This surgery is used to improve blood flow to the heart in people with coronary artery disease. It involves taking a healthy blood vessel from another part of the body and using it to bypass a blocked or narrowed coronary artery. This creates a new path for oxygen-rich blood to reach the heart muscle, helping it to relieve chest pain, improve heart function, and reduce the risk of heart attack. Bypass surgery is one of the most common heart surgeries, typically recommended when lifestyle changes, medications, or less invasive procedures are not sufficient.