An endocoronary stent is a support tube of porous stainless steel (or other metals such as cobalt alloy) that can be opened by balloon expansion, which is attached to the surface of the balloon and delivered by the delivery system to the vascular lesion for release. It completely solves the restenosis caused by elastic retraction and negative remodeling of the vessel after PTCA, resulting in a significant reduction in the postoperative restenosis rate of about 20% to 30%. Indications for intracoronary stenting Patients with all types of coronary artery disease, such as stable angina, unstable angina, myocardial infarction, etc., who have one or several lesions with a luminal stenosis of 50-70% or more and a length of 15 mm or less, as confirmed by blood coronary angiography. Patients should take oral antiplatelet medication for 3 days before surgery and for 9 months after surgery to effectively control blood pressure and blood lipids and prevent restenosis or thrombotic obstruction in the stent to ensure the treatment effect. Preoperative preparation for intracoronary stent implantation Preoperative examination: Preoperative examinations such as cardiac duplex film, electrocardiogram and cardiac ultrasound are usually done, and blood tests for routine blood, coagulation, liver and kidney function electrolytes, lipids, blood glucose and blood type, as well as screening for infectious diseases are also required. Preoperative preparation: Penicillin skin test, iodine allergy test, bilateral inguinal skin preparation (after skin preparation, please take a bath and change clean clothes), and training to defecate in bed (to prevent difficulty in defecation after surgery, because it is necessary to lie down for 24 hours after surgery and cannot get out of bed) should be performed before surgery. You should fast for 6 hours and fast from water for 2 hours before surgery, but take your daily oral medication as usual except stop taking hypoglycemic drugs and portable blockers on the day of surgery (please take Bamil with warm boiled water). Empty your bowels and remove all body ornaments half an hour before the operation. How to perform intracoronary stenting Intracoronary stenting is to attach a lattice-like alloy stent to the original balloon. After the balloon has propped up the narrowed blood vessel, the metal stent is then expanded and released so that it is attached to the wall of the blood vessel, and the stent acts as a support for the blood vessel to ensure unobstructed blood flow and can completely cure coronary heart disease. Advantages of intracoronary stenting Intracoronary stenting is one of the most effective treatments for coronary artery disease. No incision is required and its relief of symptoms is rapid and reliable. For patients with poor results of drug therapy and limited or staged stenosis of coronary arteries clearly identified by selective coronary angiography, a balloon or a balloon with stent is delivered through a cardiac catheter and a balloon is dilated or a stent with vascular support is placed at the narrowed coronary lesion to restore normal blood flow to the stenosis, effectively ensuring blood supply to the heart muscle, relieving the patient’s clinical symptoms, and improving The patient’s quality of life will be improved.