A case of posteroseptal myocardial infarction in which rupture of the septum developed just beneath the "membranous septum" is reported. Electrocardiographic examination shortly before death ...

Membranous VSDs are the most common type and ... however extend into the muscular septum. Supracristal VSDs occur just beneath the aortic valve at the left ventricular outflow tract.

Tubular defects in the ventricular septum (arrow). Faint enhancement ... VSDs can be divided into membranous defects near the tricuspid and aortic valves, perimembranous defects, and muscular ...