Cardiology is a specialty that deals with the treatment of diseases and disorders of the car-diovascular system. The cardiovascular system consists of the heart, veins and arteries. Cardi-ology also deals with related disorders that af-fect the heart, such as high blood pressure and high cholesterol levels. Diagnosis and treatment of cardiovascular con-ditions range from congenital defects to heart diseases including congestive heart failure and coronary artery disease.