Coronary-artery disease is a common heart condition that arises from the narrowing of the coronary arteries that supply blood to the heart. Alternate names for coronary-artery disease include ischemic heart disease, atherosclerosis, and angina pectoris. Ischemic heart disease refers to any heart condition that causes reduced blood flow to the heart, resulting in chest pain or heart attack. Atherosclerosis refers to the buildup of plaque within the arteries, which can lead to the narrowing or blockage of blood flow. Angina pectoris refers to the chest pain or discomfort that occurs when the heart's blood supply is reduced. These terms are interchangeable and commonly used in medical settings.