Yes - the FDA cleared the Apple Watch ECG app to detect atrial fibrillation, and a second feature flags irregular pulse rhythms suggestive of AFib.
A notification means the watch found a pattern consistent with AFib and the next step is a doctor who confirms it with a medical-grade ECG. It is a screening layer, not a diagnosis - and a silent watch does not clear new palpitations or dizziness, since it samples rather than monitors continuously.
What to do
Common questions
Can an Apple Watch detect AFib?
Yes - this one is real and regulatory. The FDA cleared two Apple Watch features: an ECG app that records a single-lead electrocardiogram from your finger on the crown and classifies the rhythm as atrial fibrillation or normal sinus rhythm, and a background feature that analyzes pulse data and notifies you of irregular rhythms suggestive of AFib. Both went through the FDA's review process for mobile medical apps. What a notification means: the watch found a pattern consistent with AFib - a rhythm disorder that matters because untreated AFib raises stroke risk - and the next step is a doctor, who confirms it with a medical-grade ECG before anyone says the word diagnosis. What it does not mean: panic, since AFib notifications occasionally fire on other rhythm quirks, and it also does not mean you are clear when silent - the watch samples, it does not watch continuously. New palpitations, racing, or dizziness deserve a visit even with a quiet watch. Pymander, a free AI doctor available 24/7 by text, can help you prepare for that appointment.