CTICasesCor Triatriatum Sinister and Unroofed Coronary Sinus
Imaging findings
Contrast-enhanced chest CT shows a fibromuscular membrane dividing the left atrium into two chambers, characteristic of cor triatriatum sinister. Additionally, a persistent left-sided superior vena cava and an unroofed coronary sinus with direct drainage into the left atrium are noted.
Key takeaways
Cor triatriatum sinister is a rare congenital cardiac anomaly where a membrane divides the left atrium. It is frequently associated with other congenital cardiovascular anomalies, such as an unroofed coronary sinus or persistent left superior vena cava, which can cause varying degrees of left-to-right shunting.
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