MME and heart failure: Background: Current guidelines emphasize the importance of initiating or optimizing the four pillars of heart failure with reduced ejection fraction (HFrEF) therapy—beta-blockers (BB), mineralocorticoid receptor antagonists (MRA), angiotensin receptor–neprilysin inhibitors (ARNI), and sodium–glucose cotransporter-2 inhibitors (SGLT2i)—during hospitalization for acute decompensation.