Cardiothoracic surgery is a medical specialty that focuses on surgical procedures involving the heart and lungs, as well as other structures in the chest cavity. Specialists in this field address serious conditions such as coronary artery disease, congenital heart defects, and lung cancer. Common procedures include coronary artery bypass grafting (CABG) to bypass blocked coronary arteries, heart valve replacement to repair or replace damaged heart valves, and lobectomy or pneumonectomy to remove parts of or the entire lung affected by cancer. Cardiothoracic surgery is also used to repair aortic aneurysms, which are dangerous enlargements of the aorta's wall, and to treat pleural disorders like pleural effusion. Cardiothoracic surgeons work closely with cardiologists and pulmonologists to provide comprehensive care, from diagnosis to postoperative recovery.