Coronary artery disease is the narrowing or blockage of the coronary arteries, for the most part brought about by atherosclerosis. Atherosclerosis (once in a while called "solidifying" or "clogging" of the courses) is the development of cholesterol and greasy stores (called plaques) on the inward dividers of the supply routes. These plaques can limit blood stream to the heart muscle by physically obstructing the supply route or by causing irregular conduit tone and capacity. Without a satisfactory blood supply, the heart gets kept from oxygen and the fundamental supplements it needs to work appropriately. This can cause chest torment called angina. In the event that blood supply to a bit of the heart muscle is cut off completely, or if the vitality requests of the heart become a lot more prominent than its blood supply, a heart attack (damage to the heart muscle) may happen.