Cardiology is a medical specialty and a branch of internal medicine concerned with disorders of the heart. It deals with the diagnosis and treatment of such conditions as congenital heart defects, coronary artery disease, electrophysiology, heart failure, and valvular heart disease. Subspecialties of the cardiology field include cardiac electrophysiology, echocardiography, interventional cardiology, and nuclear cardiology.
Specialists in cardiology are called cardiologists. Some of the strategies used by cardiologists to combat cardiovascular diseases include coronary artery bypass surgery, percutaneous coronary intervention, percutaneous transluminal angioplasty, and stenting. Cardiologists also may diagnose cardiovascular disorders using blood tests, cardiac stress tests, echocardiography or electrocardiography or computed tomography, and magnetic resonance imaging techniques.