left atrium

基本解释

A P.F.O. is a tunnel that connects the upper chambers of the heart — the right atrium and the left atrium.
卵圆孔未闭会导致心脏上部腔体，即左心房和右心房之间存在一条通道连接。
The opening allows blood that has given up nutrients and oxygen after traveling through the rest of the body to shunt into the left atrium, instead of going into the lungs to pick up more oxygen.
这个连接可能导致输送养分和氧气的血液，在流经全身其他部位以后，本应进入肺部获取更多氧气时，突然转向进入左心房。
This may be due to significant inflammation due to extensive lesion sets in the left atrium.
导致这样的结果可能是由于炎症，大面积损伤嵌入到了左心房。