A 50% stenosis of the anterior descending branch of the left coronary artery can be diagnosed as coronary artery disease, which is a moderate stenosis, not too serious. Generally, for patients with greater than 75% stenosis of the anterior descending branch of the coronary artery, coronary stent intervention is recommended, while for patients with 50%-75% stenosis of the anterior descending branch, drug conservative treatment is recommended. Usually, after the diagnosis of coronary artery disease is made, patients are advised to take medication for life, usually antiplatelet aggregation such as aspirin or clopidogrel, lipid-lowering and plaque stabilization such as atorvastatin or rasulvastatin, and other secondary prevention medications for coronary artery disease. Patients are advised to have a low-fat diet, avoid straining, maintain a relaxed mood, and take appropriate physical exercise, as well as pay attention to a good lifestyle to prevent further narrowing of coronary vessels.