Frequency-domain analysis of ventricular late potentials through time-variant autoregressive models

A. M. Bianchi, L. T. Mainardi, D. Castiglioni, F. Lombardi, L. Dalla Vecchia, S. Cerutti

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper we propose an analysis of the high resolution ECG signal in the frequency domain which is focused on the ending part of the QRS complex and on the ST segment of the averaged modulus of the vectorcardiogram, in order to detect the presence of ventricular late potentials (VLP's). The influence of the QRS is excluded through a Tchebytcheff polynomial interpolation. Such a 'filtered' signal is then analyzed by means of a time variant autoregressive model that allows to obtain a power spectral density in correspondence of each sample and thus to track the dynamical changes in its frequency content. A joint time-frequency representation is obtained which may qualitatively discriminate between populations with or without VLP's. Finally, some parameters are proposed, such as the time duration, the associated power, the starting and ending points and the main frequency of the VLP's, through which it is possible to quantify the abnormal signal averaged ECG.

Original languageEnglish
Title of host publicationComputers in Cardiology
PublisherPubl by IEEE
Pages439-442
Number of pages4
ISBN (Print)0818654708
Publication statusPublished - 1993
EventProceedings of the 1993 Conference on Computers in Cardiology - London, UK
Duration: Sep 5 1993Sep 8 1993

Other

OtherProceedings of the 1993 Conference on Computers in Cardiology
CityLondon, UK
Period9/5/939/8/93

ASJC Scopus subject areas

  • Software
  • Cardiology and Cardiovascular Medicine

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  • Cite this

    Bianchi, A. M., Mainardi, L. T., Castiglioni, D., Lombardi, F., Vecchia, L. D., & Cerutti, S. (1993). Frequency-domain analysis of ventricular late potentials through time-variant autoregressive models. In Computers in Cardiology (pp. 439-442). Publ by IEEE.