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

You know the feeling. When you first see your crush and your head starts spinning, your palms get sweaty, and your heart begins beating a mile a minute. Is this love? Or is it … an arrhythmia? The ...

Once you cross age 40, you have a 1 in 4 chance of developing AFib. The Heart Rhythm Society says atrial fibrillation is the most common type of cardiac arrhythmia. A heart beating too fast, too slow ...

A heart that beats too fast can leave you lightheaded, dizzy, out of breath or feeling fatigued.

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 ...