The average human heart beats about 100,000 times a day, pumping almost 2,000 gallons of blood through the body. What makes it tick so precisely? An electrical system that creates impulses to control ...

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 ...

Signs of an irregular heartbeat: A rapid or slow heartbeat can be dangerous for our health. Let us explain how dangerous it ...

Your heart has been doing its job faithfully for years, beating steadily in the background while you go about your daily life. Then suddenly, you become acutely aware of every beat as it seems to ...

Bigeminy is an irregular heart rhythm where every normal beat is followed by an abnormal one. You should see a doctor if bigeminy causes dizziness, chest pain, or trouble breathing. Bigeminy can be ...

Researchers have discovered that microscopic structural changes in the aging heart may help prevent irregular heartbeats. The discovery challenges the idea that all age-related heart changes are ...

Many arrhythmias have no clear cause; these idiopathic cases arise without identifiable triggers, while for others, the causes may be congenital or acquired.

The heart is a muscle about the size of your fist that pumps blood around the body. When the heart is functioning properly, it has a specific rhythm controlled by a mass of specialized heart tissue ...

Multifocal atrial arrhythmia is an uncommon type of tachycardia that usually develops in people with certain illnesses. Those with the condition have a heart rate of over 100 beats per minute.

Question: I'd like to learn more about supraventricular tachycardia. I've been told a couple of different views on this and it's very unsettling. My condition scares me at times. On several occasions, ...

Be merry and bright, but beware of your heart having a fright. The holiday season means plenty of parties — and plenty of stress. Behind the cheer and chaos could lurk a dangerous heart issue waiting ...