CTICasesDouble Outlet Right Ventricle with Levoatriocardinal Vein
Imaging findings
Cardiac MR and MR angiogram show both the aorta and pulmonary artery arising from the right ventricle, diagnostic of a double outlet right ventricle. Additionally, a large anomalous vertical vein (levoatriocardinal vein) on the left side is shown communicating between the left atrium and the left brachiocephalic vein, with 4D flow imaging demonstrating bidirectional, to-and-fro flow through this vessel.
Key takeaways
A levoatriocardinal vein is a rare congenital vascular anomaly that can serve as a decompression pathway for the left atrium, occasionally demonstrating bidirectional flow on 4D flow MRI. Its presence may be associated with other congenital heart defects, such as a double outlet right ventricle, and it can pose a risk for paradoxical systemic embolization.
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