NDLI: Chaotic behavior of blood pressure and heart rate in the conscious dog

Content Provider	IEEE Xplore Digital Library
Author	Lovell, N. Henry, B. Celler, B. Brunner, M.
Copyright Year	1996
Description	Author affiliation: Graduate Sch. of Biomed. Eng., New South Wales Univ., Sydney, NSW, Australia (Lovell, N.)
Abstract	Initial studies in five conscious dogs with their baroreceptors either intact or surgically isolated, demonstrate that deterministic chaos is likely to exist In both heart interval and mean arterial blood pressure. The nature of this chaotic activity is not qualitatively different between the intact and open loop preparations. To assess nonlinear dynamical behavior, the authors constructed phase space trajectories from the time series data. The fractal dimension of the reconstructed trajectories was measured using the Grassberger-Procaccia algorithm. In four out of five dogs the fractal dimension of the reconstructed trajectory did not clearly converge for embedding dimensions up to 5. In one dog the fractal dimension of the attractor converged to a value between 2 and 3 for both heart interval and blood pressure in open and closed loop cases. Further evidence for deterministic chaos was provided by the reliability of data forecasts based on the fractal attractor.
Starting Page	1612
Ending Page	1613
File Size	265165
Page Count	2
File Format	PDF
ISBN	0780338111
DOI	10.1109/IEMBS.1996.647577
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-10-31
Publisher Place	Netherlands
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Chaos Blood pressure Heart rate Arterial blood pressure Fractals Dogs Pressure measurement Arteries Surgery Pressure control
Content Type	Text
Resource Type	Article

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