🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 35 (from laksa036)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa035.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://www.sja.org.uk/first-aid-advice/heart-attack/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.sja.org.uk/first-aid-advice/heart-attack/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.sja.org.uk\/first-aid-advice\/heart-attack\/","crawl_time":1775860303,"first_indexed_time":1751796790,"http_code":200,"src_unparsed":"uk,org,sja!www,\/first-aid-advice\/heart-attack\/ s443","src_root_hash":"7644301245934518435","history_drop_reason":null,"meta_title":"Heart Attack Symptoms & First Aid | St John Ambulance","meta_descriptions":["Discover first aid advice from St John Ambulance about heart attacks, including the causes, signs and symptoms of a heart attack, as well as further treatment."],"attrs_boilerpipe_text":"Home\nFirst aid advice\nHeart attack\nAngina is pain in the chest, which can happen with increased exertion or excitement. Find out what to look for and what to do.\nIf an adult is unresponsive and not breathing normally, you need to call 999 or 112 for emergency help and start CPR straight away. Learn what to do.\nUse the primary survey to quickly assess the situation and check the casualty for injuries or conditions that could be immediately life threatening. Find out what to do.\nLet's stay in touch\nKeep up to date with our latest news, first aid advice and inspiring stories\nClose\nLog into your account\nClose\nThere is an error with your details. Either your email address or password is not recognised.\nHi\n${ email }\n, you successfully signed in!\nClosing in ${ countDownSeconds } seconds.\nYou can now\nproceed to the checkout\n.\nUsername\n${ errors.first(\"email\") }\nPassword\nPassword requirements:\nMinimum 12 characters\nMinimum 1 number\nMinimum 1 uppercase or special character\n${ errors.first(\"password\") }\nForgotten password?\nClose\nDon't have an account?\nAre you a National or Key Account customer?\nLog in at our\nmajor accounts portal.\nWe've sent you an email on how to re-set your password. Please follow the instructions.\nClosing in ${ countDownSeconds } seconds.\n${ error }\nEnter your email address below and we will send you instructions on how to create a new password.\nEmail address\n${ errors.first('email') }\n${ error }\nYour email address is registered on our Major Accounts portal – to receive your agreed pricing for training courses please proceed to the portal.","attrs_markdown":"![](https:\/\/www.facebook.com\/tr?id=479987996204896&ev=PageView&noscript=1)\n\nYou currently have JavaScript disabled in your web browser, please enable JavaScript to view our website as intended. [Here are the instructions of how to enable JavaScript in your browser](http:\/\/www.enable-javascript.com\/).\n\n## Utility navigation\n- [BASKET (\\${total})](https:\/\/www.sja.org.uk\/basket\/)\n## Search\n\n[![](https:\/\/www.sja.org.uk\/globalassets\/test\/global-assets\/sja_logo_correct_sized1.png?&w=198&h=70&anchor=middlecenter) St John Ambulance Home](https:\/\/www.sja.org.uk\/ \"Return to Homepage\")\n\n[Donate](https:\/\/www.sja.org.uk\/donate\/)\n\n## Search\n## User navigation\n- [Home](https:\/\/www.sja.org.uk\/)\n- [Courses](https:\/\/www.sja.org.uk\/courses\/)\n  [Workplace First Aid Courses](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/)\n  \n  [Blended Online First Aid Courses](https:\/\/www.sja.org.uk\/courses\/blended-online-first-aid-courses\/)\n  \n  [Mental Health Courses](https:\/\/www.sja.org.uk\/courses\/workplace-mental-health-first-aid\/)\n  \n  [In-house and On-site Training](https:\/\/www.sja.org.uk\/course-information\/guidance-and-help\/in-house-on-site-training\/)\n  \n  [eLearning Courses](https:\/\/www.sja.org.uk\/course-information\/e-learning\/)\n  ### [Workplace First Aid Courses](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/)\n  [First Aid at Work](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/hse-first-aid-at-work\/book-faw\/) [Emergency First Aid at Work](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/emergency-first-aid\/book-efaw\/) [First Aid at Work Requalification](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/first-aid-requalification\/book-fawr\/) [First Aid Annual Refresher](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/annual-refresher-training\/book-arfa\/) [Automated External Defibrillation (AED)](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/defibrillator-cpr-training\/book-aed\/)\n  \n  ### [Blended Online First Aid Courses](https:\/\/www.sja.org.uk\/courses\/blended-online-first-aid-courses\/)\n  [Emergency First Aid At Work - Blended Online](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/emergency-first-aid-at-work-blended-online\/book-efawbl\/) [First Aid At Work - Blended Online](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/first-aid-at-work-blended-online\/book-ofaw\/) [First Aid At Work Requalification - Blended Online](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/blended-online-first-aid-at-work-requalification\/book-ofawr\/) [Paediatric First Aid - Blended Online](https:\/\/www.sja.org.uk\/courses\/schools-first-aid\/blended-online-paediatric-first-aid\/book-opf\/)\n  \n  ### [Mental Health Courses](https:\/\/www.sja.org.uk\/courses\/workplace-mental-health-first-aid\/)\n  [Mental Health First Aid (2 Days)](https:\/\/www.sja.org.uk\/courses\/workplace-mental-health-first-aid\/mental-health-first-aid\/book\/) [Mental Health Advocate (1 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Marshal](https:\/\/www.sja.org.uk\/courses\/workplace-health-safety\/fire-marshal\/book-fm\/) [Health and Safety Courses](https:\/\/www.sja.org.uk\/courses\/workplace-health-safety\/) [Courses for Schools](https:\/\/www.sja.org.uk\/courses\/schools-first-aid\/) [Courses for Individuals and Community Groups](https:\/\/www.sja.org.uk\/courses\/individuals-community-groups\/) [HSS Construction Health & Safety Courses](https:\/\/www.sja.org.uk\/st-john-ambulance-hss-training\/) [Free eLearning Modules](https:\/\/www.sja.org.uk\/course-information\/online-learning\/)\n- [Online advice](https:\/\/www.sja.org.uk\/get-advice\/)\n  [First aid advice](https:\/\/www.sja.org.uk\/first-aid-advice\/)\n  \n  [Free first aid resources](https:\/\/www.sja.org.uk\/get-advice\/free-resources\/)\n  \n  [Need to know](https:\/\/www.sja.org.uk\/get-advice\/i-need-to-know\/)\n  ### [First aid advice](https:\/\/www.sja.org.uk\/first-aid-advice\/)\n  [CPR](https:\/\/www.sja.org.uk\/first-aid-advice\/cpr\/) [Basic life support](https:\/\/www.sja.org.uk\/get-advice\/basic-life-support\/) [Paediatric first aid](https:\/\/www.sja.org.uk\/get-advice\/paediatric-first-aid\/)\n  \n  ### [Free first aid resources](https:\/\/www.sja.org.uk\/get-advice\/free-resources\/)\n  [Lesson plans](https:\/\/www.sja.org.uk\/get-advice\/first-aid-lesson-plans\/) [Accessible resources](https:\/\/www.sja.org.uk\/get-advice\/accessible-first-aid-resources\/) [Translated resources](https:\/\/www.sja.org.uk\/get-advice\/translated-first-aid-resources\/) [Posters](https:\/\/www.sja.org.uk\/get-advice\/free-first-aid-posters\/)\n  ### [Need to know](https:\/\/www.sja.org.uk\/get-advice\/i-need-to-know\/)\n  ### [Free first aid apps](https:\/\/www.sja.org.uk\/get-advice\/free-first-aid-app\/)\n- [First aid supplies](https:\/\/shop.sja.org.uk\/)\n  ###\n  [Defibrillators](https:\/\/shop.sja.org.uk\/collections\/aed-defibrillators) [Defibrillator Bundles](https:\/\/shop.sja.org.uk\/collections\/defibrillator-bundles) 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cover](https:\/\/www.sja.org.uk\/event-medical-cover\/) [Ambulance operations](https:\/\/www.sja.org.uk\/what-we-do\/ambulance-operations\/)\n  \n  ### Our people\n  [Our leadership team](https:\/\/www.sja.org.uk\/about-us\/governance-and-leadership\/) [Our clinical team](https:\/\/www.sja.org.uk\/about-us\/our-clinical-team\/) [Our celebrity ambassadors](https:\/\/www.sja.org.uk\/celebrity-ambassadors\/) [Our jobs](https:\/\/www.sja.org.uk\/careers-at-sja\/)\n  \n  ### [What we do](https:\/\/www.sja.org.uk\/what-we-do\/)\n  [Our strategy](https:\/\/www.sja.org.uk\/about-us\/our-strategy\/) [Annual report](https:\/\/www.sja.org.uk\/about-us\/annual-reports\/) [Impact report](https:\/\/www.sja.org.uk\/about-us\/impact-report\/) [Where your money goes](https:\/\/www.sja.org.uk\/where-your-money-goes\/)\n\n## Donate navigation\n- [Donate](https:\/\/www.sja.org.uk\/donate\/)\n\n- [Home](https:\/\/www.sja.org.uk\/ \"Home\")\n- [First aid advice](https:\/\/www.sja.org.uk\/first-aid-advice\/ \"First aid advice\")\n- Heart attack\n\n# Heart attack\nA heart attack happens when the supply of blood to part of the heart is suddenly blocked, usually by a blood clot. Find out what to do and how to perform first aid.\n\n### Emergency advice\n**If someone is having a heart attack:**\n\n1. Call 999 or 112.\n2. Sit them down with head and shoulders supported, knees bent.\n3. Give 300mg of aspirin to chew. Do not give aspirin to the casualty if they are under 16 or if they are allergic to it.\n4. Monitor level of response.\n\n## What is a heart attack?\nA heart attack happens when the supply of blood to part of the heart is suddenly blocked, usually by a blood clot. You can make a full recovery following a heart attack, but this may depend on how much of the heart is affected.\n\n## Signs and symptoms\nSomeone having a heart attack may:\n\n- have crushing pain in the centre of their chest, that may spread to their jaw, and down one or both arms\n- be breathless or gasping for breath\n- be sweating profusely\n- experience pain similar to indigestion\n- collapse without warning\n- complain of dizziness\n- have pale skin and their lips may have a blue tinge\n- have a rapid, weak, or irregular pulse\n- have a feeling of impending doom.\n\n## What to do\n1. ![First aid - call 999 or 112 for emergency help](https:\/\/www.sja.org.uk\/Static\/dist\/images\/spacer.gif)\n   \n   Call 999 or 112 for emergency help straight away and tell them you think someone is having a heart attack.\n2. ![Heart attack first aid - help the casualty into a comfortable position](https:\/\/www.sja.org.uk\/Static\/dist\/images\/spacer.gif)\n   \n   Help move the casualty into a comfortable position. The best position is on the floor, with their knees bent and their head and shoulders supported.\n   \n   - You could place cushions behind them or under their knees.\n3. ![Heart attack first aid - give them one aspirin tablet](https:\/\/www.sja.org.uk\/Static\/dist\/images\/spacer.gif)\n   \n   Give them one aspirin tablet (300mg) and ask them to chew it slowly.\n   \n   - Do not give aspirin to the casualty if they are under 16 or if they are allergic to it.\n4. ![Heart attack first aid - ask the casualty to take their own angina medication](https:\/\/www.sja.org.uk\/Static\/dist\/images\/spacer.gif)\n   \n   Ask the casualty to take their own angina medication, if they have some.\n5. ![Heart attack first aid - help the casualty into a comfortable position](https:\/\/www.sja.org.uk\/Static\/dist\/images\/spacer.gif)\n   \n   Keep monitoring the casualty’s level of response until emergency help arrives.\n   \n   - If they become unresponsive at any point, prepare to start [CPR](https:\/\/www.sja.org.uk\/first-aid-advice\/cpr\/ \"How to do CPR\").\n\n### Share\n- [Facebook ![Facebook Share Icon](https:\/\/www.sja.org.uk\/globalassets\/social-assets\/facebook_dark_icon.png)](https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fwww.sja.org.uk%2Ffirst-aid-advice%2Fheart-attack%2F \"Facebook\")\n- [Twitter ![twitter-2023-logo](https:\/\/www.sja.org.uk\/contentassets\/86b738a2b4234f878b260909be7ff149\/twitter-2023-logo.png)](https:\/\/twitter.com\/intent\/tweet\/?text=A+heart+attack+happens+when+the+supply+of+blood+to+part+of+the+heart+is+suddenly+blocked%2C+usually+by+a+blood+clot.+Find+out+what+to+look+for+and+what+to+do.&url=https%3A%2F%2Fwww.sja.org.uk%2Ffirst-aid-advice%2Fheart-attack%2F \"Twitter\")\n- [![Email Share Icon](https:\/\/www.sja.org.uk\/globalassets\/social-assets\/email_dark_icon.png)](<mailto:?subject=Heart attack first aid advice&body=Do you know what to do if someone has a heart attack? Read this advice from St John Ambulance to learn how you can help. https:\/\/www.sja.org.uk\/first-aid-advice\/heart-attack\/> \"Share by Email\")\n\n### Authorship\nClinically reviewed by Dr Lynn Thomas, OStJ, BSc, MB.BS, MA, FRCP\n\nPage last reviewed: 28 April 2025\n\n[More information about our clinical expertise](https:\/\/www.sja.org.uk\/about-us\/our-clinical-team\/)\n\n### Our training courses:\n#### First aid courses\n[![First aid courses](https:\/\/www.sja.org.uk\/globalassets\/small-pod-block-images\/training\/first-aid-at-work-small-pod.jpg)](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/)\n\n[View](https:\/\/www.sja.org.uk\/courses\/workplace-first-aid\/)\n***\n\n## Related first aid advice\n### Angina attack\nAngina is pain in the chest, which can happen with increased exertion or excitement. Find out what to look for and what to do.\n\n[Angina attack](https:\/\/www.sja.org.uk\/first-aid-advice\/angina\/)\n\n### CPR\nIf an adult is unresponsive and not breathing normally, you need to call 999 or 112 for emergency help and start CPR straight away. Learn what to do.\n\n[CPR](https:\/\/www.sja.org.uk\/first-aid-advice\/cpr\/)\n\n### Primary survey\nUse the primary survey to quickly assess the situation and check the casualty for injuries or conditions that could be immediately life threatening. 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Boilerpipe Text	Home First aid advice Heart attack Angina is pain in the chest, which can happen with increased exertion or excitement. Find out what to look for and what to do. If an adult is unresponsive and not breathing normally, you need to call 999 or 112 for emergency help and start CPR straight away. Learn what to do. Use the primary survey to quickly assess the situation and check the casualty for injuries or conditions that could be immediately life threatening. Find out what to do. Let's stay in touch Keep up to date with our latest news, first aid advice and inspiring stories Close Log into your account Close There is an error with your details. Either your email address or password is not recognised. Hi ${ email } , you successfully signed in! Closing in ${ countDownSeconds } seconds. You can now proceed to the checkout . Username ${ errors.first("email") } Password Password requirements: Minimum 12 characters Minimum 1 number Minimum 1 uppercase or special character ${ errors.first("password") } Forgotten password? Close Don't have an account? Are you a National or Key Account customer? Log in at our major accounts portal. We've sent you an email on how to re-set your password. Please follow the instructions. Closing in ${ countDownSeconds } seconds. ${ error } Enter your email address below and we will send you instructions on how to create a new password. Email address ${ errors.first('email') } ${ error } Your email address is registered on our Major Accounts portal – to receive your agreed pricing for training courses please proceed to the portal.
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[Donate](https://www.sja.org.uk/donate/) - [Home](https://www.sja.org.uk/ "Home") - [First aid advice](https://www.sja.org.uk/first-aid-advice/ "First aid advice") - Heart attack # Heart attack A heart attack happens when the supply of blood to part of the heart is suddenly blocked, usually by a blood clot. Find out what to do and how to perform first aid. ### Emergency advice If someone is having a heart attack: 1. Call 999 or 112. 2. Sit them down with head and shoulders supported, knees bent. 3. Give 300mg of aspirin to chew. Do not give aspirin to the casualty if they are under 16 or if they are allergic to it. 4. Monitor level of response. ## What is a heart attack? A heart attack happens when the supply of blood to part of the heart is suddenly blocked, usually by a blood clot. You can make a full recovery following a heart attack, but this may depend on how much of the heart is affected. ## Signs and symptoms Someone having a heart attack may: - have crushing pain in the centre of their chest, that may spread to their jaw, and down one or both arms - be breathless or gasping for breath - be sweating profusely - experience pain similar to indigestion - collapse without warning - complain of dizziness - have pale skin and their lips may have a blue tinge - have a rapid, weak, or irregular pulse - have a feeling of impending doom. ## What to do 1. ![First aid - call 999 or 112 for emergency help](https://www.sja.org.uk/Static/dist/images/spacer.gif) Call 999 or 112 for emergency help straight away and tell them you think someone is having a heart attack. 2. ![Heart attack first aid - help the casualty into a comfortable position](https://www.sja.org.uk/Static/dist/images/spacer.gif) Help move the casualty into a comfortable position. The best position is on the floor, with their knees bent and their head and shoulders supported. - You could place cushions behind them or under their knees. 3. ![Heart attack first aid - give them one aspirin tablet](https://www.sja.org.uk/Static/dist/images/spacer.gif) Give them one aspirin tablet (300mg) and ask them to chew it slowly. - Do not give aspirin to the casualty if they are under 16 or if they are allergic to it. 4. ![Heart attack first aid - ask the casualty to take their own angina medication](https://www.sja.org.uk/Static/dist/images/spacer.gif) Ask the casualty to take their own angina medication, if they have some. 5. ![Heart attack first aid - help the casualty into a comfortable position](https://www.sja.org.uk/Static/dist/images/spacer.gif) Keep monitoring the casualty’s level of response until emergency help arrives. - If they become unresponsive at any point, prepare to start [CPR](https://www.sja.org.uk/first-aid-advice/cpr/ "How to do CPR"). ### Share - [Facebook ![Facebook Share Icon](https://www.sja.org.uk/globalassets/social-assets/facebook_dark_icon.png)](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Fwww.sja.org.uk%2Ffirst-aid-advice%2Fheart-attack%2F "Facebook") - [Twitter ![twitter-2023-logo](https://www.sja.org.uk/contentassets/86b738a2b4234f878b260909be7ff149/twitter-2023-logo.png)](https://twitter.com/intent/tweet/?text=A+heart+attack+happens+when+the+supply+of+blood+to+part+of+the+heart+is+suddenly+blocked%2C+usually+by+a+blood+clot.+Find+out+what+to+look+for+and+what+to+do.&url=https%3A%2F%2Fwww.sja.org.uk%2Ffirst-aid-advice%2Fheart-attack%2F "Twitter") - [![Email Share Icon](https://www.sja.org.uk/globalassets/social-assets/email_dark_icon.png)](<mailto:?subject=Heart attack first aid advice&body=Do you know what to do if someone has a heart attack? Read this advice from St John Ambulance to learn how you can help. https://www.sja.org.uk/first-aid-advice/heart-attack/> "Share by Email") ### Authorship Clinically reviewed by Dr Lynn Thomas, OStJ, BSc, MB.BS, MA, FRCP Page last reviewed: 28 April 2025 [More information about our clinical expertise](https://www.sja.org.uk/about-us/our-clinical-team/) ### Our training courses: #### First aid courses [![First aid courses](https://www.sja.org.uk/globalassets/small-pod-block-images/training/first-aid-at-work-small-pod.jpg)](https://www.sja.org.uk/courses/workplace-first-aid/) [View](https://www.sja.org.uk/courses/workplace-first-aid/) * ## Related first aid advice ### Angina attack Angina is pain in the chest, which can happen with increased exertion or excitement. Find out what to look for and what to do. [Angina attack](https://www.sja.org.uk/first-aid-advice/angina/) ### CPR If an adult is unresponsive and not breathing normally, you need to call 999 or 112 for emergency help and start CPR straight away. Learn what to do. [CPR](https://www.sja.org.uk/first-aid-advice/cpr/) ### Primary survey Use the primary survey to quickly assess the situation and check the casualty for injuries or conditions that could be immediately life threatening. Find out what to do. 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Readable Markdown	- [Home](https://www.sja.org.uk/ "Home") - [First aid advice](https://www.sja.org.uk/first-aid-advice/ "First aid advice") - Heart attack Angina is pain in the chest, which can happen with increased exertion or excitement. Find out what to look for and what to do. If an adult is unresponsive and not breathing normally, you need to call 999 or 112 for emergency help and start CPR straight away. Learn what to do. Use the primary survey to quickly assess the situation and check the casualty for injuries or conditions that could be immediately life threatening. Find out what to do. ## Let's stay in touch Keep up to date with our latest news, first aid advice and inspiring stories [Close](https://www.sja.org.uk/first-aid-advice/heart-attack/) ### Log into your account [Close](https://www.sja.org.uk/first-aid-advice/heart-attack/) There is an error with your details. Either your email address or password is not recognised. Hi \${ email }, you successfully signed in\! Closing in \${ countDownSeconds } seconds. You can now [proceed to the checkout](https://www.sja.org.uk/basket/). [Close](https://www.sja.org.uk/first-aid-advice/heart-attack/) ### Don't have an account? Are you a National or Key Account customer? Log in at our [major accounts portal.](https://myportal.sja.org.uk/User/LogOn.aspx?ReturnUrl=/) We've sent you an email on how to re-set your password. Please follow the instructions. Closing in \${ countDownSeconds } seconds. \${ error } Enter your email address below and we will send you instructions on how to create a new password. Email address \${ errors.first('email') } \${ error } Your email address is registered on our Major Accounts portal – to receive your agreed pricing for training courses please proceed to the portal.
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