Coronary bypass surgery, also known as coronary artery bypass grafting (CABG), is a medical procedure designed to improve blood flow to the heart muscle when coronary arteries become narrowed or blocked. This condition, often caused by a buildup of fatty deposits (atherosclerosis), can lead to reduced blood supply to the heart, resulting in chest pain (angina) or even a heart attack. During a coronary bypass, a surgeon grafts blood vessels, typically taken from the patient's leg or chest, to bypass the blocked arteries, creating new pathways for blood to reach the heart muscle. This surgical intervention aims to restore proper blood flow, alleviate symptoms, and enhance overall heart function. Coronary bypass is often recommended when other treatments, such as medication or lifestyle changes, prove insufficient in managing coronary artery disease. While it is a major surgical procedure, advancements in medical technology and surgical techniques have significantly improved the safety and success rates of coronary bypass surgeries, making it a crucial option for individuals with advanced coronary artery disease.