ICU · Cardiovascular
Heart failure guideline-directed medical therapy update: SGLT2, ARNI, and the four pillars
Also known as Heart failure GDMT · Guideline-directed medical therapy · SGLT2 inhibitors · ARNI · Four pillars of heart failure · Dapagliflozin · Empagliflozin
Heart failure with reduced EF (HFrEF): FOUR PILLARS of guideline-directed medical therapy (GDMT). (1) ARNI (sacubitril/valsartan) or ACEi/ARB. (2) Beta-blocker (bisoprolol, carvedilol, metoprolol succinate). (3) Mineralocorticoid receptor antagonist (MRA — spironolactone, eplerenone). (4) SGLT2 inhibitor (dapagliflozin, empagliflozin) — NEWEST, benefits HF regardless of diabetes. Each reduces mortality ~15-20%. Target: all four (if tolerated). New paradigm: start EARLY, all FOUR, then uptitrate. SGLT2 inhibitors are REVOLUTIONARY — first drug class to benefit HFrEF AND HFpEF. In ICU: don't start new GDMT during acute decompensation — stabilise first, start after recovery.
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- SGLT2 inhibitors (dapagliflozin, empagliflozin) benefit BOTH HFrEF AND HFpEF — first drug class to do so
- Four pillars — start all early (within days-weeks), not sequentially over months
- Don't start new GDMT during acute decompensation in ICU — stabilise first
- SGLT2 inhibitors: risk of euglycaemic DKA, volume depletion, genital infections
Meet the patient
A 64-year-old man is reviewed in ICU two days after an anterior STEMI, now euvolaemic on IV furosemide. The echo shows an ejection fraction of 25 per cent with apical akinesis. He is in sinus rhythm at 76, BP 112/68, eGFR 65, potassium 4.2, and he is taking aspirin, ticagrelor, atorvastatin and ramipril 2.5 mg. The question the round turns on is not whether to treat him — it is how fast the four foundational therapies go in: four evidence-based drug classes carry clinical benefit within 30 days of initiation, and hospitalisation is a key point to start them.[28]
The single idea that organises everything: HFrEF is a neurohormonal disease, and each pillar blocks one limb of the maladaptive remodelling loop. Start them together because the benefits are additive — patients die while you wait to add the next drug.[7]
References33ShowHide
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