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자료유형
학술저널
저자정보
저널정보
대한고혈압학회 Clinical Hypertension Clinical Hypertension 제20권 제2호
발행연도
2014.1
수록면
42 - 50 (9page)

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Background: Obstructive sleep apnea (OSA) has been shown to be an important risk factor for metabolic syndrome andcardiovascular disease. Endothelial dysfunction plays a pivotal role in the pathophysiology of these diseases. However, littleis known about the relationship between sleep apnea and microvascular endothelial dysfunction, as assessed by digitalreactive hyperemia. Methods: The study population consisted of 80 patients (mean age, 48 ± 12 years-old; 65 men; 59hypertensive). We measured apnea–hypopnea index (AHI) and mild OSA was defined as 5 < AHI <15 and moderate tosevere OSA as AHI ≥ 15. Reactive hyperemia index (RHI) derived from peripheral arterial tonometry (PAT) asmeasurement of endothelium-mediated vasodilatation. Results: There were 61 OSA patients in the study population (AHI,21.5 ± 16.7 vs. 2.7 ± 1.6 in non-OSA; p < 0.001). There were no significant difference in RHI and peripheral augmentation index(pAIx) between OSA and non-OSA group (RHI, 2.04 ± 0.48 vs. 2.06 ± 0.42; p = 0.894; pAIx, 21.7% ± 24.0% vs. 21.7% ±30.0%; p = 1.000, respectively). Also, there was no significant difference in RHI and pAIx between mild (n = 31) andmoderate to severe (n = 30) OSA group (RHI, 2.10 ± 0.47 vs. 1.98 ± 0.49; p = 0.333; pAIx, 24.2% ± 20.7% vs. 19.0% ± 27.2%;p = 0.407, respectively), either. Overall, no significant correlation between AHI and RHI was observed (r = -0.023, p = 0.837). The other OSA severity indices such as oxygen desaturation index, mean and minimum oxygen saturation were not correlatedwith RHI or pAIx. In the subgroup analysis for the OSA group, we could not find any significant relationships between AHIand PAT parameters, either. Conclusions: OSA was not observed to be associated with reactive hyperemia measured by PAT.

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