Coronary Artery Disease (CAD), often referred to as Coronary Heart Disease (CHD) or Atherosclerosis, affects the vessels that supply blood to the heart muscle.
It occurs when there is a narrowing of the small blood vessels that supply blood and oxygen to the heart. Deposits of calcium, fat, cholesterol and fibrous tissues, are the primary causes of CAD, as it make the lumen of arteries narrower.
The most common cause is the buildup of plaque (a fatty substance) in the arteries to human heart which restricts the flow of blood.
Coronary artery disease may be treated with medication, angioplasty, coronary artery bypass surgery.