For coronary heart disease myocardial infarction and unstable angina drug treatment is not ideal patients will face a problem: the doctor said that the need to put a stent, put a stent will not have any “sequelae”? Will there be any bad effects? Understanding stents: Stents are mesh-like supports made of stainless steel, nickel-titanium alloy or cobalt-chromium alloy, and there are also biodegradable stents, but their clinical safety and long-term effects have yet to be further observed and researched. Stents are equivalent to a physical support, through the expansion force of the stent itself, support the intima or interlayer of the vessel, so that it is pressed against the vessel wall, to treat and prevent restenosis or even occlusion of the vessel due to the collapse of the intima or elastic retraction of the wall. Stent implantation is only a means of emergency treatment, in order to open the occluded or severely narrowed blood vessels as soon as possible, and cannot cure coronary atherosclerosis fundamentally, and after implantation of the stent, it is still necessary to continue the drug treatment, and it is still necessary to improve the lifestyle, which is a point that needs to be re-emphasized. Changes after stent implantation: A few hours after the stent is implanted into the vessel, a thin layer of fibroblasts and platelet deposits will form on the surface of the stent. At 1 week after the procedure, the fibroblast and platelet deposits on the stent surface are more pronounced, forming a thin layer of thrombus with small pieces of neovascularized endothelium within the thrombus. The thrombus tissue was replaced by cells at about 2 weeks postprocedure, and the neovascular intima continued to grow. The stent was essentially covered by the neovascular intima around 4 weeks after the procedure. At about 8 weeks after the procedure, the thickness of the neovascularization increases to 0.2-0.5 mm and then gradually thins. At about 6 months after the procedure, the stent is covered by stable intima. This means that the stent will eventually be covered by the vessel intima. Some patients ask if the stent can be removed, and the answer is no. Effects on the body after stent implantation: 1. Stronger antiplatelet therapy is needed after stent implantation to prevent the formation of thrombus in the stent, commonly used clopidogrel and tegretol, which can be discontinued after about one year of application in general, and some scholars believe that the intensive therapy can be discontinued after about six months. The basic treatment of coronary heart disease (aspirin, statin) needs to be maintained for a long time. 2. After stent implantation, a small number of people will experience a foreign body sensation, which will usually disappear gradually, and some discomfort may remain. 3. If there is no active drug treatment and lifestyle improvement, atheromatous plaque may form again inside the stent, leading to restenosis. 4. After stent implantation, cardiac ultrasound, CT, magnetic resonance and other examinations can be performed, although it will cause some interference with CT and magnetic resonance imaging. 5. Stent implantation does not affect the normal activities and exercise, and will not fall off because of activities, the restriction of the intensity of activities is the recovery of the heart, not because of the implantation of the stent. If the stent implantation process is smooth, the impact on the body is minimal. Of course, stent implantation is also risky. During the process of stent implantation, there may be broken guide wires, stent dislodgment, hemangioma at the site of stent implantation, malignant arrhythmia, severe bradycardia, perforated and ruptured blood vessels, pericardial effusion, recurrent acute myocardial infarction, arterial entrapment, etc., or even death, but the chances of these cases are very small.