Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns ...

Carotid artery disease is similar to coronary artery disease, in which blockages occur in the arteries of the heart ... arteries deliver blood to the brain, carotid artery disease can have serious ...

Originally appeared on the NOVA Web site Cut to the Heart. Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and ...