you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia. ### What are the symptoms of an arrhythmia? You may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during your [routine checkup](https://medlineplus.gov/healthcheckup.html). Symptoms of an arrhythmia can include: - Fast or slow heartbeat - Skipping, fluttering, or pounding heartbeats - [Chest pain](https://medlineplus.gov/chestpain.html) or discomfort - [Dizziness](https://medlineplus.gov/dizzinessandvertigo.html) or fainting - [Shortness of breath](https://medlineplus.gov/breathingproblems.html) - Sweating - Tiredness or weakness Seek emergency medical care if you have chest pain, shortness of breath, or think you are having a heart attack. ### How is an arrhythmia diagnosed? To find out if you have an arrhythmia, your health care provider may order an [electrocardiogram (EKG).](https://medlineplus.gov/lab-tests/electrocardiogram/) This test records your heart's electrical activity and is the most common for finding an arrhythmia. Your provider may also: - Ask about your medical history, including your symptoms and lifestyle habits. - Do a physical exam, which includes checking your heartbeat and pulse. - Order blood tests and other [heart tests](https://medlineplus.gov/hearthealthtests.html). - Check your legs or feet for swelling. - Look for signs of other health conditions that could cause an arrythmia, such as [thyroid disease](https://medlineplus.gov/thyroiddiseases.html). ### What are the treatments for an arrhythmia? Treatment may include medicines, an implantable cardioverter-defibrillator [(ICD) or pacemaker](https://medlineplus.gov/pacemakersandimplantabledefibrillators.html), or sometimes surgery. Your provider may also recommend avoiding activities that may trigger your arrhythmia. The goal of treatment is to restore a normal heart rhythm. If not treated, arrhythmias can damage your heart, brain, and other organs and could be life-threatening. ### Can arrhythmias be prevented? To help prevent an arrhythmia, your provider may suggest that you make heart-healthy lifestyle changes and treat health conditions that may cause arrhythmias. NIH: National Heart, Lung, and Blood Institute ## Start Here Collapse Section - [Categories of Arrhythmias](https://www.texasheart.org/heart-health/heart-information-center/topics/categories-of-arrhythmias/) (Texas Heart Institute) Also in [Spanish](https://www.texasheart.org/heart-health/heart-information-center/topics/categorias-de-arritmias/) - [What Is an Arrhythmia?](https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia) (American Heart Association) - [What Is an Arrhythmia?](https://www.nhlbi.nih.gov/health/arrhythmias) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/arritmias) ## Diagnosis and Tests Expand Section - [Common Tests for Arrhythmia](https://www.heart.org/en/health-topics/arrhythmia/symptoms-diagnosis--monitoring-of-arrhythmia/common-tests-for-arrhythmia) (American Heart Association) - [Electrophysiology Studies](https://www.heart.org/en/health-topics/arrhythmia/symptoms-diagnosis--monitoring-of-arrhythmia/electrophysiology-studies) (American Heart Association) - [Heart Health Tests: MedlinePlus Health Topic](https://medlineplus.gov/hearthealthtests.html) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) Also in [Spanish](https://medlineplus.gov/spanish/hearthealthtests.html) - [Heart Tests](https://www.nhlbi.nih.gov/health/heart-tests) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/estudios-cardiacos) - [Skipped Beats](https://upbeat.org/early-warning-signs/skipped-beats) (Heart Rhythm Society) - [Slow Heartbeat](https://upbeat.org/early-warning-signs/slow-heartbeat) (Heart Rhythm Society) - [Syncope](https://www.ninds.nih.gov/health-information/disorders/syncope) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Institute of Neurological Disorders and Stroke) - [Tilt Table Test](https://www.mayoclinic.org/tests-procedures/tilt-table-test/about/pac-20395124?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/tests-procedures/tilt-table-test/about/pac-20395124?p=1) ## Prevention and Risk Factors Expand Section - [Early Warning Signs](https://upbeat.org/early-warning-signs) (Heart Rhythm Society) - [Understand Your Risk for Arrhythmia](https://www.heart.org/en/health-topics/arrhythmia/understand-your-risk-for-arrhythmia) (American Heart Association) ## Treatments and Therapies Expand Section - [Antiarrhythmics](https://www.texasheart.org/heart-health/heart-information-center/topics/antiarrhythmics/) (Texas Heart Institute) Also in [Spanish](https://www.texasheart.org/heart-health/heart-information-center/topics/antiarritmicos/) - [Heart Treatments](https://www.nhlbi.nih.gov/health/heart-treatments-procedures) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/tratamientos-cardiacos-procedimientos) - [Medications for Arrhythmia](https://www.heart.org/en/health-topics/arrhythmia/prevention--treatment-of-arrhythmia/medications-for-arrhythmia) (American Heart Association) - [Pacemakers and Implantable Defibrillators: MedlinePlus Health Topic](https://medlineplus.gov/pacemakersandimplantabledefibrillators.html) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) Also in [Spanish](https://medlineplus.gov/spanish/pacemakersandimplantabledefibrillators.html) - [Prevention and Treatment of Arrhythmia](https://www.heart.org/en/health-topics/arrhythmia/prevention--treatment-of-arrhythmia) (American Heart Association) - [What Are Defibrillators?](https://www.nhlbi.nih.gov/health/defibrillators) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/desfibriladores) ## Related Issues Expand Section - [AED (Automated External Defibrillator) and PAD (Public Access Defibrillation) Programs](https://cpr.heart.org/en/-/media/CPR-Files/Training-Programs/AED-Implementation/2023-updates/KJ1683-AED-PAD-Program-QA.pdf?sc_lang=en) (American Heart Association) - PDF - [All about Heart Rate](https://www.heart.org/en/health-topics/high-blood-pressure/the-facts-about-high-blood-pressure/all-about-heart-rate-pulse) (American Heart Association) - [Automated External Defibrillators: Do You Need an AED?](https://www.mayoclinic.org/diseases-conditions/heart-arrhythmia/in-depth/automated-external-defibrillators/art-20043909?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/diseases-conditions/heart-arrhythmia/in-depth/automated-external-defibrillators/art-20043909?p=1) - [Substances (That May Affect the Heart's Electrical System)](https://upbeat.org/lifestyle/substances) (Heart Rhythm Society) - [Sudden Death in Young People: Heart Problems Often Blamed](https://www.mayoclinic.org/diseases-conditions/sudden-cardiac-arrest/in-depth/sudden-death/art-20047571?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/diseases-conditions/sudden-cardiac-arrest/in-depth/sudden-death/art-20047571?p=1) ## Specifics Expand Section - [Atrial Flutter (AFL)](https://upbeat.org/heart-rhythm-disorders/atrial-flutter) ![Video](https://medlineplus.gov/images/videocamera.gif) (Heart Rhythm Society) - [Bradycardia](https://www.mayoclinic.org/diseases-conditions/bradycardia/symptoms-causes/syc-20355474?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/diseases-conditions/bradycardia/symptoms-causes/syc-20355474?p=1) - [Brugada Syndrome](https://www.mayoclinic.org/diseases-conditions/brugada-syndrome/symptoms-causes/syc-20370489?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/diseases-conditions/brugada-syndrome/symptoms-causes/syc-20370489?p=1) - [Bundle Branch Block](https://www.mayoclinic.org/diseases-conditions/bundle-branch-block/symptoms-causes/syc-20370514?p=1) (Mayo Foundation for Medical Education and Research) - [Cardiac Arrest: MedlinePlus Health Topic](https://medlineplus.gov/cardiacarrest.html) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) Also in [Spanish](https://medlineplus.gov/spanish/cardiacarrest.html) - [Conduction Disorders](https://www.nhlbi.nih.gov/health/conduction-disorders) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/trastornos-de-la-conduccion) - [Heart Rhythm Disorders](https://upbeat.org/heart-rhythm-disorders) (Heart Rhythm Society) - [Long QT Syndrome](https://www.nhlbi.nih.gov/health/long-qt-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/sindrome-de-qt-largo) - [Other Heart Rhythm Disorders](https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia/other-heart-rhythm-disorders) (American Heart Association) - [Postural Tachycardia Syndrome (POTS)](https://www.ninds.nih.gov/health-information/disorders/postural-tachycardia-syndrome-pots) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Institute of Neurological Disorders and Stroke) - [Premature Contractions -- PACs and PVCs](https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia/premature-contractions-pacs-and-pvcs) (American Heart Association) - [Recognizing POTS: Learn to Spot This Mysterious Condition](https://newsinhealth.nih.gov/2023/09/recognizing-pots) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Institutes of Health) Also in [Spanish](https://salud.nih.gov/recursos-de-salud/nih-noticias-de-salud/reconocer-el-pots) - [Sick Sinus Syndrome](https://www.mayoclinic.org/diseases-conditions/sick-sinus-syndrome/symptoms-causes/syc-20377554?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/diseases-conditions/sick-sinus-syndrome/symptoms-causes/syc-20377554?p=1) - [Tachycardia](https://www.mayoclinic.org/diseases-conditions/tachycardia/symptoms-causes/syc-20355127?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/diseases-conditions/tachycardia/symptoms-causes/syc-20355127?p=1) - [Tachycardia: Fast Heart Rate](https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia/tachycardia--fast-heart-rate) (American Heart Association) - [Ventricular Fibrillation](https://www.mayoclinic.org/diseases-conditions/ventricular-fibrillation/symptoms-causes/syc-20364523?p=1) (Mayo Foundation for Medical Education and Research) Also in [Spanish](https://www.mayoclinic.org/es/diseases-conditions/ventricular-fibrillation/symptoms-causes/syc-20364523?p=1) - [What Is Cardiac Arrest?](https://www.nhlbi.nih.gov/health/cardiac-arrest) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/paro-cardiaco) - [Wolff-Parkinson-White Syndrome](https://www.nhlbi.nih.gov/health/wolff-parkinson-white-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/sindrome-de-wolff-parkinson-white) ## Genetics Expand Section - [Andersen-Tawil syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/andersen-tawil-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Ankyrin-B syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/ankyrin-b-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Brugada syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/brugada-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Catecholaminergic polymorphic ventricular tachycardia: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/catecholaminergic-polymorphic-ventricular-tachycardia) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Jervell and Lange-Nielsen syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/jervell-and-lange-nielsen-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Progressive familial heart block: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/progressive-familial-heart-block) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Romano-Ward syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/romano-ward-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Short QT syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/short-qt-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Sick sinus syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/sick-sinus-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Timothy syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/timothy-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) - [Wolff-Parkinson-White syndrome: MedlinePlus Genetics](https://medlineplus.gov/genetics/condition/wolff-parkinson-white-syndrome) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Library of Medicine) ## Videos and Tutorials Expand Section - [Arrhythmias](https://medlineplus.gov/ency/anatomyvideos/000005.htm) ![Video](https://medlineplus.gov/images/videocamera.gif) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/anatomyvideos/000005.htm) - [Cardiac conduction system](https://medlineplus.gov/ency/anatomyvideos/000021.htm) ![Video](https://medlineplus.gov/images/videocamera.gif) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/anatomyvideos/000021.htm) - [Heartbeat](https://medlineplus.gov/ency/anatomyvideos/000067.htm) ![Video](https://medlineplus.gov/images/videocamera.gif) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/anatomyvideos/000067.htm) ## Test Your Knowledge Expand Section - [Heart Palpitations Quiz](https://medlineplus.gov/ency/quiz/003081_33.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/quiz/003081_120.htm) ## Clinical Trials Expand Section - [ClinicalTrials.gov: Arrhythmias, Cardiac](https://clinicaltrials.gov/search?cond=%22Arrhythmias,+Cardiac%22&aggFilters=status:not%20rec) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Institutes of Health) - [ClinicalTrials.gov: Bradycardia](https://clinicaltrials.gov/search?cond=%22Bradycardia%22&aggFilters=status:not%20rec) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Institutes of Health) - [ClinicalTrials.gov: Tachycardia](https://clinicaltrials.gov/search?cond=%22Tachycardia%22&aggFilters=status:not%20rec) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Institutes of Health) ## Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine) Expand Section - [Article: Incidence, Predictors and Prognosis of Pacemaker Implantation after Transcatheter Aortic Valve...](https://www.ncbi.nlm.nih.gov/pubmed/41773364) - [Article: Atrioventricular synchrony maintained by a dual-chamber leadless pacemaker in real-world conditions.](https://www.ncbi.nlm.nih.gov/pubmed/41554110) - [Article: Preventive Effect of Shenfu Injection on Arrhythmia After Percutaneous Coronary Intervention...](https://www.ncbi.nlm.nih.gov/pubmed/41362880) - [Arrhythmia -- see more articles](https://pubmed.ncbi.nlm.nih.gov/?term=%22Arrhythmias%2C+Cardiac%22%5Bmajr%3Anoexp%5D+AND+humans%5Bmh%5D+AND+english%5Bla%5D+AND+%22last+1+Year%22+%5Bedat%5D+AND+%28patient+education+handout%5Bpt%5D+OR+guideline%5Bpt%5D+OR+clinical+trial%5Bpt%5D%29++NOT+%28letter%5Bpt%5D+OR+case+reports%5Bpt%5D+OR+editorial%5Bpt%5D+OR+comment%5Bpt%5D%29+AND+free+full+text%5Bsb%5D+) ## Reference Desk Expand Section - [Heart Anatomy](https://www.texasheart.org/heart-health/heart-information-center/topics/heart-anatomy/) (Texas Heart Institute) Also in [Spanish](https://www.texasheart.org/heart-health/heart-information-center/topics/anatomia-del-corazon/) - [Heart Information Center](https://www.texasheart.org/heart-health/heart-information-center/) (Texas Heart Institute) Also in [Spanish](https://www.texasheart.org/heart-health/heart-information-center/topics/glosario-de-terminologia-cardiovascular/) - [How the Heart Works](https://www.nhlbi.nih.gov/health/heart) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/corazon) ## Find an Expert Expand Section - [American Heart Association](https://www.heart.org/en/) - [Find a Specialist](https://upbeat.org/find-a-specialist) (Heart Rhythm Society) - [National Heart, Lung, and Blood Institute](https://www.nhlbi.nih.gov/) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) - [UpBeat.org](https://upbeat.org/) (Heart Rhythm Society) ## Children Expand Section - [Arrhythmia (Abnormal Heartbeat)](https://kidshealth.org/en/parents/arrhythmias.html) (Nemours Foundation) Also in [Spanish](https://kidshealth.org/es/parents/arrhythmias.html) - [Heart Palpitations (For Parents)](https://kidshealth.org/en/parents/heart-palpitations.html) (Nemours Foundation) Also in [Spanish](https://kidshealth.org/es/parents/heart-palpitations.html) - [Treating Arrhythmias in Children](https://www.heart.org/en/health-topics/arrhythmia/prevention--treatment-of-arrhythmia/treating-arrhythmias-in-children) (American Heart Association) ## Patient Handouts Expand Section - [Arrhythmias](https://medlineplus.gov/ency/article/001101.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/001101.htm) - [Atrial fibrillation and atrial flutter](https://medlineplus.gov/ency/article/000184.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000184.htm) - [Cardiac ablation procedures](https://medlineplus.gov/ency/article/007368.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/007368.htm) - [Ectopic heartbeat](https://medlineplus.gov/ency/article/001100.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/001100.htm) - [Electrocardiogram](https://medlineplus.gov/ency/article/003868.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003868.htm) - [Exercise stress test](https://medlineplus.gov/ency/article/003878.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003878.htm) - [Heart palpitations](https://medlineplus.gov/ency/article/003081.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003081.htm) - [Holter monitor (24h)](https://medlineplus.gov/ency/article/003877.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003877.htm) - [Paroxysmal supraventricular tachycardia (PSVT)](https://medlineplus.gov/ency/article/000183.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000183.htm) - [Ventricular tachycardia](https://medlineplus.gov/ency/article/000187.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000187.htm) - [Wolff-Parkinson-White syndrome (WPW)](https://medlineplus.gov/ency/article/000151.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000151.htm) ## Topic Image ![Arrhythmia](https://medlineplus.gov/images/Arrhythmia.jpg) ## MEDICAL ENCYCLOPEDIA - [Arrhythmias](https://medlineplus.gov/ency/anatomyvideos/000005.htm) - [Arrhythmias](https://medlineplus.gov/ency/article/001101.htm) - [Atrial fibrillation and atrial flutter](https://medlineplus.gov/ency/article/000184.htm) - [Cardiac ablation procedures](https://medlineplus.gov/ency/article/007368.htm) - [Cardiac conduction system](https://medlineplus.gov/ency/anatomyvideos/000021.htm) - [Cardiac event monitors](https://medlineplus.gov/ency/article/007700.htm) - [Cardioversion](https://medlineplus.gov/ency/article/007110.htm) - [Digitalis toxicity](https://medlineplus.gov/ency/article/000165.htm) - [Ectopic heartbeat](https://medlineplus.gov/ency/article/001100.htm) - [Heart block](https://medlineplus.gov/ency/article/007658.htm) - [Heart palpitations](https://medlineplus.gov/ency/article/003081.htm) - [Heartbeat](https://medlineplus.gov/ency/anatomyvideos/000067.htm) - [Intracardiac electrophysiology study (EPS)](https://medlineplus.gov/ency/article/003867.htm) - [Multifocal atrial tachycardia](https://medlineplus.gov/ency/article/000186.htm) - [Paroxysmal supraventricular tachycardia (PSVT)](https://medlineplus.gov/ency/article/000183.htm) - [Pulse](https://medlineplus.gov/ency/article/003399.htm) - [Sick sinus syndrome](https://medlineplus.gov/ency/article/000161.htm) - [Ventricular fibrillation](https://medlineplus.gov/ency/article/007200.htm) - [Ventricular tachycardia](https://medlineplus.gov/ency/article/000187.htm) - [Wolff-Parkinson-White syndrome (WPW)](https://medlineplus.gov/ency/article/000151.htm) Show More Show Less ## Related Health Topics - [Atrial Fibrillation](https://medlineplus.gov/atrialfibrillation.html) - [Heart Health Tests](https://medlineplus.gov/hearthealthtests.html) - [Pacemakers and Implantable Defibrillators](https://medlineplus.gov/pacemakersandimplantabledefibrillators.html) ## National Institutes of Health The primary NIH organization for research on Arrhythmia is the [National Heart, Lung, and Blood Institute](http://www.nhlbi.nih.gov/) ## Other Languages Find [health information in languages other than English](https://medlineplus.gov/languages/arrhythmia.html) on Arrhythmia ## Disclaimers MedlinePlus links to health information from the National Institutes of Health and other federal government agencies. 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Readable Markdown	Also called: Irregular heartbeat On this page ### Basics - [Summary](https://medlineplus.gov/arrhythmia.html#summary "Go to: Summary") - [Start Here](https://medlineplus.gov/arrhythmia.html#cat_51 "Go to: Start Here") - [Diagnosis and Tests](https://medlineplus.gov/arrhythmia.html#cat_92 "Go to: Diagnosis and Tests") - [Prevention and Risk Factors](https://medlineplus.gov/arrhythmia.html#cat_93 "Go to: Prevention and Risk Factors") - [Treatments and Therapies](https://medlineplus.gov/arrhythmia.html#cat_78 "Go to: Treatments and Therapies") ### See, Play and Learn - [Videos and Tutorials](https://medlineplus.gov/arrhythmia.html#cat_94 "Go to: Videos and Tutorials") - [Test Your Knowledge](https://medlineplus.gov/arrhythmia.html#cat_65 "Go to: Test Your Knowledge") Summary ### What is an arrhythmia? An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias. - When your heart beats faster than normal, it's called tachycardia. - When your heart beats too slowly, it's called bradycardia. - When the signal to beat comes too early, it's called a premature or extra heartbeat. It may feel like your heart skipped a beat. There are many types of arrhythmias. Arrhythmias may affect the upper or lower chamber of your heart. The most common type of arrhythmia is [atrial fibrillation](https://medlineplus.gov/atrialfibrillation.html), which causes an irregular and fast heartbeat. Some arrhythmias are harmless, such as when your heart rate speeds up during exercise and slows down when you sleep. But if you have a frequent irregular rhythm, it may mean your heart isn't pumping enough blood into your body. Getting treatment and following a [heart-healthy lifestyle](https://medlineplus.gov/howtopreventheartdisease.html) can help control arrhythmias. It may also help prevent heart damage that can trigger some heart arrhythmias. ### What causes an arrhythmia? Many factors can affect your heart's rhythm, such as having had a [heart attack](https://medlineplus.gov/heartattack.html), [smoking](https://medlineplus.gov/smoking.html), [congenital heart defects](https://medlineplus.gov/congenitalheartdefects.html), and stress. Other factors that could increase your risk for some types of arrhythmias could include if you: - Have a family history of arrhythmias. - Have certain health conditions, which can include [heart and blood vessel diseases](https://medlineplus.gov/heartdiseases.html), [lung diseases](https://medlineplus.gov/copd.html), [kidney diseases](https://medlineplus.gov/kidneydiseases.html), [obesity](https://medlineplus.gov/obesity.html), and [sleep apnea](https://medlineplus.gov/sleepapnea.html). - Are an older adult. - Have had recent surgery for your heart, lungs, or throat. - Take certain medicines for other health conditions. - Use [illegal drugs](https://medlineplus.gov/druguseandaddiction.html). If you have risk factors, some situations that make your heart work harder, raise your blood pressure, or cause strong emotional stress may trigger an arrhythmia. ### What are the symptoms of an arrhythmia? You may not have any noticeable symptoms of an arrhythmia. Your provider may find an arrhythmia during your [routine checkup](https://medlineplus.gov/healthcheckup.html). Symptoms of an arrhythmia can include: - Fast or slow heartbeat - Skipping, fluttering, or pounding heartbeats - [Chest pain](https://medlineplus.gov/chestpain.html) or discomfort - [Dizziness](https://medlineplus.gov/dizzinessandvertigo.html) or fainting - [Shortness of breath](https://medlineplus.gov/breathingproblems.html) - Sweating - Tiredness or weakness Seek emergency medical care if you have chest pain, shortness of breath, or think you are having a heart attack. ### How is an arrhythmia diagnosed? To find out if you have an arrhythmia, your health care provider may order an [electrocardiogram (EKG).](https://medlineplus.gov/lab-tests/electrocardiogram/) This test records your heart's electrical activity and is the most common for finding an arrhythmia. Your provider may also: - Ask about your medical history, including your symptoms and lifestyle habits. - Do a physical exam, which includes checking your heartbeat and pulse. - Order blood tests and other [heart tests](https://medlineplus.gov/hearthealthtests.html). - Check your legs or feet for swelling. - Look for signs of other health conditions that could cause an arrythmia, such as [thyroid disease](https://medlineplus.gov/thyroiddiseases.html). ### What are the treatments for an arrhythmia? Treatment may include medicines, an implantable cardioverter-defibrillator [(ICD) or pacemaker](https://medlineplus.gov/pacemakersandimplantabledefibrillators.html), or sometimes surgery. Your provider may also recommend avoiding activities that may trigger your arrhythmia. The goal of treatment is to restore a normal heart rhythm. If not treated, arrhythmias can damage your heart, brain, and other organs and could be life-threatening. ### Can arrhythmias be prevented? To help prevent an arrhythmia, your provider may suggest that you make heart-healthy lifestyle changes and treat health conditions that may cause arrhythmias. NIH: National Heart, Lung, and Blood Institute Start Here - [Categories of Arrhythmias](https://www.texasheart.org/heart-health/heart-information-center/topics/categories-of-arrhythmias/) (Texas Heart Institute) Also in [Spanish](https://www.texasheart.org/heart-health/heart-information-center/topics/categorias-de-arritmias/) - [What Is an Arrhythmia?](https://www.heart.org/en/health-topics/arrhythmia/about-arrhythmia) (American Heart Association) - [What Is an Arrhythmia?](https://www.nhlbi.nih.gov/health/arrhythmias) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/arritmias) - [Heart Palpitations Quiz](https://medlineplus.gov/ency/quiz/003081_33.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/quiz/003081_120.htm) - [Heart Anatomy](https://www.texasheart.org/heart-health/heart-information-center/topics/heart-anatomy/) (Texas Heart Institute) Also in [Spanish](https://www.texasheart.org/heart-health/heart-information-center/topics/anatomia-del-corazon/) - [Heart Information Center](https://www.texasheart.org/heart-health/heart-information-center/) (Texas Heart Institute) Also in [Spanish](https://www.texasheart.org/heart-health/heart-information-center/topics/glosario-de-terminologia-cardiovascular/) - [How the Heart Works](https://www.nhlbi.nih.gov/health/heart) ![From the National Institutes of Health](https://medlineplus.gov/images/nih.png) (National Heart, Lung, and Blood Institute) Also in [Spanish](https://www.nhlbi.nih.gov/es/salud/corazon) - [Arrhythmias](https://medlineplus.gov/ency/article/001101.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/001101.htm) - [Atrial fibrillation and atrial flutter](https://medlineplus.gov/ency/article/000184.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000184.htm) - [Cardiac ablation procedures](https://medlineplus.gov/ency/article/007368.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/007368.htm) - [Ectopic heartbeat](https://medlineplus.gov/ency/article/001100.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/001100.htm) - [Electrocardiogram](https://medlineplus.gov/ency/article/003868.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003868.htm) - [Exercise stress test](https://medlineplus.gov/ency/article/003878.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003878.htm) - [Heart palpitations](https://medlineplus.gov/ency/article/003081.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003081.htm) - [Holter monitor (24h)](https://medlineplus.gov/ency/article/003877.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/003877.htm) - [Paroxysmal supraventricular tachycardia (PSVT)](https://medlineplus.gov/ency/article/000183.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000183.htm) - [Ventricular tachycardia](https://medlineplus.gov/ency/article/000187.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000187.htm) - [Wolff-Parkinson-White syndrome (WPW)](https://medlineplus.gov/ency/article/000151.htm) (Medical Encyclopedia) Also in [Spanish](https://medlineplus.gov/spanish/ency/article/000151.htm)
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