Membranous septal aneurysm causing severe right ventricular outflow obstruction in an adult with trisomy 18

Cardiol Young. 2021 Sep;31(9):1498-1499. doi: 10.1017/S1047951121001931. Epub 2021 May 14.


Membranous ventricular septal aneurysm is a known entity but rarely causes severe right ventricular outflow obstruction. We report a 40-year-old female with trisomy 18 who developed severe right ventricular outflow obstruction caused by an enormous membranous septal aneurysm associated with unrepaired inlet ventricular septal defect with perimembranous extension.

Keywords: Membranous septal aneurysm; right ventricular outflow tract obstruction; ventricular septal defect.

Publication types

  • Case Reports

MeSH terms

  • Adult
  • Female
  • Heart Aneurysm* / diagnosis
  • Heart Aneurysm* / diagnostic imaging
  • Heart Septal Defects*
  • Heart Septal Defects, Ventricular* / diagnosis
  • Heart Septal Defects, Ventricular* / genetics
  • Humans
  • Trisomy 18 Syndrome
  • Ventricular Outflow Obstruction* / diagnosis
  • Ventricular Outflow Obstruction* / etiology