You're curled up on the couch, finally relaxing after a long day when suddenly, your heart starts racing. You're obviously ...

Your heart beats about 100,000 times a day. Sometimes it beats faster and sometimes more slowly, depending on what you're doing and whether, for instance, you're all worked up about something. So ...

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 ...

In atrial fibrillation, the heartbeat is very irregular and often fast. Doctors use medicines to control both the speed and ...

To continue reading this content, please enable JavaScript in your browser settings and refresh this page. The heart is an incredible machine, pumping blood to fuel ...

Sitting quietly at your desk, watching TV, or lying in bed at night, your heart should be taking it easy – beating steadily and calmly at somewhere between 60 and 80 beats per minute for most healthy ...

Sudden cardiac arrest may occur in various conditions when someone, while active (playing basketball or walking with friends), collapses and passes out. Their blood pressure drops, and often their ...