Ventricular septal defect Ventricular septal defect anatomy

and Leida Perez, M.D.

Associate Editor-In-Chief: Keri Shafer, M.D. [mailto:kshafer@bidmc.harvard.edu], Priyamvada Singh, MBBS

Ventricular septum anatomy

The ventricular septum can be divided into four components-


 * Membranous
 * Inlet septum
 * Trabecular septum
 * Outlet or Infundibular septum

The disease occurs either due to defective growth or failure to alignment of one of these components. Types of defects seen are-


 * Membranous septum (Perimembranous, paramembranous)are most commonly seen.


 * Muscular septum defect


 * Outlet septum defect(supracristal/subpulmonary/outlet)


 * Malalignment of one of these septums.

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