英语语法分析

The posterior-septal pathways which can be successfully ablated in the coronary vein have certain characteristics in surface electrocardigram.

在冠状静脉内消融成功的后间隔旁道具有一些特定的体表心电图特征。

Atrial septal defect was diagnosed by transthoracic echocardiography thereafter.

经心脏超音波诊断出有心房中膈缺损。

Objective To explore the US diagnostic value of fetal heart ventricular septal defect.

目的：探讨超声对胎儿室间隔缺损诊断的应用价值。