ArticleJournal of the American Heart Association2025
Incremental Prognostic Value of Hippocampal Metabolic Activity for Sudden Cardiac Death in Patients With Heart Failure With Reduced Ejection Fraction.
Article in Journal of the American Heart Association, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundHippocampal injury is linked to cognitive impairment and cardiac events in patients with heart failure with reduced ejection fraction. However, the predictive value of hippocampal metabolic activity (HMA) for sudden cardiac death (SCD) and the underlying mechanisms remain unclear. This study aimed to evaluate the independent and incremental predictive value of HMA over myocardial scar for SCD-related events in patients with heart failure with reduced ejection fraction and to explore the potential mechanism.
methodsThis prospective study included 270 patients with heart failure with reduced ejection fraction undergoing gated single-photon emission computed tomography and brain/cardiac
resultsOverall, 34 (12.6%; median follow-up, 4.3 years) patients experienced SCD-related events. Functional myocardial scarring and HMA were strongly associated with SCD-related events (all
conclusionsFunctional myocardial scarring and HMA had strong independent prognostic value in the risk stratification of SCD-related events in patients with heart failure with reduced ejection fraction. Additionally, HMA had incremental prognostic value based on myocardial scarring. HMA impairment may induce SCD-related events, partly mediated by corrected QT interval.
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