Heart bypass surgery, also known as coronary artery bypass grafting (CABG), is a procedure that improves blood flow to the heart. It is performed when the coronary arteries become narrowed or blocked due to atherosclerosis, which can lead to chest pain or heart attacks. During the surgery, a surgeon takes a healthy blood vessel from another part of the body and uses it to create a new pathway for blood to flow around the blocked artery. The surgery is typically done under general anesthesia and may require a hospital stay of several days. Recovery can take several weeks, during which patients are encouraged to follow a heart-healthy lifestyle, including a balanced diet and regular exercise, to improve their overall heart health.