Time-Frequency Analysis of Ventricular Late Potentials

H. Dickhaus; L. Khadra; J. Brachmann

doi:10.1055/s-0038-1635014

Methods of Information in Medicine, Table of Contents

Methods Inf Med 1994; 33(02): 187-195
DOI: 10.1055/s-0038-1635014

Original Article

Schattauer GmbH

Time-Frequency Analysis of Ventricular Late Potentials

H. Dickhaus

¹Department of Medical Informatics, University of Heidelberg and School of Technology Heilbronn

,

L. Khadra

²Dept. of Electrical Engineering, Jordan University of Science and Technology, Irbid, Jordan

,

J. Brachmann

³University Hospital of Heidelberg, Germany

› Author Affiliations

Abstract

Abstract:

The time-frequency characteristics are studied of averaged and filtered ECG records from 21 patients with sustained ventricular tachycardia and 29 healthy control subjects. Simulated data as well as real ECG records reveal the detection accuracy of the wavelet transform of signals with late potentials. The wavelet-transforms of preprocessed ECG signals are plotted in the time-frequency plane. These representations of the signals are well suited to describe the different characteristics of the patients and healthy subjects. A quantitative discrimination was performed with a sensitivity of 90% and a specificity of 72% by the energy underneath the squared modulus of the time-frequency distribution plots of the computed wavelet transforms.

Keywords

Wavelet Transformation - Wigner Transformation - Late Potentials - Ventricular Tachycardia - Time-Frequency Analysis

Full Text

References

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