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Heart-rate variability in women during 40-hour prolonged wakefulness

Anders, Doreen and Vollenweider, Stephanie and Cann, Judith and Hofstetter, Marcel and Flammer, Josef and Orgül, Selim and Kräuchi, Kurt. (2010) Heart-rate variability in women during 40-hour prolonged wakefulness. Chronobiology international, Vol. 27, H. 8. pp. 1609-1628.

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Official URL: http://edoc.unibas.ch/dok/A6005606

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Abstract

Heart-rate variability patterns of 18 women during a 40-h constant routine of prolonged wakefulness under controlled laboratory conditions were analyzed. The authors tested the circadian timing of the autonomic nervous system and the relationship between the sympathetic and vagal branches in women with both a functional disorder of vascular regulation (main symptom: cold hands and feet) and prolonged sleep onset and controls without these symptoms. Spectral analysis of R-R intervals during paced breathing episodes revealed significantly lower power values in the high-frequency band (HF; 0.15-0.4 Hz) but not in the low-frequency band (LF; 0.04-0.15 Hz), leading to a significantly elevated LF/HF ratio in the former group. A significant circadian rhythm in LF power and heart rate occurred in both groups, and a significant correlation was found between sleepiness and sympathovagal balance (r = .53, p > .05). These findings indicate not only an autonomic imbalance in the first group compared with controls, but also two strategies of the autonomic nervous system to fight against fatigue in women. One implies circadian control and the other homeostatic control, and both are reflected by the LF/HF ratio.
Faculties and Departments:03 Faculty of Medicine > Bereich Spezialfächer (Klinik) > Ehemalige Einheiten Spezialfächer (Klinik) > Ophthalmologie (Flammer)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Spezialfächer (Klinik) > Ehemalige Einheiten Spezialfächer (Klinik) > Ophthalmologie (Flammer)
03 Faculty of Medicine > Bereich Spezialfächer (Klinik) > Ophthalmologie USB > Ophthalmologie (Orgül)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Spezialfächer (Klinik) > Ophthalmologie USB > Ophthalmologie (Orgül)
UniBasel Contributors:Flammer, Josef and Orgül, Selim
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Taylor & Francis
ISSN:1525-6073
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:07 Dec 2012 13:04
Deposited On:07 Dec 2012 13:03

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