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Analysis of ECG from pole-zero models

Murthy, ISN and Prasad, GSSD (1992) Analysis of ECG from pole-zero models. In: IEEE transactions on bio-medical engineering, 39 (7). pp. 741-751.

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Abstract

A complete solution for the delineation of the ECG signal into its component waves is proposed from a system theoretic point of view. The discrete cosine transform (DCT) of a bell-shaped biphasic function is approximated mathematically by a system function with two poles and two zeros, i.e., of order (2,2). Using this concept as the basis, a pole-zero model of suitable order is derived from the DCT of the given signal using the Steiglitz-McBride method. This model is expanded into a unique set of partial fractions each of order (2,2), and a biphasic function is recovered from each one of these fractions in the inverse process. Each of the P and T waves usually requires only one biphasic function, while the QRS complex needs two or at most three such fractions. A one-to-one relationship between the pole pattern in the z-plane and component wave pattern in the time signal is established. Results of analysis of continuous strips of ECG show that the delineated component waves are in excellent agreement with the original waves both qualitatively and quantitatively

Item Type: Journal Article
Additional Information: Copyright of this article belongs to IEEE
Keywords: electrocardiography;physiological models;poles and zeros;waveform analysis;ECG analysis;ECG component waves;ECG signal delineation;QRS complex;Steiglitz-McBride method;bell-shaped biphasic function;discrete cosine;transform;mathematical approximation;partial fractions;pole-zero models;systems theory
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 20 Mar 2008
Last Modified: 19 Sep 2010 04:43
URI: http://eprints.iisc.ernet.in/id/eprint/13484

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