cardiac operation under direct vision

• 心脏直视手术

cardiac operation under direct vision的用法和样例：

例句

1. In cardiac operation,it is used for attracting the blood in left atrium through atrial septal or upper lung vein,inserting in left atrium.
   在心脏直视手术中，经房间隔或左上肺静脉，插入左房，吸引左房内的血液。