Bypass surgery is a surgery that reroutes blood around a coronary artery segment that is either completely or partially obstructed. In this procedure, a healthy blood artery is taken from the patient’s leg, arm, or chest and is then connected below and above the blocked arteries in the heart. This improves the blood flow to the heart muscle. Although cardiac conditions that causes the blockage, such as atherosclerosis or coronary artery disease is not cured by coronary bypass