Opinion: The Apple Watch 4 is an iffy atrial fibrillation detector in those under age 55
For people under age 55, a warning from an Apple Watch 4 about atrial fibrillation is wrong far more often than it is right. But it is more accurate for…
by Daniel Yazdi
Jan 08, 2019
2 minutes
The Apple Watch 4 can now do something that was once available mainly in your doctor’s office or a hospital: take an electrocardiogram. This recording of your heart’s rhythm can detect rapid or skipped heartbeats. The watch can also check your heart’s rhythm in the background and notify you if an irregular rhythm appears to be atrial fibrillation.
That’s a useful task. A heart in atrial fibrillation beats
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