Researchers from the Stanford University School of Medicine presented preliminary results of the Apple Heart Study, a virtual study with over 400,000 enrolled participants, at the American College of Cardiology (ACC) 68th Annual Scientific Sessions, March 16-18 in New Orleans. The researchers reported that wearable technology can safely identify heart rate irregularities that subsequent testing confirmed to be atrial fibrillation, a leading cause of stroke and hospitalization in the United States.