us-abim MCQ (SBA): HFrEF (quadruple therapy)

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EasyCardiologyHFrEF (quadruple therapy)us-abimus-usmle-step-2

A 64-year-old with ischemic cardiomyopathy (EF 30%) on ACEi/β‑blocker only. According to HF guideline, which core drug class should be added to complete foundational quadruple therapy?

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us-abim MCQ: HFrEF (quadruple therapy) — Answer & Explanation | iatroX