CTICasesLeft Ventricular Pseudoaneurysm
Imaging findings
Cardiac CT three weeks after a myocardial infarction (100% occlusion of the first diagonal branch) demonstrates a focal defect in the anterolateral wall of the left ventricle, with contrast extravasation into a small, pouch-like pseudoaneurysm sac. No hemopericardium is present on the soft-tissue windows.
Key takeaways
Left ventricular pseudoaneurysm is a rare, life-threatening complication of myocardial infarction resulting from free wall rupture that is contained by adherent pericardium or scar tissue. Unlike true aneurysms (which consist of thinned myocardium and have a wide neck), pseudoaneurysms have a narrow neck and carry a high risk of spontaneous rupture, requiring urgent surgical repair once diagnosed.
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