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What is coronary heart disease?

According to the Center for Disease Control:

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. Coronary artery disease (CAD) is the most common type of heart disease in the United States. For some people, the first sign of CAD is a heart attack. You and your health care team may be able to help you reduce your risk for CAD.

Causes of CAD
Too much plaque buildup and narrowed artery walls can make it harder for blood to flow through your body. When your heart muscle doesn’t get enough blood, you may have chest pain or discomfort, called angina. Angina is the most common symptom of CAD. Over time, CAD can weaken the heart muscle. This may lead to heart failure, a serious condition where the heart can’t pump blood the way that it should. An irregular heartbeat, or arrhythmia, also can develop.