Whether cardiac atherosclerosis is serious or not depends on the degree of narrowing of blood vessels caused by cardiac atherosclerosis. Cardiac atherosclerosis refers to the heart arterial vascular lining with plaque, in general, coronary angiography suggests that there is coronary vascular plaque, coronary artery stenosis in less than 50%, diagnosed as coronary atherosclerosis, and can not be diagnosed as coronary heart disease, the danger of this situation is not great, and is not serious. If the heart coronary atherosclerosis is serious, resulting in coronary artery vascular stenosis of more than 50%, the diagnosis of coronary heart disease, coronary artery stenosis of 50%-70%, it is recommended that oral secondary prevention of coronary heart disease drugs. If the coronary artery stenosis is more than 75%, coronary stenting is recommended. If the stenosis is greater than 90%, it is a severe stenosis, and acute myocardial infarction can occur at any time, which is very serious.