Document Detail

Increased aortic root size is associated with nocturnal hypoxia and diastolic blood pressure in obstructive sleep apnea.
MedLine Citation:
PMID:  22043131     Owner:  NLM     Status:  MEDLINE    
STUDY OBJECTIVES: Obstructive sleep apnea (OSA) is known as a major cardiovascular risk factor, and high prevalence of OSA has been reported in patients with thoracic aortic dissection. The aim of our study was to assess the relationship between OSA, its vascular consequences, and aortic root size.
DESIGN/PATIENTS: 156 newly diagnosed apneic patients free of cardiovascular disease and medication were included. Patients underwent cardiac ultrasound for measuring aortic root diameter, polysomnography, office and 24-h ambulatory blood pressure (BP) measurements, baroreflex sensitivity (BRS), and arterial stiffness evaluation by carotid-to-femoral pulse wave velocity (PWV).
MEASUREMENTS AND RESULTS: In univariate analysis, greater aortic root size was associated with older age (P = 0.03) and severity of OSA as expressed by mean nocturnal oxygen saturation (SpO2) (P = 0.015). Moreover, greater aortic root size was associated with higher diastolic BP, measured both clinically (P = 0.0005) or by 24-h ambulatory BP monitoring (P = 0.02), and PWV (P = 0.03). Mean nocturnal SpO(2) was correlated with BRS (P = 0.0008), thus potentially influencing BP values and arterial stiffness. In multivariate stepwise regression analysis, diastolic BP was the only significant factor for aortic root size (P = 0.0003).
CONCLUSIONS: In OSA patients, nocturnal hypoxemia decreased BRS and increased diastolic BP, which was the main factor influencing aortic root size.
Jean-Philippe Baguet; Caroline Minville; Renaud Tamisier; Frederic Roche; Gilles Barone-Rochette; Olivier Ormezzano; Patrick Levy; Jean-Louis Pepin
Publication Detail:
Type:  Comment; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-11-01
Journal Detail:
Title:  Sleep     Volume:  34     ISSN:  1550-9109     ISO Abbreviation:  Sleep     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-01     Completed Date:  2012-02-29     Revised Date:  2013-06-27    
Medline Journal Info:
Nlm Unique ID:  7809084     Medline TA:  Sleep     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1605-7     Citation Subset:  IM    
Cardiology Department, University Hospital, Grenoble, France.
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MeSH Terms
Aorta, Thoracic / physiopathology*,  ultrasonography*
Hypertension / complications*
Sleep Apnea, Obstructive / complications*
Comment On:
Sleep. 2010 Sep;33(9):1173-6   [PMID:  20857863 ]

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