As already mentioned, stenting for coronary artery disease does not resolve the risk factors that cause atherosclerosis, and in-stent restenosis may still occur after stenting. So how should I review after stenting to know if there is any restenosis in the stent as early as possible? The first step is to have regular checkups. This includes checking blood pressure, blood sugar, blood lipids, etc. If these indicators are not maintained at a good level, patients have a significantly higher chance of in-stent restenosis. Patients with pre-existing hypertension, diabetes and cerebrovascular disease should pay more attention to the treatment of primary diseases and regular checkups. Even if there is no primary disease, it is important to review every 2 to 3 months and take active treatment measures if the index is higher than the normal range. Among these examinations, the examination of lipids after cardiac stenting is relatively important. The most critical of the lipid abnormalities is the elevation of total cholesterol or LDL cholesterol. When total cholesterol is >5.2 mmol/L and LDL cholesterol is >3.4 mmol/L, medication should be started. Lipids should be reduced to total cholesterol <4.68mmol/L and LDL cholesterol <2.60mmol/L, while LDL should be controlled below 2.0mmol/L in patients after stent implantation. Statin lipid-lowering drugs need to be taken for a long time to benefit, and current clinical studies show that statin lipid-lowering drug treatment for 3-5 years can significantly reduce mortality. Secondly, patients should adhere to the medication and pay attention to self-observation. On the one hand, if chest tightness and chest pain occur again after stenting, you should go to the hospital promptly, especially within one month after surgery to be alert to the thrombosis in the stent into energy, to the hospital to check the electrocardiogram, cardiac ultrasound, myocardial enzyme spectrum, etc. If there are abnormal test results, doctors will generally progress the examination, such as the need for coronary angiography again to clarify the situation in the stent. On the other hand, after stent surgery, it is often necessary to take more kinds and quantities of drugs, so you should pay attention to any adverse reactions. If symptoms such as skin or gastrointestinal bleeding, fatigue and weakness occur, you should bring the discharge summary and the information of the drugs taken to the hospital as soon as possible. The adverse effects of taking statins are liver function damage and rhabdomyolysis. Therefore, when taking statins, you should also pay attention to reviewing liver function and muscle enzymes to see if there are any adverse effects in this regard. After stenting, it is generally recommended to review the coronary angiogram within 6-9 months after the intervention. Nowadays, the use of 64-row or even 128-row CT is becoming more and more widespread, so if there are no abnormalities such as chest pain, relatively few non-left trunk lesions or stent implantation, and if the postoperative medication is standardized, the blood lipids are well controlled, and there are no abnormal changes on the electrocardiogram, then it is not particularly important to go to the hospital to review the coronary angiogram, but to do a coronary spiral CT to review the coronary arteries. Coronary artery is also possible, after all, it is non-invasive and can be roughly substituted, in addition, the price is also slightly lower, but if the coronary CT suggests the possibility of stenosis in the stent, then further coronary artery examination should be performed. If in-stent restenosis occurs after stent implantation, patients do not have to be overly nervous. There are several treatments available after restenosis occurs, depending on the lesion and clinical situation, with options such as balloon dilation again (including cutting the balloon), stent reimplantation, and some patients may need surgical bypass.