Heart Failure — Reduced EF

Cardiology

Clinical HF syndrome with LVEF ≤40%.

Causes

  • Ischaemic heart disease
  • HTN
  • Dilated CMO
  • Valvular disease
  • Toxin (alcohol, chemo)
  • Peripartum, tachy-CMO

Clinical features

  • Dyspnoea, orthopnoea, PND, fatigue, oedema

Investigations

  • BNP/NT-proBNP
  • ECG, echo (EF, wall motion)
  • Cardiac MRI if aetiology unclear
  • Coronary angiography

Management

  • Four pillars: ARNI (or ACEi/ARB) + β-blocker + MRA + SGLT2i (dapagliflozin/empagliflozin)
  • Loop diuretic for congestion
  • Ivabradine if HR ≥75 on max β-blocker
  • Hydralazine + isosorbide dinitrate if intolerant to ARNI (esp black patients)

Drug therapy

  • ARNI: sacubitril/valsartan 24/26–97/103 mg BD
  • Bisoprolol/carvedilol/metoprolol XL up-titrated
  • Spironolactone/eplerenone 12.5–50 mg OD

Complications

  • Arrhythmia (SCD)
  • HF hospitalisations
  • Cardiorenal syndrome

Prevention

  • Cardiac rehab
  • Vaccination (flu, pneumococcal)
  • Salt/fluid restriction

Follow-up

  • Uptitrate in 2-week intervals
  • 6-week review post-discharge

Clinical pearls

  • Start all four pillars early even at low doses
  • Advanced HF referral if refractory (transplant, LVAD)

References

  • ESC 2021 HF + 2023 focused update
  • AHA/ACC 2022 HF

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