Apple and Stanford Medicine announced the results of the Apple Heart Study more than a year after it began.
The Apple Heart Study, which did not include the Apple Watch Series 4 (with its built-in ECG feature), included 419,093 participants. Study results showed 0.5 percent of the over 400,000 participants received an irregular heart rhythm notification, illustrating the feature’s ability to give a user important health information without creating unnecessary burden to their doctor’s schedule.
Just 34 percent of those who received notifications and agreed to wear an ECG patch for a week showed irregularities, but that was expected when atrial fibrillation is intermittent. About 57 percent of those who saw warnings went to a doctor, Stanford added.
Stanford Medicine researchers presented the full findings at the American College of Cardiology’s 68th Annual Scientific Session and Expo in New Orleans, LA.