Cardiology Demo Reel:

car·di·ol·o·gy The medical specialty responsible for the studying the structure, function and treating the disorders of the human heart.

Wikipedia: Cardiology is a medical specialty dealing with disorders of the heart (specifically the human heart). The field includes medical diagnosis and treatment of congenital heart defects, coronary artery disease, heart failure, valvular heart disease and electrophysiology. Physicians who specialize in this field of medicine are called cardiologists. Physicians who specialize in cardiac surgery are called cardiac surgeons.