A Randomized Controlled Trial:Treatments on Infundibular Ventricular Septal Defect

Inclusion Criteria: (1) patients with single IVSD indicated by TTE，without concomitant cardiac malformation, serious arrhythmia or other important non-cardiac diseases；(2) patients whose ventricular septal defects from aortic residual \< 3 mm, preoperative without aortic regurgitation or only mild reflux, defect size ≤10 mm; Exclusion Criteria: (1) defect size \> 10 mm in diameter; （2) Preoperative with above moderate aortic valve prolapse (or) closed incompletely; (3) Eisenmenger syndrome caused by pulmonary hypertension,(4)decide temporarily to change method before surgery;(5) not signed informed consent application