Ventricular septal defect (VSD)

on 2.9.08 with 0 comments

  • by far and away, the most common congenital heart defect

  • types

    • membranous septum defect 90%

    • remainder: muscular septum or subvalvular

  • clinical significance is a function of the size and severity of pulmonary stenosis; small VSDs may close spontaneously

VSD diagram

  • muscular septum type VSD: LV pumps blood into RV. this must be treated if the defect is big enough

gross specimen: membranous VSD

  • defect is right below the aortic valve and just above the muscular septum

  • this defect is enormous—they are considered large if they are equal to the size of the aortic valve or bigger

  • there are also often effectively treated with devices implanted via catheterization

gross specimen: muscular VSD

  • there is a small defect and a large defect in the septum

  • not uncommonly, there are multiple defects in muscular type VSDs. in membranous VSDs, however, the defects are usually solitary

Category: Pathology Notes



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