Patients with coronary artery disease need to maintain a healthy lifestyle for a long time and adhere to standardized treatment, as well as regular follow-up examinations to understand the effect of treatment and rehabilitation as well as the safety of treatment measures. 1, blood routine: patients with coronary heart disease need to take long-term B-blockers, nitrates, lipid-regulating drugs, anti-platelet drugs and other drugs, which may affect white blood cells, platelets and hemoglobin, etc., so patients with coronary heart disease should review the blood routine. 2.Urinary routine: Patients with coronary heart disease are mostly combined with hypertension, diabetes, etc. These diseases can cause kidney damage, proteinuria, etc., plus the impact of drugs, so it is necessary to test urinary routine to understand the occurrence of kidney damage. 3, fecal occult blood: patients with coronary artery disease need to take aspirin for a long time, and patients with stent implantation have to combine the application of clopidogrel, so there is a risk of gastrointestinal bleeding, especially patients with original combined gastrointestinal diseases such as ulcer disease and patients with a history of alcohol consumption. In addition to the instructions to pay attention to the gastrointestinal symptoms and observe the presence of black stool, it is best to regularly review the stool occult blood, once the occult blood is positive to determine the cause, location and amount of bleeding, pay attention to the addition of gastrointestinal mucosa protective agents or reduce the amount of relevant drugs to avoid gastrointestinal hemorrhage. 4.Electrocardiogram: Regular review of electrocardiogram can detect any new myocardial ischemia, arrhythmia and other conditions early. Especially when patients have symptoms, they should be reviewed in a timely manner. 5.Liver and kidney function: Numerous drugs and combined diseases may cause liver and kidney function damage, so liver and kidney function needs to be tested. Statin is a mandatory drug for patients with coronary heart disease. Statin is metabolized in the liver, and the possible side effects are elevated transaminases and rhabdomyolysis, especially when initially taken, liver function should be tested to understand the level of transaminases and creatine creatinase, and as a reference for future review. 6.Glucose and lipid: high blood sugar and high blood lipid are important risk factors of coronary heart disease, and the treatment of coronary heart disease requires control of blood sugar and lipid to make it reach the standard, which requires regular rechecking of blood sugar and lipid. In view of the volatility of random blood glucose and many influencing factors, glycated hemoglobin can be checked. 7, echocardiography: regular review of echocardiography in patients with coronary artery disease can understand the size, morphology, ventricular wall thickness and motion, valve structure and function, etc., which is important for evaluating the overall structure and function of the patient’s heart and whether there is recurrent myocardial ischemia. 8.Load test: Exercise load ECG test is an effective way to evaluate the recurrence of myocardial ischemia or activity tolerance. 9.Nuclear myocardial perfusion imaging: nuclear myocardial perfusion imaging is a valuable non-invasive examination method for the diagnosis of coronary artery disease, the assessment of the degree and extent of coronary lesions, the estimation of surviving myocardium, the evaluation of cardiac function and the estimation of the efficacy and prognosis of coronary heart patients. 10.Coronary CT: Multi-row CT coronary imaging is a good method for non-invasive detection of coronary stenosis. However, it is prone to errors in calcified lesions and vascular tortuosity, and stents also have some influence on imaging, so the evaluation value for in-stent restenosis is limited. 11.Coronary angiography: In patients with recurrent myocardial ischemia, coronary angiography can be done to clarify the lesion of the coronary artery causing ischemia. Coronary angiography can clearly show the anatomy of the coronary artery, make accurate judgment on the characteristics of the original lesion and the new lesion, and also make accurate evaluation of whether there is restenosis in the stent. However, coronary angiography is not necessary if the patient’s comprehensive condition does not permit or if he/she is not prepared for blood flow reconstruction (bypass surgery or intervention).