Abstract
A procedure of frequency domain analysis of Ventricular Late Potentials (VLP's) is proposed and tested on simulated signals and real recordings of high-resolution vectorcardiogram (VCG). The analysis is focused on the ending part of the QRS complex and on the ST segment of the averaged VCG. Firstly a Tchebytcheff polynomial interpolation is used in order to eliminate the QRS low frequency influence, and then the 'filtered' signal is analyzed by means of a time-variant autoregressive model that allows to evaluate a power spectral density (PSD) in correspondence of each sample and thus to track, in the frequency domain, the dynamical modification of the signal. A joint time-frequency representation is obtained that qualitatively enhances the differences between patients with and without VLP's. In addition some indices are introduced in order to give a quantitative description of the phenomenon.
Original language | English |
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Title of host publication | Proceedings of the Annual Conference on Engineering in Medicine and Biology |
Editors | Andrew Y.J. Szeto, Rangaraj M. Rangayyan |
Publisher | Publ by IEEE |
Pages | 719-720 |
Number of pages | 2 |
Volume | 15 |
Edition | pt 2 |
ISBN (Print) | 0780313771 |
Publication status | Published - 1993 |
Event | Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 2 (of 3) - San Diego, CA, USA Duration: Oct 28 1993 → Oct 31 1993 |
Other
Other | Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 2 (of 3) |
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City | San Diego, CA, USA |
Period | 10/28/93 → 10/31/93 |
ASJC Scopus subject areas
- Bioengineering