1.How long is the review after surgery? If there are no special circumstances, a follow-up checkup can be done 3 to 6 months after surgery, and if there is any discomfort, visit the hospital at any time. Usually, cardiac ultrasound, electrocardiogram and chest X-ray are reviewed in 3 to 6 months, and a full set of biochemical tests are taken to check the blood lipid level in patients with coronary artery disease, and anticoagulation tests are added for patients with valves. Patients with coronary artery bypass surgery can consider coronary CT after 1 year to review whether the coronary artery bypass (which is usually called bridge) is open. 2.What should I do if my legs are swollen after coronary artery bypass grafting (heart bypass surgery)? First of all, it depends on whether the leg is swollen or not. The leg with blood vessel is swollen because the main blood vessel (saphenous vein) for blood return is gone, which will cause poor blood return and lead to water stagnation in soft tissue. Most of this condition will resolve on its own in 3-6 months. However, it can reappear or worsen after activity. Usually, elevating the affected limbs at rest can speed up blood flow and reduce lower limb edema. If both lower extremities are edematous, including the legs without blood vessels, it is necessary to see whether the patient’s comprehensive situation is due to cardiac insufficiency, and to strengthen diuretic potassium supplementation in time. 3.How long can patients with myocardial infarction complicated by coronary heart disease be operated? It is usually controlled after 4 weeks, which can reduce the chance of poor cardiac function and arrhythmia after surgery. 4.How long after cerebral infarction can I have surgery? Usually after 3 months after the infarction occurs. 5.What kind of medicine do I usually take with me when I leave the hospital? Discharge medications for coronary artery bypass surgery: ① aspirin: anticoagulant; ② isosorbide mononitrate: dilates coronary arteries; ③ atenolol: slows heart rate; ④ simvastatin: lowers blood lipid level. Valve surgery discharge with drugs: ① warfarin: prevent thrombosis blocking the prosthetic valve; ② furosemide: diuretic, reduce the burden on the heart; ③ digoxin: slow down the heartbeat, toxic can not be overdosed; ④ slow-release potassium: and diuretic combined application, supplement the excreted potassium ions. ⑤ Torasemide: diuretic drug, currently more commonly used. 6.What is the difference between biological flap and mechanical flap? Briefly, the biological valve has a short life span, about 15 years, and the age has a great impact on the life span of the biological valve. The intensity of anticoagulation should be monitored by regular INR (International Standard Ratio) checks. Generally, patients over 65 years of age are recommended to have a biological valve; patients under 60 years of age are recommended to have a mechanical valve. Special circumstances such as pregnancy, remote residence without anticoagulation monitoring, etc. can be considered. The mechanical valve is stable and is currently the most used prosthetic valve; with the advancement of biologic valve technology, its use will become more widespread.