Coronary artery disease (CAD) is a common heart disease that occurs when the arteries that supply blood to the heart narrow. This narrowing is caused by a buildup of plaque in the arteries, which can reduce or block blood flow to the heart. Calcium deposits (Arterial Plaque) in the heart arteries and inflammation are usually the cause of coronary artery disease.
https://www.mayoclinic.org/diseases-conditions/coronary-artery-disease/symptoms-causes/syc-20350613