Coronary artery disease (CAD), also known as coronary heart disease or ischemic heart disease, is the most common type of heart disease.
CAD occurs when plaque, a sticky substance made of fat, cholesterol, cell waste and other materials, builds up in the coronary arteries. These arteries supply your heart with vital blood, oxygen and nutrients. This plaque buildup, also called atherosclerosis, can cause arteries to narrow or harden, restricting blood flow. It can also break off and form clots that block the arteries, leading to a heart attack or stroke.
Coronary artery disease can weaken your heart muscle over time, contributing to many serious heart conditions, including heart failure. It is the number one cause of death in the United States in both men and women. Still, in many cases, you can prevent CAD or slow its progression by making healthy lifestyle changes.