CTICasesLeft Ventricular Pseudoaneurysm Following Septicemia
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Imaging findings
Cardiac MRI and chest CT demonstrate a large, non-physiologic outpouching projecting inferior and lateral to the left atrium, which communicates with the left ventricle at the level of the basal inferior wall just below the mitral annulus, showing a flow jet on cine sequences.
Key takeaways
Left ventricular pseudoaneurysms (false aneurysms) are contained myocardial ruptures bounded only by the pericardium or scar tissue, commonly occurring after myocardial infarction, cardiac surgery, or endocarditis/sepsis. A history of bacteremia (e.g., MRSA) can lead to a myocardial abscess or infectious destruction near the mitral annulus, predisposing to pseudoaneurysm formation that carries a high risk of rupture and typically requires surgical intervention.
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