What is the one heart condition a smartwatch can detect?

Last fall Apple introduced the Series 4 Watch with a built-in single-lead electrocardiogram (EKG). When they announced the watch, they also said they received FDA clearance for the EKG function. What does this mean? Apple was not the first company to make an over-the-counter EKG available. Alivecor received FDA clearance in 2014 with a smartphone … Continue reading What is the one heart condition a smartwatch can detect?