AJP - Regu Fuel your research with LabChart
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Am J Physiol Regul Integr Comp Physiol 272: R1149-R1154, 1997;
0363-6119/97 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kanters, J. K.
Right arrow Articles by Holstein-Rathlou, N. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Kanters, J. K.
Right arrow Articles by Holstein-Rathlou, N. H.

AJP - Regulatory, Integrative and Comparative Physiology, Vol 272, Issue 4 1149-R1154, Copyright © 1997 by American Physiological Society

ARTICLES

Influence of forced respiration on nonlinear dynamics in heart rate variability

J. K. Kanters, M. V. Hojgaard, E. Agner and N. H. Holstein-Rathlou
Department of Internal Medicine, Coronary Care Unit, Elsinore Hospital, Helsingor, Denmark.

Although it is doubtful whether the normal sinus rhythm can be described as low-dimensional chaos, there is evidence for inherent nonlinear dynamics and determinism in time series of consecutive R-R intervals. However, the physiological origin for these nonlinearities is unknown. The aim of this study was to test whether the known nonlinear input from spontaneous respiration is a source for the nonlinearities in heart rate variability. Twelve healthy subjects were examined in supine position with 3-h electrocardiogram recordings during both spontaneous and forced respiration in accordance with a metronome set to 12 min(-1). Nonlinear dynamics were measured as the correlation dimension and the nonlinear prediction error. Complexity expressed as correlation dimension was unchanged from normal respiration, 9.1 +/- 0.5, compared with forced respiration, 9.3 +/- 0.6. Also, nonlinear determinism expressed as the nonlinear prediction error did not differ between spontaneous respiration, 32.3 +/- 3.4 ms, and forced respiration, 31.9 +/- 5.7. It is concluded that the origin of the nonlinear dynamics in heart rate variability is not a nonlinear input from the respiration into the cardiovascular oscillator. Additional studies are needed to elucidate the mechanisms behind the nonlinear dynamics in heart rate variability.


This article has been cited by other articles:


Home page
 Am. J. Physiol. Heart Circ. Physiol.Home page
F. Beckers, B. Verheyden, and A. E. Aubert
Aging and nonlinear heart rate control in a healthy population
Am J Physiol Heart Circ Physiol, June 1, 2006; 290(6): H2560 - H2570.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Heart Circ. Physiol.Home page
K. Suder, F. R. Drepper, M. Schiek, and H.-H. Abel
One-dimensional, nonlinear determinism characterizes heart rate pattern during paced respiration
Am J Physiol Heart Circ Physiol, September 1, 1998; 275(3): H1092 - H1102.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online