Coronary heart disease, officially called coronary atherosclerotic heart disease, is mainly caused by long-term elevated blood lipids, leading to arteriosclerosis, reduced elasticity in arterial walls, and thickening of the inner layer of blood vessels. This results in the narrowing of the coronary arteries and insufficient blood supply, which are the primary causes of coronary heart disease. Prolonged insufficient blood supply in the coronary arteries and severe narrowing can lead to angina and even myocardial infarction, posing significant risks to the body.