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EasyCardiologyHeart Failure (HFrEF)us-abimus-usmle-step-2us-usmle-step-3

A 61-year-old with HFrEF (EF 28%) on GDMT has resting HR 84/min and BP 104/66. He remains NYHA II. Labs show K⁺ 4.8 mEq/L and Cr 1.3 mg/dL. Which agent is contraindicated or not recommended?

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