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ModerateCardiologyHFrEF Optimizationus-abimus-usmle-step-2

A 73-year-old with HFrEF (LVEF 32%) on ARNI, beta-blocker, MRA, and SGLT2i has resting HR 78 in sinus rhythm. QRS 100 ms. NYHA II. Next disease-modifying step?

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