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

A 64-year-old with HFrEF (LVEF 30%) NYHA II is on lisinopril and metoprolol succinate. K+ 4.5 mEq/L, eGFR 60. Which addition most appropriately completes foundational therapy?

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