心脏瓣膜用牛心包替换术

cardiac valve replacement with bovine pericardium

心脏瓣膜用牛脑膜替换术

cardiac valve replacement with bovine meninges

连合连合两部分例如眼睑、嘴唇或心脏瓣膜联合或形成连接的点或面

The point or surface where two parts, such as the eyelids, lips, or cardiac valves, join or form a connection.

心脏的瓣膜使血液只能朝一个方向流动。

The valves of the heart allow the blood to pass in one direction only.