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ModerateCardiologyHFrEF Guideline-Directed Therapyus-abfmus-abimus-usmle-step-2us-usmle-step-3

A 66-year-old with HFrEF (EF 30%) is on sacubitril/valsartan, metoprolol succinate, and spironolactone. He remains symptomatic (NYHA II). What additional foundational therapy improves morbidity and mortality?

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