Coronary or ‘heart’ bypass surgery is an open-heart surgical
procedure that restores blood flow to your heart muscle by diverting the
flow of blood around a section of a blocked artery in your heart. Bypass
surgery uses a healthy blood vessel taken from your leg, arm, chest or
abdomen and connects it to the other arteries in your heart so that blood
is bypassed around the diseased or blocked area. After a coronary bypass
surgery, normal blood flow to the heart is restored.