Apple Watch Can Now Detect Your Irregular Heart Rhythms And Other Problems: Here’s How It Works

Apple Watch users can now take a reading of their heart’s electrical signal by holding a finger on the crown of the device.

On Thursday, customers with the Apple Watch Series 4 who install the latest software update can access a new feature to identify atrial fibrillation, a common form of an irregular heart rhythm, as well as opt in to more passive monitoring. 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.