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Intermittent hypoxia and vascular function: implications for obstructive sleep apnoea.

Glen E Foster1, Marc J Poulin, Patrick J Hanly

  • 1Department of Medicine, Faculty of Medicine, University of Calgary, Health Sciences Center, Room 1421, 3330 Hospital Drive NW, Calgary, Alberta, Canada.

Experimental Physiology
|November 25, 2006
PubMed
Summary
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Obstructive sleep apnoea (OSA) is linked to cardiovascular issues like hypertension and stroke. Intermittent hypoxia in OSA may cause oxidative stress and inflammation, contributing to vascular disease.

Area of Science:

  • Cardiovascular science
  • Sleep medicine
  • Vascular biology

Background:

  • Obstructive sleep apnoea (OSA) is associated with increased risk of hypertension, stroke, and myocardial infarction.
  • Intermittent hypoxia is the primary proposed mechanism linking OSA to cardiovascular and cerebrovascular diseases.

Purpose of the Study:

  • To review the association between OSA and vascular disease.
  • To describe the underlying mechanisms of vascular damage in OSA.
  • To compare findings from OSA patients with experimental intermittent hypoxia models.

Main Methods:

  • Literature review of clinical investigations in OSA patients.
  • Analysis of basic research in animal and human models of intermittent hypoxia.

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Main Results:

  • Intermittent hypoxia can induce oxidative stress, inflammation, atherosclerosis, endothelial dysfunction, and hypertension.
  • Mechanisms identified in experimental models align with clinical observations in OSA patients.

Conclusions:

  • OSA is a significant risk factor for vascular disease.
  • Intermittent hypoxia is a key mediator of OSA-related vascular pathology.
  • Further research comparing clinical and experimental data is warranted.