perforation of cardiac valve

例句：

1. 1.The surgeon performed a perforation of the heart valve during the operation.
   外科医生在手术中进行了心脏瓣膜的穿孔。
2. 2.The hole in the wall was caused by a perforation of the plaster.
   墙上的洞是由石膏的穿孔造成的。
3. 3.The animal was found with a perforation in its throat.
   这只动物被发现喉咙里有穿孔。