CTICasesInferior Sinus Venosus Atrial Septal Defect (ASD)
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Imaging findings
CT demonstrated an inferior sinus venosus type atrial septal defect, showing a direct connection between the right and left atria located inferiorly near the IVC. The right ventricle was significantly enlarged, and shunt vascularity was evident, consistent with a substantial left-to-right shunt. Post-surgical imaging confirmed repair with a pericardial patch.
Key takeaways
Inferior sinus venosus ASDs are congenital communications between the atria located inferiorly, typically associated with the IVC. Despite being asymptomatic, the patient had a large shunt causing right ventricular enlargement, emphasizing the importance of detection. Surgical repair involves patching the defect to prevent long-term complications.
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