CTICasesPatent Ductus Arteriosus Communicating with the False Lumen in a Type B Aortic Dissection
Imaging findings
In a patient with an acute Type B aortic dissection, a small vessel is seen extending from the region of the aortic isthmus down toward the pulmonary artery, communicating with both the true and false lumen; multiplanar reformats confirm this represents a patent ductus arteriosus rather than a complication of the dissection itself. Following endovascular repair, the excluded false lumen continues to fill via this channel, presumably through retrograde flow from the pulmonary artery through an intercostal vessel.
Key takeaways
This is an unusual coexistence of a congenital patent ductus arteriosus with an acute Type B aortic dissection, and the persistent false lumen filling through the ductus after endovascular repair represents a potential source of endoleak or continued false lumen perfusion that would not otherwise be anticipated.
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