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EasyCardiologyHeart Failure with Reduced EFus-abimus-abfmus-usmle-step-2us-usmle-step-3

A 64-year-old with HFrEF (EF 30%) on ACE inhibitor and beta-blocker remains symptomatic (NYHA II). Which addition has Class I mortality benefit across EF categories in HFrEF?

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