A ventricular septal defect (VSD) is a defect in the ventricular septum, the wall dividing the left and right ventricles of the heart. The extent of the opening may vary from pin size to complete absence of the ventricular septum, creating one common ventricle.
Perimembranous VSD’s are located in the membranous septum, a relatively small portion of the septum located near the heart valves.
Muscular VSD’s are located in hte muscular portion of the ventricular septum. Many of these muscular VSD’s close spontaneously and do not require surgery.
The model depicts both a muscular and a perimembranous VSD.
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"Leiden-Delft-Groningen - 3D model Ventricular Septal Defect - numbered English labels" by Anna Sieben, UMCG, Monique R.M. Jongbloed, LUMC, Ludo de Goeje et al, license: CC BY-NC-SA
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