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You can take an electrocardiogram (ECG) with the ECG app.<\/p>\n<\/div>\n
An electrocardiogram (also called an ECG or EKG) is a test that records the timing and strength of the electrical signals that make the heart beat. By looking at an ECG, a doctor can gain insights about your heart rhythm and look for irregularities.<\/p>\n
The ECG app can record your heartbeat and rhythm using\u00a0the electrical heart sensor on Apple Watch Series 4, Series 5, or Series 6*<\/a>\u00a0and then check the recording for\u00a0atrial fibrillation<\/a>\u00a0(AFib), a form of irregular rhythm.<\/p>\n The ECG app records an electrocardiogram which represents the electrical pulses that make your heart beat. The ECG app checks these pulses to get your heart rate and see if the upper and lower chambers of your heart are in rhythm. If they\u2019re out of rhythm, that could be AFib.<\/p>\n The ECG app is currently available only in certain countries and regions.\u00a0Learn where the ECG app is available<\/a>.<\/p>\n *The ECG app is not supported on Apple Watch SE.<\/span><\/p>\n<\/div>\n The ECG app\u00a0 If you still don\u2019t see the app on your Apple Watch, open the Watch App on your iPhone and tap Heart. In the ECG section, tap Install to install the ECG app.<\/p>\n The ECG app isn’t available in every country or region.\u00a0Learn where the ECG app is available<\/a>.<\/span><\/p>\n<\/div>\n<\/div>\n You can take an ECG at any time, when you\u2019re feeling symptoms such as a rapid or skipped heartbeat,\u00a0when\u00a0you\u00a0have other general concerns about your heart health,\u00a0or when you receive an\u00a0irregular rhythm notification<\/a>.<\/p>\n After a successful reading, you will receive one of the following type of results\u00a0on your ECG app. Regardless of the result, if you aren’t feeling well or are experiencing any symptoms, you should talk to your doctor.<\/p>\n<\/div>\n A sinus rhythm result means the heart is beating in a uniform pattern between 50\u00a0and\u00a0100 BPM. This happens when the upper and lower chambers of the heart are beating in sync. A sinus rhythm result only applies to that particular recording and doesn\u2019t mean your heart beats with a consistent pattern all the time. It also does not mean that you’re healthy. If you’re not feeling well or are feeling any symptoms, you should talk to your doctor.<\/p>\n<\/div>\n<\/div>\n An AFib result means the heart is beating in an irregular pattern. The ECG app ver. 1 can check for AFib\u00a0between 50\u00a0and\u00a0120 BPM. The ECG app ver. 2 can check for AFib between 50 and 150 BPM.* AFib is the most common form of serious arrhythmia, or\u00a0irregular heart rhythm<\/a>. If you receive an AFib classification and you have not been diagnosed with AFib, you should talk to your doctor.<\/p>\n *Learn more\u00a0about ECG app version availability<\/a>\u00a0and find out which version you’re using.<\/span><\/p>\n<\/div>\n<\/div>\n A heart rate under 50 BPM or over 120 BPM in ECG version 1\u00a0affects the ECG app\u2019s ability to check for AFib.\u00a0In ECG version 2, a heart rate under 50 BPM or over 150 BPM can affect the ECG’s app ability to check for AFib.<\/p>\n An inconclusive result means the recording can\u2019t be classified.\u00a0It could be due to one of the following situations:<\/p>\n For ECG version 1, you might also get an inconclusive result if you are not resting your arms on a table during a recording, or\u00a0wearing\u00a0your Apple Watch\u00a0too loose. Learn how to\u00a0get the best results<\/a>.<\/p>\n<\/div>\n<\/div>\n This classification is unique to ECG version 2. Poor Recording means the result can’t be classified. If you get a Poor Recording result, there are a few things you can try in order to get a better recording.<\/p>\n If you need help,\u00a0contact Apple Support<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n The ECG waveform, its associated classifications, and any noted symptoms will be saved in the Health app on your iPhone. You can also share a PDF with your doctor.<\/p>\n A small percentage of people may have certain physiological conditions preventing the creation of enough signal to produce a good recording\u00a0\u2014\u00a0for example, the positioning of the heart in the chest can change the electrical signal levels, which could impact the ECG app\u2019s ability to obtain a measurement.<\/p>\n Liquid-free contact is required for the ECG app to work properly. Use of the ECG app may be impacted if\u00a0the Apple\u00a0Watch and\/or skin aren’t entirely dry. Make sure that your wrist and hands are thoroughly dry before attempting a\u00a0reading. To ensure the best reading after\u00a0swimming, showering, heavy perspiration, or washing your\u00a0hands,\u00a0clean and dry your Apple Watch<\/a>.\u00a0It may take up to one hour for your Apple Watch to completely dry.<\/p>\n<\/div>\n<\/div>\n The ECG app on Apple Watch Series 4,\u00a0Series 5, or Series 6\u00a0generates an ECG that is similar to a single-lead (or Lead I) ECG. In a doctor\u2019s office, a standard 12-lead ECG is usually taken. This 12-lead ECG records electrical signals from different angles in the heart to produce twelve different waveforms. The ECG app on Apple Watch measures a waveform similar to one of those twelve waveforms.\u00a0A single-lead ECG is able to provide information about heart rate and heart rhythm and enables classification of AFib. However, a single-lead ECG cannot be used to identify some other conditions, like heart attacks. Single-lead ECGs are often prescribed by doctors for people to wear at home or within the hospital so that the doctor can get a better look at the underlying rate and rhythm of the heart.\u00a0However, the ECG app on Apple Watch Series 4,\u00a0Series 5, or Series 6\u00a0allows you to generate an ECG similar to a single-lead ECG without a prescription from your doctor.<\/p>\n In studies comparing the ECG app on Apple Watch\u00a0to a standard 12-lead ECG taken at the same time, there was agreement between the ECG app classification of the rhythm as sinus or AFib\u00a0compared to the standard 12-lead ECG.<\/p>\n The ability of the ECG app to accurately classify an ECG recording into AFib and sinus rhythm was tested in a clinical trial of approximately 600 subjects, and demonstrated 99.6% specificity with respect to sinus rhythm classification and 98.3% sensitivity for AFib classification for the classifiable results.<\/p>\n The clinical validation results reflect use in a controlled environment. Real world use of the ECG app may result in a greater number\u00a0of strips being deemed inconclusive and not classifiable.<\/p>\n\nHere’s what you need<\/h3>\n
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<\/p>\n<\/div>\n<\/div>\n\nInstall and set up the ECG app<\/h3>\n
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\u00a0is installed during the ECG app setup in the Health app.\u00a0Follow these steps to set up the ECG app:<\/p>\n\n
\u00a0to take an ECG.<\/li>\n<\/ol>\n\n\n![\"\"](\"https:\/\/support.apple.com\/library\/content\/dam\/edam\/applecare\/images\/en_US\/il\/spacer.png\"){kind=spacer}
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<\/div>\n<\/div>\n\nTake an ECG<\/h3>\n
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\u00a0on your Apple Watch.<\/li>\n\n\n![\"\"](\"https:\/\/support.apple.com\/library\/content\/dam\/edam\/applecare\/images\/en_US\/mac_apps\/itunes\/divider.png\")
<\/p>\n<\/div>\n<\/div>\n\nHow to read results<\/h2>\n
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<\/p>\n<\/div>\n<\/div>\n\nSinus rhythm<\/h3>\n
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<\/p>\n<\/div>\n<\/div>\n\nAtrial fibrillation<\/h3>\n
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<\/p>\n<\/div>\n<\/div>\n\nLow or high heart rate<\/h3>\n
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<\/p>\n<\/div>\n<\/div>\n\nInconclusive<\/h3>\n
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\nPoor Recording<\/h3>\n
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<\/p>\n<\/div>\n<\/div>\n\nView and share your Health information<\/h2>\n
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![\"\"](\"https:\/\/support.apple.com\/library\/content\/dam\/edam\/applecare\/images\/en_US\/il\/ios14-share-icon.png\"){kind=icon}
\u00a0<\/strong>to print or share the PDF.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n\n\n<\/p>\n<\/div>\n<\/div>\n\nHow to get the best results<\/h2>\n
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\n\n<\/p>\n<\/div>\n<\/div>\n\nThings you should know<\/h2>\n
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\n\n<\/p>\n<\/div>\n<\/div>\n\nHow the ECG app works<\/h2>\n
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