Sleep-wake differences in scaling behavior of the human heartbeat: Analysis of terrestrial and long-term space flight data

We compare scaling properties of the cardiac dynamics during sleep and wake periods for healthy individuals, cosmonauts during orbital flight, and subjects with severe heart disease. For all three groups, we find a greater degree of anticorrelation in the heartbeat fluctuations during sleep compared...

Full description

Saved in:
Bibliographic Details
Published in:Europhysics letters 1999-12, Vol.48 (5), p.594-600
Main Authors: Ivanov, P. Ch, Bunde, A, Amaral, L. A. N, Havlin, S, Fritsch-Yelle, J, Baevsky, R. M, Stanley, H. E, Goldberger, A. L
Format: Article
Language:English
Subjects:
87.10.+e
87.19.Hh
87.19.Jj
Astronauts
Cardiovascular Physiological Phenomena
Heart Failure - physiopathology
Heart Rate - physiology
Humans
Life Sciences (General)
Sleep - physiology
Space Flight
Space life sciences
Wakefulness - physiology
Weightlessness
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We compare scaling properties of the cardiac dynamics during sleep and wake periods for healthy individuals, cosmonauts during orbital flight, and subjects with severe heart disease. For all three groups, we find a greater degree of anticorrelation in the heartbeat fluctuations during sleep compared to wake periods. The sleep-wake difference in the scaling exponents for the three groups is comparable to the difference between healthy and diseased individuals. The observed scaling differences are not accounted for simply by different levels of activity, but appear related to intrinsic changes in the neuroautonomic control of the heartbeat.
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i1999-00525-0