The new $399-and-up Apple Watch will be able to measure the electrical activity of your heart, its groundbreaking ECG or EKG feature. (Both acronyms stand for “electrocardiogram.”) But there are some important caveats.
The new $399-and-up Apple Watch will be able to measure the electrical activity of your heart, its groundbreaking ECG or EKG feature. (Both acronyms stand for “electrocardiogram.”) But there are some important caveats.