Cited by 185Obstructive Sleep Apnea ResearchBlood Pressure and Hypertension StudiesSleep and related disorders

Obstructive sleep apnea syndrome and hypertension: ambulatory blood pressure

Open access
Kario, Kazuomi·2009·Hypertension Research

Abstract

Obstructive sleep apnea syndrome (OSAS) is an independent risk factor for hypertension and cardiovascular disease. OSAS is the frequent underlying disease of secondary hypertension and resistant hypertension. OSAS increases both daytime and night-time ambulatory blood pressures through the activation of various neurohumoral factors including the sympathetic nervous system and the renin-angiotensin-aldosterone system. In particular, OSAS predominantly increases ambulatory BP during sleep compared with the awake period, with the result that OSAS is likely to be associated with the non-dipping pattern (diminished nocturnal BP fall) or riser pattern (higher sleep BP than awake BP) of nocturnal BP. An additional characteristic of ABP in OSAS is increased BP variability. The newly developed non-invasive hypoxia-trigger BP-monitoring system detected marked midnight BP surges (ranging from around 10 to 100 mm Hg) during sleep in OSAS patients. The exaggerated BP surge may trigger OSAS-related cardiovascular events occurring during sleep. Clinically, as nocturnal hypoxia is the determinant of morning minus evening BP difference (ME difference), OSAS should be strongly suspected when morning BP cannot be controlled <135/85 mm Hg with increased ME difference even by the specific antihypertensive medications targeting morning hypertension such as bedtime dosing of antihypertensive drugs. Understanding the characteristics of OSAS-related hypertension is essentially important to achieve perfect BP control over a 24-h period, including the sleep period, for more effective prevention of cardiovascular disease.

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  • Repeated episodes of hypoxia, either from obstructive sleep apnea or experimental induction, result in elevation of blood pressure and altered metabolic function.

    “Repeated episodes of hypoxia, either occurring as a result of obstructive sleep apnea 35 or because of experimental induction, both result in elevation of blood pressure 36 and altered metabolic function.37”

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Research works printed but not linked: 2

  1. Tamargo J, van Zwieten P, Waeber B, Williams B. Management of Arterial Hypertension of the European Society of Hypertension; European Society of Cardiology. J Hypertens 2007; 25: 1105-1187.
  2. Kario K. Clinician's Manual on Early Morning Risk Management in Hypertension. Science Press: London, 2004, pp 1-68.

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Authors
Kario, K.
Affiliations
Jichi Medical University (JP)
Corresponding author
Kario, Kazuomi
Venue
Hypertension Research
Published
2009-06
Volume
32
Issue
6
Pages
428-432
ISSN
  • 0916-9636 (ISSN-L)
  • 1348-4214
OpenAlex
W2043054498
Cited by
185
References
34
Citations by year
2026: 2 · 2025: 13 · 2024: 9 · 2023: 8 · 2022: 11 · 2021: 5 · 2020: 11 · 2019: 12 · 2018: 13 · 2017: 14 · 2016: 20 · 2015: 18 · 2014: 14 · 2013: 5 · 2012: 14
FWCI
1.10
Type
journal article
Language
en
Open access
Locations
  • Hypertension Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Obstructive Sleep Apnea Research
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
obstructive sleep apnea, hypertension, ambulatory blood pressure, nocturnal blood pressure, non-dipping pattern, blood pressure variability, nocturnal hypoxia, resistant hypertension, secondary hypertension, sympathetic nervous system, renin-angiotensin-aldosterone system, cardiovascular risk
MeSH terms
Animals, Blood Pressure, Circadian Rhythm, Drug Resistance, Humans, Hypertension, Renin-Angiotensin System, Blood Pressure Monitoring, Ambulatory, Sleep Apnea, Obstructive

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