Patients undergoing interventional therapy for coronary artery disease have the most dangerous lesions of coronary artery disease eliminated by the procedure, but the coronary artery disease itself has not been completely eliminated, and the following aspects should also be noted after interventional therapy. First of all, anticoagulant and antiplatelet drugs should be applied to prevent restenosis after the intervention procedure. Antiplatelet drugs include aspirin and clopidogrel, clopidogrel should be taken for more than one year, aspirin can be taken for life, and should be used for long-term lipid-lowering drugs, such as blood pressure for patients with heart attack should be taken for a long time betalactam and ACEI drugs. Why should we take lipid-lowering drugs for a long time? 1.To delay or prevent the formation of new atherosclerotic plaques. Reduce the size of original atherosclerotic plaque. 3.Prevent restenosis after PTCA.