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A new modeling of the overlapping T wave for the efficient estimation of the P-R intervals during exercise and recovery.

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  • 1Laboratory I3S-CNRS, University of Nice-Sophia Antipolis, 2000 Route des Lucioles, Sophia Antipolis cedex, France. cabasson@i3s.unice.fr

Abstract

The analysis of the heart period series is a difficult task especially under graded exercise conditions. Having a good tool to characterize the P-R and R-R intervals, i.e. a good method of time delay estimation, would carry out a better knowledge of the neural activity during exercise and recovery in the field of pacemaker's design. Unfortunately, for the P-R intervals, the problem of estimation has been rarely addressed. In this paper, we propose a new method for estimating the P-R intervals based on an iterative Maximum-Likelihood approach. The main contribution is to take into account the overlapping T wave on ECG recorded during exercise. The goal of this study is to compute a model of the T wave which overlaps the P wave and then to cancel this influence before the determination of the P-R intervals.

PMID:
18002031
[PubMed - indexed for MEDLINE]
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