Heart surgery. Bypass surgery is an operation in which surgeons create a bypass to allow blood to go around blockages in the arteries. To accomplish a bypass, surgeons use a graft - a blood vessel from the leg or chest. With the graft in place, blood can now flow freely to the heart muscle, bypassing the blocked or narrowed section of the artery. A week's stay in the hospital is usually necessary afterwards.
Blood detour. Bypass surgery is a procedure where a graft (an artery or vein from another part of your body, or else an artificial tube) is used to divert blood around a blockage in a blood vessel ... Coronary bypass surgery is such an operation for blockages in arteries that feed your heart ... But any blood vessel in your body can be bypassed if blocked.