A heart rhythm specialist explains how electrical signals keep the heart beating—and how wearables are helping detect ...

Heart rhythm disorder is no longer just for the elderly. Here's what you need to know about atrial fibrillation, or AFib.

An irregular heartbeat could signal a heart rhythm disorder, also known as an arrhythmia. Experts urge those affected to get treated early to avoid serious complications.

Atrial fibrillation (AFib) is an irregular and often very rapid heart rhythm, also called an arrhythmia and can create blood clots in the heart, which can increase your risk of having a stroke by five ...

A-fib occurs when the heart’s upper chambers, called the atria, beat out of sync with the lower chambers, the ventricles.