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.

Cardiovascular system

The basic functioning of the cardiovascular system includes the way the heart processes oxygen and nutrients in the blood, which is called coronary circulation. The circulation system consists of coronary arteries and coronary veins.