SN instructed patient on atherosclerotic heart disease also known as Coronary Artery Disease (CAD); is the damage or disease in the heart's major blood vessels. The usual cause is the buildup of plaque. This causes coronary arteries to narrow, limiting blood flow to the heart. Coronary artery disease can range from no symptoms, to chest pain, to a heart attack. Treatments include lifestyle changes, medications, angioplasty, and surgery.