Document Detail

Reduced cerebral blood flow during wakefulness in obstructive sleep apnea-hypopnea syndrome.
MedLine Citation:
PMID:  18041484     Owner:  NLM     Status:  MEDLINE    
STUDY OBJECTIVES: To investigate changes in regional cerebral blood flow (rCBF) in patients with obstructive sleep apnea-hypopnea syndrome (OSAHS).
DESIGN: We compared the 99mTc-ethylcysteinate dimer (ECD) single photon emission computed tomography (SPECT) images of patients with OSAHS with those of age- and sex-matched healthy volunteers.
SETTING: University hospital.
PATIENTS AND PARTICIPANTS: Twenty-seven patients with severe OSAHS and 27 healthy volunteers underwent 99mTc-ECD brain SPECT studies.
INTERVENTION: For statistical parametric mapping analysis, all SPECT images were spatially normalized to the standard SPECT template and then smoothed using a 14-mm full-width at half-maximum Gaussian kernel. The Student t test was used for the statistical analysis.
MEASUREMENTS AND RESULTS: The mean age of patients and subjects was 44.3 years (range 31-58). All patients underwent overnight polysomnography. The mean apnea-hypopnea index of patients was 60.4 +/- 17.6 per hour (range 33 -104), indicating severe OSAHS. All patients snored heavily and had daytime sleepiness (mean Epworth Sleepiness Scale score, 10.7 +/- 3.7, range 6-12). Statistical parametric mapping analysis showed that rCBF in patients with OSAHS was significantly reduced in bilateral parahippocampal gyri and in the right lingual gyrus, as compared with that of healthy volunteers (P < 0.05 with false discovery rate correction). Moreover, apnea-hypopnea indexes of patients were negatively correlated with rCBF in the right pericentral gyrus and right cuneus at uncorrected P < 0.001.
CONCLUSIONS: Our results show the altered rCBF pattern in bilateral parahippocampal gyri, right lingual gyrus, pericentral gyrus, and cuneus in patients with severe OSAHS. These findings may partly explain the deficit in memory, spatial learning, executive function, and attention, which are frequently found in patients with OSAHS.
Eun Yeon Joo; Woo Suk Tae; Sun Jung Han; Jae-Wook Cho; Seung Bong Hong
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Sleep     Volume:  30     ISSN:  0161-8105     ISO Abbreviation:  Sleep     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-11-28     Completed Date:  2008-02-19     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  7809084     Medline TA:  Sleep     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1515-20     Citation Subset:  IM    
Department of Neurology, Samsung Medical Center Sungkyunkwan University School of Medicine, Seoul, South Korea.
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MeSH Terms
Body Mass Index
Brain / anatomy & histology,  blood supply*,  radionuclide imaging
Cerebrovascular Circulation / physiology
Magnetic Resonance Imaging
Middle Aged
Sleep Apnea, Obstructive / diagnosis,  physiopathology*
Tomography, Emission-Computed, Single-Photon
Wakefulness / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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