|the surgical bypass of a narrowed or blocked coronary artery by grafting a section of a healthy blood vessel taken from another part of the patient's body|
coronary bypass n.
A surgical procedure performed to improve blood supply to the heart by creating new routes for blood flow when one or more of the coronary arteries become obstructed. The surgery involves removing a healthy blood vessel from another part of the body, such as the leg, and grafting it onto the heart to circumvent the blocked artery. Also called coronary bypass surgery.