Study: Apple Watch highly accurate at detecting irregular heartbeats
<p>A new study from University of California, San Francisco, researchers shows that the Apple Watch can <a target="_blank" href="https://www.wsj.com/articles/smartwatch-shows-promise-in-detecting-heart-problem-1521644401?mod=pls_whats_news_us_business_f" rel="noopener noreferrer">detect atrial fibrillation</a> with high accuracy at least when wearers were at rest. </p>