For nearly a century, the electrocardiogram has demanded an awkward ritual: ten electrodes, a tangle of wires, and a patient stripped to the waist and pinned to a bed. That ritual has kept the most ...

Twelve-lead ECGs, although standard in hospitals, can be bulky and impractical for home use. On the other hand, Apple Watch’s ECG app is easy to use, but it is limited in what it can detect because it ...