CTICasesLeft Ventricular Pseudoaneurysm from Venting Cannula Site
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Imaging findings
A follow-up study after descending aortic replacement showed a large pseudoaneurysm in the left ventricle, with a displaced felt reinforcement along its cephalad margin. Subsequent follow-up studies showed the pseudoaneurysm initially enlarging, but then spontaneously thrombosing and decreasing in size over a year, without any surgical intervention.
Key takeaways
This apical pseudoaneurysm was a complication from left ventricular venting, a procedure where a surgeon places a vent or bypass cannula in the left ventricle during surgery (e.g., to put the patient on bypass or de-air the ventricle). Despite concerns about rupture, this lesion spontaneously thrombosed and decreased in size.
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