This episode reviews how device-based strategies can complement disease-modifying medical therapy in HF with preserved (HFpEF) and mildly reduced ejection fraction (HFmrEF). The discussion emphasizes a practical framework: confirm the HF syndrome and phenotype, identify structural or hemodynamic targets, and then consider appropriate device pathways (monitoring, valves, rhythm/conduction, and emerging structural approaches). Listeners will leave with a "when to refer" framework and implementation pearls for real-world practice.