Coronary Artery Disease (CAD), also known as coronary atherosclerotic heart disease, is the most common type of heart disease in the United States. Coronary artery disease (CAD) is the most common type of heart disease and is the leading cause of death for both men and women in the U.S. With the economic development of China and the improvement of people’s living standards, coronary artery disease has also become the leading cause of death among our residents. Coronary heart disease occurs when the lumen of the blood vessels supplying the heart muscle becomes narrowed locally due to lesions, resulting in reduced blood supply to the heart muscle. This is mainly due to the fact that cholesterol and other substances in the blood are deposited under the inner walls of the blood vessel walls over the years, forming localized protrusions called plaques. As plaque develops, it can cause narrowing of the lumen of the blood vessels, which can reduce the blood supply to the coronary arteries, especially when the need for blood and oxygen supply increases after activity, because the narrowing of the coronary arteries caused by coronary heart disease prevents a corresponding increase in blood supply. As a result, some of the affected heart muscles do not receive the appropriate amount of blood or oxygen. This may lead to chest pain (angina) or a heart attack. Some heart attacks occur when a blood clot forms on the surface of an existing narrowed blood vessel causing a sudden interruption in the blood supply to the heart, which can result in permanent heart damage, also known as myocardial infarction. Over time, the walls of the heart affected by coronary artery disease become weakened and can cause heart failure and arrhythmias. Heart failure is when the heart cannot pump blood well to other parts of the body, and arrhythmia is when the heart loses its normal beating rhythm and becomes disrupted.