Apple Watch releases heart monitor function

The new function on the Apple Watch Series 4 became available last week.

While it can't detect all heart rhythm abnormalities or detect a heart attack, it can help detect a condition known as atrial fibrillation.

That's when a person feels something similar to a fluttering in their chest.

It's the second most common cause of death around the world.

Once the function is set up through a software update, the results can be shared with your doctor.

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