1.Arteriovenous catheter failure 1.Arteriovenous catheter failure with clinical symptoms, cardiac overload performance or continuous murmur, not combined with cardiac malformation requiring surgery, weighing not less than 8 kg. 2.Arteriovenous catheter failure with clinical symptoms, cardiac overload performance or continuous murmur, not combined with cardiac malformation requiring surgery, weighing 4-8 kg. 3.Arteriovenous catheter failure of not less than 14 mm. 4.Arteriovenous catheter failure 3 months after control of infective endocardial eye. 5, Combined mild to moderate mitral valve insufficiency, mild to moderate aortic valve stenosis and insufficiency of closure of the arteriovenous catheter. Second, the atrial septal defect 1, age: generally not less than 3 years old. 2, diameter not less than 5 mm, with increased right heart volume load, not greater than 36 mm secondary foramen ovale type left-to-right shunt atrial septal defect. 3.The distance from the edge of the defect to the coronary sinus, superior and inferior vena cava and pulmonary veins is not less than 5mm; the distance to the atrioventricular valve is not less than 7mm. 4.The diameter of the atrial septal defect is larger than the diameter of the left atrial lateral disc of the selected blocker. 5.No other cardiac malformation that must be combined with surgery. 6. Post-surgical residual shunt. C. Pulmonary stenosis 1. typical pulmonary stenosis, with normal cardiac output with a trans-pulmonary valve pressure difference of not less than 50 mm Hg by cardiac catheterization. optimal age 2-4 years, other age groups are possible. 2, Typical pulmonary valve stenosis, ECG suggests large right ventricle, right ventriculography suggests dilated pulmonary artery, jet sign exists, but the trans-pulmonary valve pressure difference is less than 50 mmHg and not less than 35 mmHg by cardiac catheterization. 3, Severe neonatal pulmonary valve stenosis. 4, Severe pulmonary valve stenosis with right-to-left shunt at atrial level. 5, Mild or moderate dysplasia or bivalve malformation of pulmonary valve stenosis, reduced shape treatment. 6, typical pulmonary valve stenosis combined with arteriovenous stenosis or atrial septal defect and other precordial diseases, which can be treated with simultaneous intervention. 7.Composite or complex malformation combined with pulmonary valve stenosis, reduced shape treatment. 4.Ventricular septal defect 1.perimembranous septal defect: age not less than 3 years old. Weight greater than 5 kg. simple ventricular septal defect with hemodynamic abnormalities, diameter 3-14 mm. the upper edge of the ventricular septal defect is not less than 2 mm from the right coronary valve of the aorta, no right coronary valve of the aorta off into the ventricular septal defect and aortic regurgitation. The ultrasound was in the position of 9-12 o’clock in the short-axis five-chamber heart section of the great vessels. 2, Myocardial ventricular septal defect of not less than 3 mm. 3, Residual shunt after surgical procedure. 4.Ventricular septal defect after myocardial infarction or trauma. 5.Small ventricular defect with a diameter of less than 3 mm and no obvious hemodynamic abnormalities. There are clinical cases of infective endocarditis complicated by the presence of small ventricular defects; therefore, the purpose of blocking treatment is to avoid or reduce patients’ complications of infective endocarditis due to small ventricular defects. In adult patients, the defect is often combined with aortic valve prolapse, and the size of the defect is mostly underestimated by ultrasound and left ventriculography. Although this type of ventricular defect is close to the aortic valve, according to the current experience of interventional treatment, if the defect is more than 2 mm away from the pulmonary valve and less than 5 mm in diameter, most patients can be successfully blocked, but the long-term outcome needs to be followed up. 7, 3 months after the cure of infective endocarditis, there is no redundancy in the heart cavity. 8.The upper edge of the ventricular defect is not more than 2mm from the right coronary valve of the aorta, without aortic right coronary sinus prolapse, without combined aortic regurgitation, or combined with mild aortic regurgitation. 9.Ventricular defect combined with atrioventricular afferent to block of degree I or type I atrioventricular afferent to block of degree II. 10.Ventricular defect combined with arteriovenous catheter failure, with indications for interventional treatment. 11, porous ventricular defect with bulging aneurysm, the upper edge of the defect is more than 2 mm from the aortic valve, the outlet is relatively concentrated, and the left ventricular surface of the blocker can completely cover the entire entrance.