Key result
Cardiac MRI in a patient with left bundle branch block revealed septal late gadolinium enhancement mimicking infarction, likely arising from altered ventricular hemodynamics rather than ischemia.
Case Report (n=1)
Left bundle branch block can cause late gadolinium enhancement on cardiac MRI mimicking myocardial infarction, which should be recognized to avoid unnecessary interventions.
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May prompt reevaluation of septal LGE etiology in bundle branch block; extends non-ischemic fibrosis characterization but remains hypothesis-generating.
Cardiac MRI serves as an indispensable tool for diagnosing and characterizing myocardial pathology. Late gadolinium enhancement (LGE) imaging enables assessing myocardial scar formation and regional fibrosis. Here, we present a case involving a young woman with congenital dilated cardiomyopathy, showcasing LGE along the interventricular septum. This LGE distribution likely arises from altered ventricular hemodynamics secondary to bundle branch block rather than ischemia. This insight has significant implications for guiding clinical management and avoiding unnecessary interventions.
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Flynn et al. (2025) conducted a case report in Congenital dilated cardiomyopathy with left bundle branch block (n=1). Cardiac MRI with late gadolinium enhancement (LGE) was evaluated on LGE distribution along the interventricular septum. Cardiac MRI in a patient with left bundle branch block revealed septal late gadolinium enhancement mimicking infarction, likely arising from altered ventricular hemodynamics rather than ischemia.
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