Atherosclerosis

Atherosclerosis is a slow, complex disease in which fatty substances, cholesterol, cellular waste products, calcium, and other substances build up in the inner lining of an artery. This buildup is called plaque. Atherosclerosis is derived from the Greek words athero (meaning gruel or paste) and sclerosis (meaning hardness). The effects of atherosclerosis differ depending upon which arteries in the body narrow and become clogged with plaque. For example, plaque buildup in the vessels that supply the heart with oxygen-rich blood may cause chest pain and lead to a heart attack while plaque buildup in the arteries that supply blood to the brain may result in a stroke.

According to the Centers for Disease Control, heart disease is the leading cause of illness and death in the United States and most other Western countries. Close to one million deaths per year in the United States alone are attributable to heart disease, double the number of deaths from cancer. Because atherosclerosis is highly preventable and the risk factors are well-documented, preventive measures such as lowering blood pressure and LDL ("bad") cholesterol levels, smoking cessation, losing weight, and increasing physical activity should be followed.