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 |
|---|---|
| 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) |
|---|---|
| City | San Diego, CA, USA |
| Period | 10/28/93 → 10/31/93 |
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ASJC Scopus subject areas
- Bioengineering
Cite this
Time-variant auto regressive spectral analysis for the detection of ventricular late potentials. / Bianchi, A. M.; Mainardi, L. T.; Castiglioni, D.; Vecchia, L. Dalla; Lomabardi, F.; Cerutti, S.
Proceedings of the Annual Conference on Engineering in Medicine and Biology. ed. / Andrew Y.J. Szeto; Rangaraj M. Rangayyan. Vol. 15 pt 2. ed. Publ by IEEE, 1993. p. 719-720.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Time-variant auto regressive spectral analysis for the detection of ventricular late potentials
AU - Bianchi, A. M.
AU - Mainardi, L. T.
AU - Castiglioni, D.
AU - Vecchia, L. Dalla
AU - Lomabardi, F.
AU - Cerutti, S.
PY - 1993
Y1 - 1993
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0027887515&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027887515&partnerID=8YFLogxK
M3 - Conference contribution
SN - 0780313771
VL - 15
SP - 719
EP - 720
BT - Proceedings of the Annual Conference on Engineering in Medicine and Biology
A2 - Szeto, Andrew Y.J.
A2 - Rangayyan, Rangaraj M.
PB - Publ by IEEE
ER -