Apple Watch 4 Adds ECG, EKG, and More Heart-Monitoring Capabilities

The new Apple Watch Series 4, revealed by Apple earlier today, underscores that some of the watch's most important features are its health and fitness-tracking functions. The new watch is one of the first over-the-counter devices in the US to offer electrocardiogram, or ECG, readings. On top of that, the Apple Watch has received FDA clearance—both for the ECG feature and another new feature that detects atrial fibrillation.