The right ventricular cineangiogram was done before and immediately following dilation to measure the diameter of pulmonary valve annulus and observe the infundibular spazm.

• 术前、术后定期行经胸超声心动图检查，估测最大跨肺动脉瓣压力阶差，并观察肺动脉瓣形态及其反流情况。