Case report: Large left ventricular aneurysm with contained rupture and haemopericardium

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Background: Recent advancements in cardiology have significantly decreased the incidence of post-myocardial infarction mechanical complications. When these sequelae occur, they can have high morbidity and mortality and may require aggressive intervention. Case summary: We describe a case of contained rupture of a large left ventricular aneurysm (LVA) presenting with syncope in a 60-year-old male with late presentation myocardial infarction (MI) 6 weeks prior on home triple antithrombotic therapy (TAT). Urgent pericardiocentesis along with imaging techniques including ultrasound, computed tomography angiography (CTA), and cardiac magnetic resonance imaging (MRI) were used for initial diagnosis. Definitive treatment was achieved with excision and repair of the LVA with return to prior functional status 1 month after intervention. Discussion: Highlights of this report emphasize the importance of differential diagnosis consideration of LVA with contained rupture in patient populations with prior late presentation MI and TAT. High clinical suspicion and thorough diagnostic workup with appropriate imaging are important to guide appropriate treatment interventions.