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.

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 seven-year-old Iraqi boy suffering from persistent, fast heart rhythm with fatal consequences successfully underwent a life-saving procedure at a hospital here amid extreme caution owing to his ...

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

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 ...