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

It's a common yet uncomfortable sensation when the heart beats rapidly for a second or two and then becomes normal. Whether ...

Tachycardia is the medical term for a heart rate over 100 beats per minute (BPM). It can be a sign of emotional distress or anxiety, anemia (low levels of iron in the blood), infections, dehydration, ...

Researchers followed more than 85,000 adults in the U.K. for about seven years. Women may need less exercise than men to gain similar protection against coronary heart disease, according to a new ...