A ventricular septal defect is when this lower wall—the ventricular septum— has a gap in it after development.
室间隔缺损就是位于心脏下方的室间隔,在发育之后存在一个缺口。
英语百科
Interventricular septum
(重定向自Ventricular septum)
The interventricular septum(IVS), (or ventricular septum, or during development septum inferius), is the stout wall separating the lower chambers (the ventricles) of the heart from one another.
The ventricular septum is directed obliquely backward to the right, and curved with the convexity toward the right ventricle; its margins correspond with the anterior and posterior longitudinal sulci.