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 Nonlinear properties of cardiac rhythm abnormalities.


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Type of Resource: text

Genre: article

Issuance: single unit

Date Issued: 1999-03

Publisher: The American Physical Society

Language(s): English

Identifier: 165473 (digitool), FADT165473 (IID), fau:2605 (fedora)

FAU Department/College: Department of Psychology Charles E. Schmidt College of Science

Note(s): Many physical processes have distributions of times between events that have non-normalizable, power law probability density functions PDF’s. The moments of such distributions are not defined. We found that the PDF’s of the times between events of ventricular tachyarrhythmia rapid heart rate and premature ventricular contractions have a power law form indicative of a non-normalizable distribution, and that the timing between these events cannot be meaningfully characterized by the mean frequency of such events. The Hurst analysis showed that there were self-similar correlations in the data. These results indicate that the physical processes that disrupt the normal rhythm of the heart produce a fractal pattern in the timing between these events. It also suggests that the mean and the variance of the frequency of these events may not be good measures to assess the status of patients with these arrhythmias and determine the effectiveness of therapeutic procedures.This manuscript is a version of an article published in Physical Review E v. 59, no. 3 (March 1999) p.3312-3319 http://link.aps.org/doi/10.1103/PhysRevE.59.3312

Subject(s): Biophysics--ResearchMedicine-MathematicsArrythmia--therapyFractalsNonlinear systemsProbabilities-Mathematical Models

Persistent Link to This Record: http://purl.flvc.org/fau/165473

Links: http://dx.doi.org/10.1103/PhysRevE.59.3312

Restrictions on Access: ©1999 The American Physical Society

Owner Institution: FAU



Autor: Liebovitch, Larry S., creator Todorov, Angelo T., creator Zochowski, Michal, creator Scheurle, Daniela, creator Colgin, Laura, cr

Fuente: http://fau.digital.flvc.org/islandora/object/fau%3A2605



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