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MediumCardiologyHeart Failure-GDMT Optimizationus-abimus-usmle-step-2us-usmle-step-3

A 60‑year‑old with HFrEF (EF 30%) on β‑blocker and SGLT2 inhibitor remains symptomatic. BP 118/70. Creatinine 1.0 mg/dL, K⁺ 4.6. Which addition offers mortality benefit?

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