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Obstructive Sleep Apnea in Cardiac Rehabilitation Patients.

David Hupin1,2, Vincent Pichot1,2, Mathieu Berger2

  • 1EA SNA EPIS 4607, Autonomic Nervous System, University of Lyon, University Jean Monnet, Saint-Etienne, France.

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Cardiac rehabilitation significantly improves severe obstructive sleep apnea (OSA) in post-myocardial infarction patients. Physical activity may enhance autonomic nervous system (ANS) function, offering a new therapy for OSA in coronary artery disease (CAD).

Keywords:
autonomic nervous systemcardiac rehabilitationcoronary artery diseaseobstructive sleep apneaphysical activity

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Area of Science:

  • Cardiology
  • Sleep Medicine
  • Rehabilitation Medicine

Background:

  • Obstructive sleep apnea (OSA) is common in patients with coronary artery disease (CAD).
  • Physical activity generally improves OSA, but its effect in post-myocardial infarction (MI) patients undergoing cardiac rehabilitation is unclear.
  • Autonomic nervous system (ANS) dysfunction is prevalent in these patients.

Purpose of the Study:

  • To assess the impact of cardiac rehabilitation on OSA severity in post-MI patients.
  • To evaluate changes in ANS activity in response to rehabilitation.
  • To determine if physical activity improvements correlate with OSA and ANS changes.

Main Methods:

  • 105 post-MI patients with OSA in a cardiac rehabilitation program were studied.
  • Apnea-hypopnea index (AHI) was derived from ECG-recorded respiration (AHIEDR).
  • Cardiopulmonary exercise testing (peak VO2) and ANS assessments (baroreflex sensitivity, heart rate variability) were performed.

Main Results:

  • 65% of patients with OSA lacked typical daytime symptoms.
  • Cardiac rehabilitation significantly reduced AHIEDR in severe OSA patients (-9.3 ± 9.5, P < .0001).
  • Greater AHIEDR reduction was observed with improved peak VO2 and baroreflex sensitivity (-11.6 ± 9.1, P < .001).

Conclusions:

  • Two months of cardiopulmonary rehabilitation significantly improves severe OSA in CAD patients.
  • Enhancing ANS activity via physical activity presents a potential complementary therapy for OSA in this population.
  • Cardiac rehabilitation offers benefits beyond cardiovascular improvements for post-MI patients with OSA.