排除标准 Exclusion Criteria

• 超声多普勒测定最高瞬时压力差大于40mmHg （The residual Doppler peak instantanteous gradient is >= 40mmHg）
• 患者术前危重肺动脉狭窄（右室压力高于系统）(The patient has preoperative critical pulmonary valve stenosis(suprasystemic right ventricular pressure))
• 患者球囊瓣膜成形术或瓣膜切开术时小于1岁

临床协议说明

For this algorithm, "Time 0" is the first postoperative, outpatient visit subsequent to resolution of all perioperative problems such as pleural effusions, pericardial effusions, postoperative fevers, or wound infections. Entry of a patient at Time 0 assumes that a postoperative echocardiogram has been performed and that the transpulmonary valve gradient is <40 mm Hg. It also assumes that residual subvalvar pulmonary stenosis has resolved at the time of the initial postoperative, out-of-hospital visit.