Coronary artery disease is caused by plaque buildup in the wall of the arteries that supply blood to the heart , called coronary arteries, Plaque is made up of cholesterol deposits. Plaque buildup causes the inside of the arteries to narrow over time. This process is called atherosclerosis. To fight back, the body sends white blood cells to trap the cholesterol, which then turn into foamy cells that ooze more fat and cause more inflammation. That triggers muscle cells in the artery wall to multiply and form a cap over the area.
