This simple number—often ignored—might be one of the strongest indicators of your heart health, longevity, and overall ...

Add Yahoo as a preferred source to see more of our stories on Google. I receive a lot of emails from readers, which are wide-ranging in topic. Sometimes they're from readers who agree with me while ...

A fast heartbeat can be caused by emotions like stress or anxiety. Dehydration, or drinking caffeine or other stimulants, can ...

Peter Sagan had heart surgery on Friday after doctors determined that he had a heart abnormality that caused his heart rate to spike above 200 beats per minute during a mountain bike race in Valencia.

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...