At present, congenital heart disease (CHD) remains the most common birth defect in humans, affecting nearly 1% of all newborns. In recent years, there has been great progress in the treatment of congenital heart disease, especially with the development of interventional techniques and devices and the accumulation of experience, interventional treatment of congenital heart disease has made great progress, and the treatment of congenital heart disease without surgery has become the first option considered by many parents of children. The so-called cardiac interventional therapy is a method of treating heart disease by entering the human heart and large blood vessels through special devices such as catheters under the guidance of X-ray fluoroscopy or other imaging methods. Because it requires only local anesthesia, is easy to operate, does not require open-heart surgery, is less painful for the patient, less risky, and has a quick recovery, its application is becoming more and more widespread, and its scope is gradually expanding to various fields of cardiology, and common heart diseases such as coronary heart disease and congenital heart disease can be cured by interventional treatment. The congenital heart diseases that can be treated with interventional therapy include arteriovenous ductus arteriosus, atrial septal defect, ventricular septal defect, pulmonary stenosis, aortic stenosis, aortic constriction, coronary artery fistula, pulmonary artery branch stenosis, blockage of collateral vessels and anomalous channels, etc. At present, with the decrease in the price of blocking devices, the cost of interventional treatment for precordial disease has dropped greatly, even lower than that of open-heart surgery. The hospitalization time for interventional treatment of precardiac disease is short, such as arteriovenous catheterization, atrial septal defect, pulmonary stenosis, etc. Generally, the hospitalization is about 5 days, and ventricular septal defect takes about a week; you can get out of bed on the second day after surgery. With the maturity of the interventional technology and the accumulation of experience, most of the interventional treatments for precordial diseases can be carried out smoothly with few complications. Our department has been carrying out interventional treatment of precardiac disease since 2000, and has successfully completed more than 2000 cases. With the popularization of medical knowledge and the Internet, more and more parents of children first consult whether interventional treatment is possible, and if interventional treatment cannot be accepted after evaluation, they can only undergo surgical open-heart surgery. Traditional surgery requires median or lateral chest opening, ventilator insertion during surgery, general anesthesia, sometimes extracorporeal circulation (stopping the heart and using an extracorporeal circulation machine to temporarily replace the heart function), long incision (15-20cm), trauma, long operation time, at the earliest it takes 2-3 hours, more severe postoperative pain, slow recovery, long hospital stay, obvious skin scars, affecting Aesthetics. In contrast, interventional treatment of unclosed arterial ducts requires only local anesthesia in older children or adults. In children who are too young to cooperate, intravenous induction of anesthesia is used, and the child does not need to be on a ventilator; only the child needs to remain asleep. No skin incision is required, only two small holes for injections at the base of the thigh. A catheter is inserted from the femoral vein at the root of the thigh to the heart, through the right ventricle, the pulmonary artery to the arterial catheter, and then a flexible, front-end elbow guiding wire is introduced into the descending aorta, which is the main guiding support during the operation. Then, following the wire, an outer sheath is introduced up to the descending aorta, which serves as the delivery channel for the blocking device. The blocking device is fixed to the delivery rail, and after delivery to the descending aorta, the blocking device is released sequentially along the descending aorta – arterial duct – pulmonary artery to block the arterial duct, thus blocking the abnormal blood flow through the area and providing a complete cure. After confirming complete blockage, the blocker is released and the procedure is successful.