Ventricular septal defect Ventricular septal defect anatomy

Ventricular septal defect Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]and Leida Perez, M.D.

Associate Editor-In-Chief: Keri Shafer, M.D. [2], 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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