The difference between coronary atherosclerosis and coronary heart disease is as follows: 1. Coronary atherosclerosis: refers to the coronary arteries already have atherosclerotic lesions, manifested as intima-media lipid deposition, plaque formation, etc. The lesion is the degree of stenosis within 50%, which does not cause ischemic symptoms and dysfunction of the heart, and can be commonly understood as the pre-coronary artery disease, which is lighter than the lesion of coronary artery disease. This condition does not require stent placement and bypass treatment, but requires non-pharmacological treatment plus pharmacological treatment, timely intervention to prevent further development of the lesion to the stage of cardiac ischemia; 2. It is usually considered that atherosclerosis with a degree of stenosis of more than 50% causes ischemic symptoms, so stenosis due to atherosclerosis of more than 50% of coronary arteries is called coronary heart disease. If the degree of stenosis has exceeded 70% and there are also ischemic symptoms, not only non-pharmacological and pharmacological treatments are needed, but also active revascularization treatments, such as stent placement and bypass surgery, and long-term non-pharmacological and pharmacological interventions after stent installation and bypass surgery are performed.