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Increased arterial vascular tone during the night in patients with essential hypertension

Journal of Human Hypertension volume 21, pages 60–67 (2007)Cite this article

Abstract

The time-dependent incidence of cardiovascular events points to an important role of chronobiology for arterial properties. To evaluate arterial properties in patients with essential hypertension, we assessed arterial vascular tone during sleep at night in patients with essential hypertension and normotensive control subjects. Vascular tone was continuously quantified by the reflective index obtained by non-invasive digital photoplethysmography and an algorithm for continuous, investigator-independent, automatic analysis of digital volume pulse. During the first half of the night, the reflective index was significantly higher in 31 patients with essential hypertension compared to 30 normotensive control subjects (30.0±0.2 vs 28.8±0.2; P=0.001). In patients with essential hypertension, the reflective index significantly increased from 30.0±0.2 in the first half (from 2301 to 0230) to 30.7±0.2 in the second half (from 0231 to 0600) of the night (n=31; P=0.027). In normotensive control subjects the reflective index also significantly increased from 28.8±0.2 in the first half of the night to 30.2±0.2 in the second half of the night (n=30; P=0.001). An increase of the reflective index tone indicated systemic vasoconstriction as confirmed by cold pressure tests and a significant correlation between arterial vascular tone and sympathetic nerve activity measured by microneurography from the peroneal nerve. Photoplethysmographic determination of arterial vascular tone demonstrated a significant increase of systemic arterial vascular tone in patients with essential hypertension during the first half of the night compared to normotensive control subjects.

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Authors and Affiliations

  1. Charité Campus Benjamin Franklin, Med. Klinik IV, Berlin, Germany

    A Scholze, A Burkert, K Mardanzai, S Suvd-Erdene, W Zidek & M Tepel

  2. Department of Medicine D, University of Muenster Hospital and Clinics, Muenster, Germany

    M Hausberg

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  1. A Scholze
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  2. A Burkert
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  3. K Mardanzai
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  4. S Suvd-Erdene
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  5. M Hausberg
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  6. W Zidek
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  7. M Tepel
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Correspondence to M Tepel.

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Scholze, A., Burkert, A., Mardanzai, K. et al. Increased arterial vascular tone during the night in patients with essential hypertension. J Hum Hypertens 21, 60–67 (2007). https://doi.org/10.1038/sj.jhh.1002097

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  • DOI: https://doi.org/10.1038/sj.jhh.1002097

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