1, Indications A. Typical pulmonary stenosis with trans-pulmonary pressure difference ≥ 40 mmHg; B. For adolescent and adult patients with trans-pulmonary pressure ≥ 30 mmHg, combined with exertional dyspnea, angina pectoris, syncope and other symptoms. 2, relative indications A. severe pulmonary stenosis with right-to-left shunt at the atrial level; B. mild to moderate dysplastic pulmonary stenosis; C. infants and children with complex precordial disease with pulmonary stenosis, temporarily unable to perform radical surgery, the application of percutaneous balloon pulmonary valvuloplasty palliative treatment to relieve symptoms; D. some infants with severe tetralogy of Fallot with pulmonary stenosis, can try balloon valvuloplasty to E. Residual pressure step difference after pulmonary valve surgery; F. Pulmonary valve atresia with intact septum and normal or mildly dysplastic right ventricular development may be tried with radiofrequency perforation and then balloon dilation. 3, Contraindications A. Inferior pulmonary valve funnel stenosis; pulmonary valve stenosis with subvalvular stenosis or supravalvular stenosis B. Severe dysplastic pulmonary valve stenosis