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[Associated factors for sleep apnea in heart failure]

G Tsémo Watchueng1, C Mouly-Bertin, C Depagne

  • 1Service de pneumologie, hôpital de la Croix-Rousse, Lyon, France. ghistw@yahoo.fr

Annales De Cardiologie Et D'Angeiologie
|June 14, 2011
PubMed

Insights

Sleep apnoea syndrome (SAS) in chronic heart failure (CHF) is linked to higher left ventricular pressures. Central sleep apnoea (CSA) patients show a worse functional state than obstructive sleep apnoea (OSA) patients.

Area of Science:

  • Cardiology
  • Sleep Medicine
  • Pulmonology

Background:

  • Sleep apnoea syndrome (SAS) is common in chronic heart failure (CHF), but its origins are not fully understood.
  • Understanding associated factors and differentiating between central sleep apnoea (CSA) and obstructive sleep apnoea (OSA) in CHF patients is crucial for management.

Purpose of the Study:

  • To identify factors associated with SAS in patients with heart failure (HF).
  • To compare the characteristics of central sleep apnoea (CSA) and obstructive sleep apnoea (OSA) within the heart failure population.

Main Methods:

  • A cross-sectional, retrospective study involving 30 patients with stable heart failure on optimal medical therapy.
  • Data collection included polygraphy, echocardiography, and cardiopulmonary exercise testing.

Main Results:

  • SAS was present in 60% of patients (33.3% CSA, 26.7% OSA).
  • Higher body mass index, blood pressure, and left ventricular pressures (E/Ea ratio) were associated with SAS.
  • CSA patients exhibited higher New York Heart Association class and lower peak VO2 compared to OSA patients.

Conclusions:

  • Elevated left ventricular pressures, indicated by the E/Ea ratio, are significantly associated with SAS in heart failure patients.
  • Central sleep apnoea (CSA) appears to be linked to a poorer functional status in heart failure compared to obstructive sleep apnoea (OSA).
Abstract

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