Chest pain or palpitations can signal hidden heart trouble. Know when an ECG test is needed, what results show, and when to seek urgent care.

An NHS test to assess a patient's risk of heart attack is worthless, a study has found. The electrocardiogram, which records the electrical impulses produced by a heart's rhythm, is not accurate ...

The Apple Watch Series 4's transformation from miniature iPhone and fitness tracker to medical device is now complete with the release of the ECG (electrocardiogram) app and irregular heart rhythm ...