Document Detail

Pulmonary hypertension and hypoxemia in obstructive sleep apnea syndrome.
MedLine Citation:
PMID:  8306039     Owner:  NLM     Status:  MEDLINE    
To determine whether pulmonary hypertension (PH) can occur in obstructive sleep apnea syndrome (OSAS) in the absence of lung or primary cardiac disease, we studied 27 patients (26 males, mean age 49 +/- 10 yr) with OSAS (respiratory disturbance index [RDI] > 10 events/h) in whom clinically significant lung or cardiac diseases were excluded. Pulsed Doppler measurements of pulmonary hemodynamics, pulmonary function tests, arterial blood gas analysis, and polysomnography were performed. A total of 11 OSAS patients (41%) were found to have pulmonary hypertension. The levels of PH were relatively mild (Ppa < or = 26 mm Hg). There were no differences between PH and non-PH patients in body mass index (BMI), smoking history, or lung function. PH patients were more hypoxemic when awake than non-PH patients (PaO2 = 72.2 +/- 7.6 versus 77.6 +/- 7.3 mm Hg, respectively; p < 0.05) but did not differ in severity of sleep apnea (RDI = 51.9 +/- 25.1 versus 56.8 +/- 26.2 events/h, respectively; p = NS) or indices of sleep desaturation. The hypoxemia in PH patients could not be explained by impairment of lung function, greater body mass, or a higher prevalence of smoking, and PaO2 in the study population was significantly correlated with Ppa (r = -0.46, p < 0.02) but not with FEV1 or BMI. We conclude that lung disease is not a prerequisite for PH in OSAS.(ABSTRACT TRUNCATED AT 250 WORDS)
D Sajkov; R J Cowie; A T Thornton; H A Espinoza; R D McEvoy
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of respiratory and critical care medicine     Volume:  149     ISSN:  1073-449X     ISO Abbreviation:  Am. J. Respir. Crit. Care Med.     Publication Date:  1994 Feb 
Date Detail:
Created Date:  1994-03-17     Completed Date:  1994-03-17     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9421642     Medline TA:  Am J Respir Crit Care Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  416-22     Citation Subset:  AIM; IM    
Department of Thoracic Medicine, Royal Adelaide Hospital, South Australia, Australia.
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MeSH Terms
Anoxia / etiology*
Echocardiography, Doppler
Hypertension, Pulmonary / diagnosis,  etiology*,  physiopathology
Middle Aged
Pulmonary Circulation / physiology*
Respiratory Function Tests
Sleep Apnea Syndromes / complications*

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