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.

Add Yahoo as a preferred source to see more of our stories on Google. A sudden onset of irregular heart rhythms can be disorienting. wildpixel/iStock via Getty Images Plus Atrial fibrillation, or ...

WASHINGTON - Scientists have discovered the molecular cause of a lethal type of irregular heartbeat and a drug that seems able to prevent it, a finding that might one day save hundreds of thousands of ...

Wearable health devices such as smartwatches and bands are more than fitness trackers. Many also can monitor your cardiovascular health. Some wearables can highlight problems such as irregular heart ...

Signs of an irregular heartbeat: A rapid or slow heartbeat can be dangerous for our health. Let us explain how dangerous it ...

If you've ever felt your heart suddenly start thumping faster than it should, you're not alone. Research in the New England Journal of Medicine shows that at some point up to 75 percent of us ...

Virginia Tech Professor Steven Poelzing (at right) led a study published in the journal JACC Clinical Electrophysiology that challenges the idea that all age-related changes in the heart are harmful.

Atrial fibrillation, or A-fib, is an irregular heart rhythm that increases a person's risk of stroke, heart failure and even premature death. While many risk factors contribute to A-fib, one stands ...