In coronary or heart bypass surgery, the surgeon uses a blood vessel from the leg, arm or chest to bypass a narrowed section of a coronary artery. The surgery can relieve chest pain. A doctor suggests a bypass operation to individuals who’ve been diagnosed with coronary heart disease or angina- that helps improve the blood supply to your heart muscle which helps to relieve angina symptoms and improve the quality of life. Bypass Surgery: The main aim of coronary bypass surgery is to bypass or “get around” the narrowed sections of the coronary arteries that get narrowed when fatty deposits build up on their inner walls. The surgeon grafts a blood vessel between the aorta (the main blood vessel leaving the ticker) and a point along the coronary artery, past the area that’s narrowed. Mostly, at least one of the blood vessels used as a bypass graft is an artery from the chest, known as internal mammary artery. For other grafts, blood vessels like a vein from your legs and sometimes ...