Their ages ranged from I month to 15 years (mean 8.3 years).Unicuspid aortic valve was present in three of them and bicuspid in the other one.

• 我们由1993年8月至1999年8月间在4句患孩，年龄由1个月至15岁（平均8.；3岁）施行主动脉瓣膜成形术。