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Apple Watch can now detect your irregular heart rhythms and other problems: Here's how it works

Anyone over age 22 can use these new heart health features, although not all them are designed for people who have already been diagnosed with atrial fibrillation, or AFib, by their doctor. It also did a clinical trial with 600 other participants to ensure it could distinguish between a normal heartbeat, or sinus rhythm, and atrial fibrillation. Once you install the latest software on your watch, migrate over to the Watch app on your iPhone. From there, scroll down to heart health and you'll see a new menu of options to enable a set of notifications for Apple to detect an irregular rhythm, and to view your ECG readings once you take them. That basically means the heart is beating in a uniform pattern, and the Apple Watch hasn't detected an irregularity in your heart rhythm with its sensor.

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