The 12-lead electrocardiogram device, called the Kardia 12L ECG System, is a hand-held version of the standard ECG device usually found in hospitals and used to diagnose heart conditions.

Now, for those unacquainted with the nuances of cardiology, a standard in the doctor's office is the 12-lead ECG, which is like having a full orchestra compared to the Apple Watch's solo act.

By placing an Apple Watch on different parts of the body, researchers note that the 12-lead ECG could be used to predict whether a heart attack has occurred. The goal isn't to replace a standard ...