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Moderate"B"Heart Failure with Reduced Ejection Fraction (HFrEF)lbbb with qrs ≥150 ms

A 62-year-old with HFrEF (LVEF 25%) on ARNI, beta-blocker, MRA, and SGLT2i remains symptomatic (NYHA III). QRS 160 ms with LBBB. What device therapy is indicated?

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