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ICU TopicsCardiovascular

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.

high33 referencesUpdated 19 Aug 202623 min readVerification in progress

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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
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Practise this topic8 MCQs with explanations

Target exams

CICMFFICMEDIC

Red flags

  • 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
In one line

Heart failure with reduced ejection fraction is now a manageable chronic disease built on four pillars: a beta-blocker, an ARNI (or ACE-inhibitor), a mineralocorticoid receptor antagonist, and an SGLT2 inhibitor. Each lowers mortality on its own; together they cut it by an estimated 70 to 80 per cent. The new paradigm is start all four early at low dose, then uptitrate — and in the ICU, stabilise first, never initiate a new beta-blocker in acute decompensation.[6][7]

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]

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References33ShowHide
  1. [1]McMurray JJV, Solomon SD, Inzucchi SE, et al. Dapagliflozin in Patients with Heart Failure and Reduced Ejection Fraction N Engl J Med, 2019.PMID 31535829
  2. [2]Packer M, Anker SD, Butler J, et al. Cardiovascular and Renal Outcomes with Empagliflozin in Heart Failure N Engl J Med, 2020.PMID 32865377
  3. [3]Anker SD, Butler J, Filippatos G, et al. Empagliflozin in Heart Failure with a Preserved Ejection Fraction N Engl J Med, 2021.PMID 34449189
  4. [4]McMurray JJV, Packer M, Desai AS, et al. Angiotensin-neprilysin inhibition versus enalapril in heart failure N Engl J Med, 2014.PMID 25176015
  5. [5]Pitt B, Zannad F, Remme WJ, et al. The effect of spironolactone on morbidity and mortality in patients with severe heart failure. Randomized Aldactone Evaluation Study Investigators N Engl J Med, 1999.PMID 10471456
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  7. [7]McDonagh TA, Metra M, Adamo M, et al. 2021 ESC Guidelines for the diagnosis and treatment of acute and chronic heart failure Eur Heart J, 2021.PMID 34447992
  8. [8]MERIT-HF Study Group. Effect of metoprolol CR/XL in chronic heart failure: Metoprolol CR/XL Randomised Intervention Trial in Congestive Heart Failure (MERIT-HF) Lancet, 1999.PMID 10376614
  9. [9]CIBIS-II Investigators. The Cardiac Insufficiency Bisoprolol Study II (CIBIS-II): a randomised trial Lancet, 1999.PMID 10023943
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  16. [16]Velazquez EJ, Morrow DA, DeVore AD, et al. Angiotensin-Neprilysin Inhibition in Acute Decompensated Heart Failure N Engl J Med, 2019.PMID 30415601
  17. [17]Wachter R, Senni M, Belohlavek J, et al. Initiation of sacubitril/valsartan in haemodynamically stabilised heart failure patients in hospital or early after discharge: primary results of the randomised TRANSITION study Eur J Heart Fail, 2019.PMID 31134724
  18. [18]Bardy GH, Lee KL, Mark DB, et al. Amiodarone or an implantable cardioverter-defibrillator for congestive heart failure N Engl J Med, 2005.PMID 15659722
  19. [19]Moss AJ, Zareba W, Hall WJ, et al. Prophylactic implantation of a defibrillator in patients with myocardial infarction and reduced ejection fraction N Engl J Med, 2002.PMID 11907286
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  22. [22]Granger CB, McMurray JJV, Yusuf S, et al. Effects of candesartan in patients with chronic heart failure and reduced left-ventricular systolic function intolerant to angiotensin-converting-enzyme inhibitors: the CHARM-Alternative trial Lancet, 2003.PMID 13678870
  23. [23]Solomon SD, McMurray JJV, Anand IS, et al. Angiotensin-Neprilysin Inhibition in Heart Failure with Preserved Ejection Fraction N Engl J Med, 2019.PMID 31475794
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  25. [25]Solomon SD, McMurray JJV, Claggett B, et al. Dapagliflozin in Heart Failure with Mildly Reduced or Preserved Ejection Fraction N Engl J Med, 2022.PMID 36027570
  26. [26]Chilbert MR, Rogers KC, Ciriello DN, et al. Inpatient Initiation of Sacubitril/Valsartan Ann Pharmacother, 2021.PMID 32741197
  27. [27]Mebazaa A, Davison B, Chioncel O, et al. Safety, tolerability and efficacy of up-titration of guideline-directed medical therapies for acute heart failure (STRONG-HF): a multinational, open-label, randomised, trial Lancet, 2022.PMID 36356631
  28. [28]Dixit NM, Shah S, Ziaeian B Optimizing Guideline-directed Medical Therapies for Heart Failure with Reduced Ejection Fraction During Hospitalization US Cardiol, 2021.PMID 39720493
  29. [29]Long B, Lentz S, Koyfman A Euglycemic diabetic ketoacidosis: Etiologies, evaluation, and management Am J Emerg Med, 2021.PMID 33626481
  30. [30]Peters AL, Buschur EO, Buse JB, et al. Euglycemic Diabetic Ketoacidosis: A Potential Complication of Treatment With Sodium-Glucose Cotransporter 2 Inhibition Diabetes Care, 2015.PMID 26078479
  31. [31]Anker SD, Comin Colet J, Filippatos G, et al. Ferric carboxymaltose in patients with heart failure and iron deficiency N Engl J Med, 2009.PMID 19920054
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