Track your AF History with Apple Watch (2024)

Find out how to set up AF History to track how frequently your heart shows signs of AF and log life factors that can impact your condition.

About AF and AF History

Atrial fibrillation (AF) is a type of irregular heart rhythm where the upper chambers of the heart beat out of sync with the lower chambers.

According to the CDC, approximately 2%of people younger than 65 years old and 9%of people 65 and older have AF. Irregularities in heart rhythm become more common as people get older. Some individuals with AF don't experience any symptoms. Others experience symptoms that could include rapid heartbeat, palpitations, fatigue or shortness of breath.

AF is a chronic condition, but the amount of time people spend in AF can change. People with AFoften live healthy, active lives. The amount of time your heart is in AF can potentially be reduced with regular exercise, a heart-healthy diet, a healthyweight and treatment of other medical conditions that could worsen AF. If left untreated, AF can lead to heart failure or blood clots that may lead to a stroke.

AF History gives long-term visibility into the amount of time your heart shows signs of AF, also known as AF burden, so you can share this information with your doctor for richer conversations.

Here's what you need

  • You must have a diagnosis of AF.
  • Update your iPhone to the latest version of iOS and Apple Watch to the latest version of watchOS.
  • You must wear your Apple Watch at least 12 hours a day for 5 days a week to receive estimates consistently.
  • Heart Rate and Wrist Detection must be enabled on your Apple Watch.
  • AF History is not intended for use by people under 22 years old.

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Set up AF History

  1. On your iPhone, open the Health app.
  2. Tap Browse, then tap Heart.
  3. Tap AF History.
  4. Tap Set Up, then tap Get Started.
  5. Enter your Date of Birth.
  6. Select Yes to indicate that you have been diagnosed with AF by a doctor, then tap Continue.
  7. Tap Continue to find out more about AF History, the results you may see and life factors.
  8. Tap Done.

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Log Life Factors

AF History periodically checks your heart rhythm for signs of AF. Although AF can occur at any time, there are factors that may impact the percentage of time your heart showed signs of AF for the previous week. AF History looks at the following life factors that can impact the percentage of time your heart is in AF:

  • Exercise Minutes
  • Sleep
  • Weight
  • Alcohol Consumption
  • Mindful Minutes

If you wear your Apple Watch consistently when you work out, sleep or meditate, your Exercise Minutes, Sleep and Mindful Minutes will be logged automatically. You can tap each life factor, then tap Log to log the details manually. You can also tap a suggested third-party app to download from the App Store to track each factor.

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View your AF History estimate

After gathering enough readings, every Monday you'll receive weekly alerts on your Apple Watch with the estimated percentage of time your heart showed signs of AF from the previous week. You can also view your history in greater detail in the Health app.

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  1. On your iPhone, open the Health app.
  2. Tap Browse, then tap Heart.
  3. Tap AF History. If you have AF History saved to your Favourites, you can also access it from the Summary tab.

Your AF History estimate appears as a percentage. A lower percentage means your heart was in AF less often, while a higher percentage means more often. Your AF History will never be displayed as 0%. Instead, it will be displayed as 2% or less.

You can also tap Show Life Factors to compare a Life Factor with your AF History.

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View your AF History Highlights

AF History Highlightsshow you the day of week and time of day your heart is showing signs of AF most frequently. This can help you assess how life factors may be impacting your condition. AF History Highlights become available after 6 weeks of wearing your Apple Watch and gathering enough readings.

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  1. On your iPhone, open the Health app.
  2. Scroll to Highlights.
  3. Tap AF History.

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Share your AF History

If you're set up to share your health data in the Health app, family and friends can receive updates on your AF History. If you live in the United States, you can also share your AF History automatically with enrolled healthcare providers. Find out more about how to share and view health data in the Health app.

You can also export your AF History data to a PDF to share. From AF History, scroll down to Options and tap Export PDF. Tap the Share Button to send the PDF to someone in your Contacts, save to the Files app or AirDrop to another device.

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Things you should know

  • Low Power Mode turns off background heart measurements and may lead to no AF History estimates if enabled. Find out more about Low Power Mode.
  • Apple Watch cannot detect a heart attack or stroke.If you ever experience chest pain, pressure, tightness or what you think is a heart attack, call the emergency services immediately.
  • Apple Watch only checks for signs of atrial fibrillation periodically. AF History may not find every instance of your irregular rhythm.
  • AF History will not notify you when you're experiencing AF.
  • Do not change your medication without talking to your doctor.
  • Since the irregular rhythm notifications feature is not intended for people with AF, it will be turned off automatically when you set up AF History.

Published Date:

Track your AF History with Apple Watch (2024)

FAQs

How do I read my AFib history on Apple Watch? ›

View your AFib History estimate
  1. On your iPhone, open the Health app.
  2. Tap Browse, then tap Heart.
  3. Tap AFib History. If you have AFib History saved to your Favorites, you can also access it from the Summary tab.
May 21, 2024

How accurate is the Apple Watch for AFib? ›

In that group, the risk of having Afib is low. So, even if the apple watch is wrong only a small percent of time, what ends up happening is that the alerts by the watch will be wrong 45% of the time. This has been estimated by physician-scientist Sekar Kathiresan.

What is the AF history 2% or less on Apple Watch? ›

A lower percentage means your heart was in AF less often, while a higher percentage means more often. Your AF History will never be displayed as 0%. Instead, it will be displayed as 2% or less. You can also tap Show Life Factors to compare a Life Factor with your AF History.

Which Apple Watch is best for AFib detection? ›

Description: The Apple Watch Series 9 is a top choice for AFib monitoring, featuring a built-in heart rate sensor and ECG app for accurate heart rhythm recording. With its sleek design and seamless integration with other Apple devices, it offers convenience and ease of use.

Can anxiety cause AFib? ›

The study measured 412 people's stress levels across 13 years and concluded that chronically high-stress levels could lead to a cardiovascular condition or event (like a heart attack). Because stress and anxiety might cause hypertension, it is possible that they contribute to the development of AFib.

What is a normal AFib burden? ›

Of the 1965 patients evaluated, the median AF burden was 4.4% (1.1% to 17.2%) An AF burden of 11.4 percent or higher was associated with more than three-fold increased risk for stroke or TE event after adjusting for either CHA2DS2-VASc or ATRIA scores.

Can you get false positives on Apple Watch for AFib? ›

In adults with known atrial fibrillation, the Apple Watch had a low rate of false-positive detections and high specificity. Sensitivity for detection by participant and by AF episode was lower.

Is the ECG app on Apple Watch accurate? ›

With that said, the Apple Watch ECG accuracy, while not perfect, has proven itself to be significantly reliable, and it provides a substantial benefit for people with Afib or at risk of Afib. You may even want to learn how to read an ECG.

Can an Apple Watch detect sleep apnea? ›

The Takeaway. The new Apple Watch won't be able to diagnose sleep apnea. However, it may be able to detect sleep apnea symptoms, alerting you to contact your doctor for further testing. From there, an in-lab sleep study or home sleep test will be required to diagnose sleep apnea accurately.

Does the Apple Watch pick up palpitations? ›

On Apple Watch Series 1 or later, the IRNF analyzes pulse rate data collected by the photoplethysmograph (PPG) sensor to identify episodes of irregular heart rhythms suggestive of AFib, and it provides a notification to the user when it detects an episode.

What are good numbers for AFib? ›

What is a Normal Heart Rate for Someone with Atrial Fibrillation? The normal heart rate for someone without A-fib typically runs from 60-100 beats per minute, while a patient with A-fib may see a heart rate jump to 100-200 beats per minute.

What percentage of people have atrial fibrillation? ›

According to the Centers for Disease Control and Prevention (CDC) , approximately 2 percent of people younger than 65 years old have AFib, while about 9 percent of people ages 65 and older have it.

How accurate is AFib history on Apple Watch? ›

An Apple Watch feature designed to detect atrial fibrillation (AF) was associated with a low rate of false-positive detections and high specificity, but only modest sensitivity for detections in persons with a history of AF, according to a new study published in the Journal of Cardiovascular Electrophysiology.

What watch do cardiologists recommend? ›

Top 3 features of best smartwatches for heart patients for you
Best smartwatch for heart patientsDisplay
Noise Newly Launched Endeavour Smart Watch1.46 inch AMOLED Always On
Apple Watch SE (2nd Gen) [GPS 40 mm]1.78 inches
Fastrack Reflex Play Smart Watch1.3 inch AMOLED
Apple Watch Series 91.7 inches
6 more rows
Jan 4, 2024

Are palpitations the same as AFib? ›

Because a lot of us carry unmanaged stress around like it's necessary, palpitations can send the heart fluttering at any moment, without a moment's notice. Atrial fibrillation, aka AFib, is different. This event occurs as a result if a misfire of electrical signals to the heart.

What does AF look like on an Apple Watch? ›

To recognize Afib on your watch ECG, look for an irregularly irregular rhythm with fibrillatory waves instead of visible P waves.

What does AFib look like on ECG? ›

Diagnosis – Atrial Fibrillation. The diagnosis of atrial fibrillation is confirmed with a standard 12-lead ECG. P waves are absent, coarse “fibrillatory waves” can frequently be seen and sometimes no atrial activity can be identified. The QRS complexes are “irregularly irregular”, with varying R-R intervals.

Does AFib come and go? ›

Episodes of atrial fibrillation may come and go, or they may be persistent. AFib itself usually isn't life-threatening. But it's a serious medical condition that needs proper treatment to prevent stroke.

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