JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Coronary artery disease. Illustration of a human heart showing narrowing of the coronary artery due to atherosclerosis - build up of fatty deposits (atheroma, yellow). The large red vessel is the aorta, the main artery carrying blood from the heart to the body. To its left is the vena cava (blue), which carries blood back to the heart. The forked vessel under the aorta is the pulmonary artery, which carries blood to the lungs. Coronary artery disease is the most common cause of death in developed countries. The condition leads to abnormal clotting in the narrowed artery, which blocks the vessel and starves the heart's muscle of blood, causing heart attack.
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