Objective To summarize the experience of the valve replacement for the senile degenerative heartvalvediseases.
目的探索总结老年性退行性主动脉瓣替换术的经验。
2
Objective To determine the surgical point and technique of artificial mechanical valve replacement in children with heartvalvediseases.
目的：探讨儿童心脏瓣膜病的人工机械瓣膜置换手术要点及方法。
3
Background: the incidence of heartvalvediseases is very high, valve replacement is an effective way for the treatment of heartvalvediseases internationally.