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Related Concept Videos

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Cyclic alternating pattern in obstructive sleep apnea: A preliminary study.

Valentina Gnoni1,2, Panagis Drakatos1,2,3, Sean Higgins1,2

  • 1Department of Neuroimaging, Sleep and Brain Plasticity Centre, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, UK.

Journal of Sleep Research
|May 3, 2021
PubMed
Summary
This summary is machine-generated.

Obstructive sleep apnea (OSA) severity influences arousal patterns. Milder OSA uses adaptive cyclic alternating pattern (CAP) A1, while severe OSA shows disrupted sleep circuitry with CAP A2/A3.

Keywords:
arousalscyclic alternating patternobstructive sleep apneasleep

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Cardiology

Background:

  • Obstructive sleep apnea (OSA) is associated with serious health issues like cardiovascular disease and dementia.
  • The exact link between OSA respiratory events, arousals, and their consequences is not fully understood.
  • Previous studies on OSA and cyclic alternating pattern (CAP) arousal patterns yielded inconsistent results, possibly due to comorbidities.

Purpose of the Study:

  • To clarify the relationship between OSA severity and CAP arousal patterns.
  • To investigate CAP subtypes in OSA patients without comorbidities.

Main Methods:

  • Analyzed whole-night electroencephalography and polysomnography in 18 adult males with OSA and no comorbidities.
  • Performed cyclic alternating pattern (CAP) analysis, verified by certified somnologists.
  • Used pairwise linear regression to correlate OSA severity (apnea-hypopnea index) with CAP subtypes.

Main Results:

  • Found an inverse relationship between OSA severity and CAP subtype A1 (more common in milder OSA).
  • Found a direct correlation between OSA severity and CAP subtype A3 (more common in moderate-to-severe OSA).
  • Milder OSA patients had better sleep efficiency and more deep sleep (N3), while severe OSA patients had more lighter sleep stages.

Conclusions:

  • Suggests a balance in CAP's adaptive and maladaptive arousal processes in OSA.
  • In milder OSA, CAP A1 may reinforce sleep continuity.
  • In severe OSA, sleep-stabilizing mechanisms may decompensate, leading to disruptive CAP fluctuations.