Time-variant auto regressive spectral analysis for the detection of ventricular late potentials

A. M. Bianchi; L. T. Mainardi; D. Castiglioni; L. Dalla Vecchia; F. Lomabardi; S. Cerutti

Time-variant auto regressive spectral analysis for the detection of ventricular late potentials

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

Istituti Clinici Scientifici Maugeri Spa – Società Benefit

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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

ASJC Scopus subject areas

Bioengineering

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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

Bianchi, AM, Mainardi, LT, Castiglioni, D, Vecchia, LD, Lomabardi, F & Cerutti, S 1993, Time-variant auto regressive spectral analysis for the detection of ventricular late potentials. in AYJ Szeto & RM Rangayyan (eds), Proceedings of the Annual Conference on Engineering in Medicine and Biology. pt 2 edn, vol. 15, Publ by IEEE, pp. 719-720, Proceedings of the 15th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 2 (of 3), San Diego, CA, USA, 10/28/93.

Bianchi, A. M. ; Mainardi, L. T. ; Castiglioni, D. ; Vecchia, L. Dalla ; Lomabardi, F. ; Cerutti, S. / Time-variant auto regressive spectral analysis for the detection of ventricular late potentials. Proceedings of the Annual Conference on Engineering in Medicine and Biology. editor / Andrew Y.J. Szeto ; Rangaraj M. Rangayyan. Vol. 15 pt 2. ed. Publ by IEEE, 1993. pp. 719-720

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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.",

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AU - Lomabardi, F.

AU - Cerutti, S.

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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.

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