CPT® Code 33536

Coronary artery bypass graft (CABG) surgery is a critical procedure aimed at restoring blood flow to the heart by bypassing narrowed or blocked coronary arteries. The coronary arteries are essential as they supply oxygen and nutrients to the heart muscle. When these arteries become narrowed or blocked due to conditions such as atherosclerosis, it can lead to ischemic heart disease and potentially result in a myocardial infarction, commonly known as a heart attack. The CABG procedure involves the use of arterial grafts to reroute blood around the obstructed arteries, thereby improving blood flow to the heart. During the surgery, one or more arteries are harvested from the patient's body, with common sources including the internal mammary artery (IMA), the inferior epigastric artery (IEA), and the radial artery. These grafts can be harvested as pedicle grafts, which include surrounding tissues, or skeletonized, where all surrounding tissues are removed, leaving only the outer layer of the graft. The surgical approach typically involves a median sternotomy to access the thoracic cavity, allowing for the careful dissection and preparation of the grafts. The procedure can be performed using either an off-pump technique, where the heart continues to beat during surgery, or a cardiopulmonary bypass technique, where the heart is temporarily stopped and the patient is connected to a heart-lung machine. The ultimate goal of CABG is to enhance blood flow to the heart muscle, alleviate symptoms of coronary artery disease, and reduce the risk of future cardiac events.