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

A 62-year-old with HFrEF (LVEF 30%) on maximally tolerated ARNI, beta-blocker, and MRA remains NYHA II. He has no diabetes and eGFR 60. Which addition provides Class I mortality/morbidity benefit?

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