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'''Bypass Surgery''', or '''Coronary artery bypass grafting''' (CABG), is a type of surgery called revascularization (re-VAS-kyu-lar-i-ZA-shun), used to improve blood flow to the heart in people with severe coronary artery disease (CAD).

'''Bypass Surgery''', or '''Coronary artery bypass grafting''' (CABG), is a type of surgery called revascularization (re-VAS-kyu-lar-i-ZA-shun), used to improve blood flow to the heart in people with severe coronary artery disease (CAD).

CAD occurs when the arteries that supply blood to the [[heart]] muscle (the coronary arteries) become blocked due to the buildup of a material called plaque (plak) on the inside of the blood vessels. If the blockage is severe, chest pain (also called angina), shortness of breath, and, in some cases, [heart attack] can occur.

CAD occurs when the arteries that supply blood to the [[heart]] muscle (the coronary arteries) become blocked due to the buildup of a material called plaque (plak) on the inside of the blood vessels. If the blockage is severe, chest pain (also called angina), shortness of breath, and, in some cases, [[heart attack]] can occur.

CABG is one treatment for CAD. During CABG, a healthy artery or vein from another part of the body is connected, or grafted, to the blocked coronary artery. The grafted artery or vein bypasses (that is, it goes around) the blocked portion of the coronary artery. This new passage routes oxygen-rich blood around the blockage to the heart muscle. As many as four major blocked coronary arteries can be bypassed during one surgery.

CABG is one treatment for CAD. During CABG, a healthy artery or vein from another part of the body is connected, or grafted, to the blocked coronary artery. The grafted artery or vein bypasses (that is, it goes around) the blocked portion of the coronary artery. This new passage routes oxygen-rich blood around the blockage to the heart muscle. As many as four major blocked coronary arteries can be bypassed during one surgery.