Located almost in the center of the chest, the adult human heart is about the size of two fists held side-by-side.
The heart is a pump made of muscle tissue. Its pumping action is regulated by electrical impulses.
Coronary arteries supply blood to the heart muscle. There are two main coronary arteries: the right and the left.
Detailed anatomical description of the heart valves, including simple definitions and a labeled, full-color illustration
A cardiologist is a doctor who has had extra training to treat problems of the heart and blood vessels. These include heart attack and heart failure.
A clinical cardiac electrophysiologist, or cardiac EP, is a doctor who treats rhythm problems of the heart.