“Doctors are using the Apple Watch as part of how they diagnose and help their patients manage disease—whether or not it’s been specifically approved for such applications by the Food and Drug Administration or other regulatory bodies.

My own mother, who has a history of atrial fibrillation, a heart-rhythm disorder, is one such patient. The Apple Watch SE she bought on her doctor’s advice has been, by her account, a lifesaving intervention. It allows her to send data gathered by her watch directly to her doctor, as part of the continuing management of her lifestyle and medication.

There’s a large and growing body of research on how the Apple Watch is being used informally in medical care, despite other approved devices being available to track the same metrics.”

From Wall Street Journal.