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Autonomic control of the cardiovascular system during sleep in normal subjects.
Eur J Appl Physiol. 2002 Jun; 87(2):174-81.EJ

Abstract

The autonomic control of heart rate and blood pressure during sleep is controversial: although it has been reported that vagal activity is more often lower in rapid eye movement sleep (REM) than in other stages of sleep (non-REM, NREM), the opposite has also been described. Initially, it was reported that baroreflex sensitivity (BRS) increases during sleep (REM and NREM), but in later studies, this was only partially confirmed. We therefore studied autonomic control of the cardiovascular (CV) system during sleep in 12 normal adults. The spectral components of the heart rate R-R interval, blood pressure (BP), and BRS were computed at low (LF) and actual breathing frequency (high frequency, HF). Analysis of sleep stage and a cycle-by-cycle stage II analysis were performed. CV variability is affected largely by sleep-stage and sleep-cycle organisation: NREM and the last cycle exhibit the greatest vagal activity and the lowest sympathetic activity. BRS estimation for both the LF and HF bands confirmed previous results obtained by pharmacological and spontaneous slope methods: BRS is greater during sleep than during nocturnal wake periods, and further increased in REM. BRS is frequency dependent: in NREM, the higher value of HF BRS compared to LF BRS favours the HF control of BP variability, whereas higher BRS HF and LF components contribute to the strongest control in REM. BRS variability exhibits no significant pattern during the night. Our results suggest that both sleep-cycle organisation and BRS estimation in the LF and HF bands should be considered in sleep studies of autonomic CV control.

Authors+Show Affiliations

INRIA. Rocquencourt 78153 Le Chesnay, France.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12070629

Citation

Monti, A, et al. "Autonomic Control of the Cardiovascular System During Sleep in Normal Subjects." European Journal of Applied Physiology, vol. 87, no. 2, 2002, pp. 174-81.
Monti A, Medigue C, Nedelcoux H, et al. Autonomic control of the cardiovascular system during sleep in normal subjects. Eur J Appl Physiol. 2002;87(2):174-81.
Monti, A., Medigue, C., Nedelcoux, H., & Escourrou, P. (2002). Autonomic control of the cardiovascular system during sleep in normal subjects. European Journal of Applied Physiology, 87(2), 174-81.
Monti A, et al. Autonomic Control of the Cardiovascular System During Sleep in Normal Subjects. Eur J Appl Physiol. 2002;87(2):174-81. PubMed PMID: 12070629.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Autonomic control of the cardiovascular system during sleep in normal subjects. AU - Monti,A, AU - Medigue,C, AU - Nedelcoux,H, AU - Escourrou,P, Y1 - 2002/04/26/ PY - 2002/02/01/accepted PY - 2002/6/19/pubmed PY - 2003/1/23/medline PY - 2002/6/19/entrez SP - 174 EP - 81 JF - European journal of applied physiology JO - Eur J Appl Physiol VL - 87 IS - 2 N2 - The autonomic control of heart rate and blood pressure during sleep is controversial: although it has been reported that vagal activity is more often lower in rapid eye movement sleep (REM) than in other stages of sleep (non-REM, NREM), the opposite has also been described. Initially, it was reported that baroreflex sensitivity (BRS) increases during sleep (REM and NREM), but in later studies, this was only partially confirmed. We therefore studied autonomic control of the cardiovascular (CV) system during sleep in 12 normal adults. The spectral components of the heart rate R-R interval, blood pressure (BP), and BRS were computed at low (LF) and actual breathing frequency (high frequency, HF). Analysis of sleep stage and a cycle-by-cycle stage II analysis were performed. CV variability is affected largely by sleep-stage and sleep-cycle organisation: NREM and the last cycle exhibit the greatest vagal activity and the lowest sympathetic activity. BRS estimation for both the LF and HF bands confirmed previous results obtained by pharmacological and spontaneous slope methods: BRS is greater during sleep than during nocturnal wake periods, and further increased in REM. BRS is frequency dependent: in NREM, the higher value of HF BRS compared to LF BRS favours the HF control of BP variability, whereas higher BRS HF and LF components contribute to the strongest control in REM. BRS variability exhibits no significant pattern during the night. Our results suggest that both sleep-cycle organisation and BRS estimation in the LF and HF bands should be considered in sleep studies of autonomic CV control. SN - 1439-6319 UR - https://www.unboundmedicine.com/medline/citation/12070629/Autonomic_control_of_the_cardiovascular_system_during_sleep_in_normal_subjects_ L2 - https://dx.doi.org/10.1007/s00421-002-0597-1 DB - PRIME DP - Unbound Medicine ER -