Are We Listening to Music or Noise? Use of the Lyapunov Exponent for Comprehensive Assessment of Heart Rate Complexity During Hemorrhage in Sedated Conscious Miniature Swine

Abstract

Objectives: Application of tools from nonlinear dynamics for calculation of changes in heart rate complexity assumes presence of deterministic chaotic trends in the investigated data. Calculation of the largest Lyapunov exponent (LLE) is a standard method for confirmation of whether such trends are present and is used to characterize the level of chaos in complex physiologic systems. We sought to evaluate the utility of LLE for that purpose during severe pump-controlled exponential hemorrhagic shock.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2009
Accession Number
ADA632122

Entities

People

  • Andriy I. Batchinsky
  • C. E. Wade
  • C. Necsoiu
  • E. Hagerman
  • J. Ward
  • John A. Burns
  • K. Walker Iii
  • L. Baer
  • L. C. Cancio
  • R. Nguyen

Organizations

  • United States Army Institute of Surgical Research

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Analysis Of Variance
  • Arteries
  • Blood
  • Blood Volume
  • Cardiovascular Physiological Phenomena
  • Data Sets
  • Heart Rate
  • Hemorrhage
  • Hemorrhagic Shock
  • Intervals
  • Mathematical Models
  • Models
  • Nonlinear Dynamics
  • Standards
  • Universities

Fields of Study

  • Medicine

Readers

  • Cardiovascular Physiology
  • Computational Modeling and Simulation
  • Wave Propagation and Nonlinear Chaotic Dynamics.