Coronary bypass is a surgical procedure used to improve blood flow to the heart. It involves creating a new pathway for blood to bypass blocked or narrowed arteries, often using a blood vessel taken from another part of the body, such as the leg or chest. This helps to relieve symptoms of heart disease, such as chest pain and shortness of breath. During the procedure, the surgeon makes an incision in the chest to access the heart. The new blood vessel is then attached to the coronary artery, allowing blood to flow around the blockage. This surgery can significantly improve heart function and quality of life for patients with severe coronary artery disease.