If the heart is blocked again after bypass grafting, coronary angiography should be carried out, and according to the type and degree of blockage, medication, bypass grafting or implantation of stent measures should be taken. 1. Drug treatment: If the coronary angiography test of heart bypass suggests that the degree of stenosis is not serious and the symptoms are not obvious, you can follow the doctor’s instructions to use anticoagulant and antiplatelet drugs, such as heparin, clopidogrel, aspirin and so on, and you can also take vasodilator drugs, such as isosorbide mononitrate and so on. However, if the effect of drugs is not good, we need to consider surgery in time. 2. Other blockages: If there is no blockage of the saphenous vein or the internal mammary artery used in the bypass, but other blood vessels are blocked, intervention is recommended. A stent can be implanted to relieve the localized stenosis, thus relieving myocardial ischemia. 3. Re-bypass: If the stenosis is in the bridge vessel, and the bypass vessel cannot be operated, then re-bypass should be considered; if it is a blockage of other blood vessels, but it is not possible to implant a stent, then re-bypass can also be considered. It is important to monitor your condition and follow up regularly after heart bypass surgery. Any abnormalities should be treated promptly.