MODEL RELEASED. Triple bypass heart surgery. Surgeon in an operating theatre completes a triple coronary bypass on the heart of a male patient. The surgeon is suturing the site of incision to close up the chest wall; magnifying lenses are seen on his glasses. Tubes lead from the patient's chest. Coronary bypass surgery restores the blood supply to the heart muscle in patients with coronary heart disease. Parts of the coronary arteries, blocked by fatty plaques, are bypassed by grafts of veins usually taken from the leg. The improved blood flow to the heart muscle relieves angina and reduces the risk of heart attack.