Study of the Lyapunov exponents of ECG signals from MIT-BIH database

Author

Casaleggio, A. ; Braiotta, S. ; Corana, A.

Author_Institution

Istituto per i Circuiti Elettronici, CNR, Genova, Italy

fYear

1995

fDate

10-13 Sept. 1995

Firstpage

697

Lastpage

700

Abstract

A preliminary analysis of the Lyapunov spectrum determination from a time-series with the Jacobian-based approach is presented. The method has been tested on the Lorenz attractor obtaining a good Lyapunov exponents estimate, then it has been applied to the study of ECG signals coming from the MIT-BIH Arrhythmia Database. We obtained almost always a positive first exponent confirming the chaotic nature of the electrical heart activity measured from surface EGG. However, the Lyapunov spectrum estimate is often influenced by the choice of some working parameters. The main purpose of this work is to gain insights on the influence of such working parameters on results.

Keywords

Jacobian matrices; Lyapunov matrix equations; chaos; electrocardiography; iterative methods; medical information systems; medical signal processing; signal sampling; time series; Arrhythmia Database; ECG signals; Jacobian-based approach; Lorenz attractor; Lyapunov exponents; Lyapunov spectrum; MIT-BIH database; chaotic nature; electrical heart activity; surface EGG; time-series; working parameters; Biomedical measurements; Chaos; Databases; Electrocardiography; Extraterrestrial measurements; Heart; Jacobian matrices; Phase measurement; Signal analysis; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 1995

Conference_Location

Vienna, Austria

Print_ISBN

0-7803-3053-6

Type

conf

DOI

10.1109/CIC.1995.482760

Filename

482760