CTICasesSupra-cristal VSD with right coronary sinus of Valsalva aneurysm
Imaging findings
CT scan shows aneurysmal dilatation, protrusion, and calcification of the right coronary sinus of Valsalva bulging into the right ventricular outflow tract (RVOT) below the pulmonic valve, associated with a subpulmonic ventricular septal defect (VSD).
Key takeaways
Supra-cristal (subpulmonic/conal) VSDs are located immediately beneath the semilunar valves. Venturi effects can lead to prolapse of the right coronary cusp and subsequent sinus of Valsalva aneurysm formation, which can bulge into or obstruct the RVOT.
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