Coronary artery disease (CAD) is the most common type of heart disease. In CAD the coronary arteries (tubes) that take blood to the heart are narrow or blocked. This happens when cholesterol, plaque , calcium deposits build up inside the arteries.
Plaque is caused by:
- Fat and cholesterol in the blood
- High blood pressure
- Too much sugar in the blood (usually because of diabetes)
When plaque blocks an artery, it’s hard for blood to flow to the heart. A blocked artery can cause chest pain or a heart attack