DefinitionCoronary Heart disease (CHD) is a narrowing of the small blood vessels that supply blood and oxygen to the heart. CHD is also called coronary artery disease.See also:AnginaHeart attackUnstable anginaAlternative NamesCoronary artery disease; Arteriosclerotic heart disease; CHD; CADCauses, incidence, and risk factorsCoronary heart disease is usually caused by a condition called atherosclerosis, which occurs when fatty material and a substance called plaque build up on the walls of your arteries. This causes them to get narrow. As the coronary arteries narrow, blood flow to the heart can slow down or stop. This can cause chest pain (stable angina), shortness of breath, heart attack, and other symptoms.Coronary heart disease (CHD) is the leading cause of death in the United States fo