The length of life of patients with coronary atherosclerosis is related to the degree of coronary artery stenosis, whether they receive timely and effective treatment, their living habits, and whether there is damage to the heart muscle, and other factors, which cannot be generalized. Coronary atherosclerosis will lead to narrowing of the coronary artery lumen, and when the narrowing reaches a certain level, the myocardium will suffer from ischemia and hypoxia, or even necrosis, which will affect the function of the myocardium and may eventually lead to sudden death. If the narrowing of coronary artery lumen is less than 50% due to coronary atherosclerosis, life expectancy will not be affected if the patient improves his or her lifestyle habits and takes medication under the guidance of a cardiologist. If the stenosis of the coronary artery is severe, such as 90% stenosis of the anterior descending branch, and the myocardium is not treated with blood flow reconstruction in time, it will shorten the life span of the patient and even cause sudden death. In addition, coronary atherosclerosis is usually not reversible, but can only be prevented from progressing, so medications should be taken in a timely manner under the guidance of a cardiologist and lifestyle habits should be improved.