英语语法分析

Objectives To evaluate the effect of valvuloplasty on rheumatic mitral valve lesion.

目的评估二尖瓣成形术治疗风湿性二尖瓣膜病变的疗效。

Conclusion The valvuloplasty operations are firstly elected in cardiac valve operations of children.

结论儿童心瓣膜手术时，首先选择瓣膜成形术。

Objective: To discuss the effect of percutaneous balloon mitral valvuloplasty (PBMV) on non-simple mitral stenosis (MS).

目的：探讨经皮二尖瓣球囊扩张术(PBMV)治疗非单纯性二尖瓣狭窄(MS)的效果。