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Area of Science:

  • Cardiology
  • Pulmonology
  • Sleep Medicine

Background:

  • Central sleep apnea (CSA) is linked to higher mortality in heart failure (HF) patients.
  • Positive airway pressure, particularly auto-servoventilation (ASV), has been investigated for treating CSA and improving cardiac function in HF.
  • Previous studies suggested ASV efficacy in HF patients with CSA, showing positive surrogate outcomes.

Purpose of the Study:

  • To review the appropriate use of ASV for sleep-disordered breathing, including Cheyne-Stokes respiration, treatment-emergent central apnea, and opioid-induced periodic breathing.
  • To emphasize proper patient and therapy selection for ASV, particularly in heart failure patients.
  • To address the urgent educational need following conflicting results from the SERVE-HF trial.

Main Methods:

  • Review of existing literature and clinical guidelines on ASV use.
  • Analysis of findings from the SERVE-HF trial and comparison with earlier studies.
  • Focus on patient selection criteria and validated clinical applications of ASV.

Main Results:

  • The SERVE-HF trial indicated no significant effect of ASV on the primary endpoint in stable HF patients with reduced ejection fraction and predominantly CSA.
  • The SERVE-HF trial reported an increase in all-cause and cardiovascular mortality in the ASV arm.
  • These findings contrast with earlier smaller studies that reported positive surrogate outcomes for ASV in HF patients with CSA.

Conclusions:

  • The SERVE-HF trial results necessitate further investigation and resolution regarding ASV's role in heart failure patients with central sleep apnea.
  • There is an urgent need for updated education on the approved labeling and validated clinical use of ASV.
  • Careful patient selection, especially in heart failure populations, is crucial for the safe and effective application of ASV.