Cardiovascular system refers to a system of vessels that convey blood to and from tissues throughout the body, bringing nutrients and oxygen and removing wastes and carbon dioxide. It is essentially a long, closed tube through which blood moves in a double circuit-one through the lungs (pulmonary circulation) and one through the rest of the body (systemic circulation). The heart pumps blood through the arteries, which branch into smaller arterioles, which feed into microscopic capillaries (artery; capillary). These converge to form small venules, which join to become larger veins, generally following the same path as the arteries back to the heart. Cardiovascular diseases include atherosclerosis, congenital and rheumatic heart disease and vascular inflammation.

Cardiovascular System is an organ system that moves substances to and from cells. It help stabilize body temperature and pH. Cardiovascular disease refers to the class of diseases that involve the heart and/or blood vessels (arteries and veins).

Carotid artery stenting is a procedure in which vascular surgeon inserts a slender, metal-mesh tube, called a stent, which expands inside the carotid artery to increase blood flow in areas blocked by plaque. Carotid artery stenting is a treatment method for carotid artery disease.