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. 2018 Mar;20(3):575-581.
doi: 10.1111/jch.13202. Epub 2018 Jan 16.

The association between different features of sleep-disordered breathing and blood pressure: A cross-sectional study

Shayan Khoshkish  1 , Mathias Hohl  1 , Benedikt Linz  1 , Michael Arzt  2 , Felix Mahfoud  1 , Mathias Baumert  3 , Jakob Schöpe  4 , Michael Böhm  1 , Dominik Linz  1   5
Affiliations

The association between different features of sleep-disordered breathing and blood pressure: A cross-sectional study

Shayan Khoshkish et al. J Clin Hypertens (Greenwich). 2018 Mar.

Abstract

Sleep disordered breathing (SDB) is highly prevalent in patients with high blood pressure (BP). Severity of SDB can be evaluated by the number of apneas and hypopneas per hour (AHI) or by measures of hypoxia. The objective of this study was to assess the association between different measures of SDB and BP. In 134 consecutive patients, polygraphy was performed to determine the AHI. Pulse oximetry was used to determine hypoxemic burden (time below 90% oxygen saturation [T90] and hypoxia load [HL], representing the integrated area above the curve of desaturation). AHI did not correlate with systolic and diastolic BP or pulse pressure. In contrast, HL correlated with pulse pressure during the day (P = .01) and night (P = .0034) before and after adjustment for body mass index. The correlation between systolic BP and HL at night disappeared following adjustment for body mass index. This study generates the hypothesis that nocturnal hypoxemic burden may represent a suitable marker of BP pattern and a potential treatment target in hypertensive patients.

Keywords: blood pressure; hypertension; hypoxia; pulse pressure; sleep apnea.

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Conflict of interest statement

None.

Figures

Figure 1
Figure 1
Correlation between the apnea‐hypopnea‐index (AHI) and the time below 90% saturation (T90, A) as well as the hypoxia load (HL, B). AHI, apneas and hypopneas per hour; HL, hypoxia load
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