CTICasesTricuspid Atresia with Coronary Sinusoids
Imaging findings
Cardiac CT of a 22-year-old shows absent tricuspid valve tissue, a hypoplastic right ventricle, a large ASD, a dilated right coronary artery, and tortuous sinusoids (fistulas) connecting the RCA to the high-pressure RV chamber.
Key takeaways
Tricuspid atresia/hypoplasia with an intact ventricular septum is associated with myocardial sinusoids. These represent persistent embryonic connections that decompress the high-pressure RV chamber into the coronary system.
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