Analysis of low-amplitude signals of cardiac electrical activity

N. G. Ivanushkina; K. О. Ivanko; Vladimir I. Timofeyev

doi:10.3103/S0735272714100057

Authors

N. G. Ivanushkina Igor Sikorsky Kyiv Polytechnic Institute, Ukraine https://orcid.org/0000-0001-8389-7906
K. О. Ivanko Igor Sikorsky Kyiv Polytechnic Institute, Ukraine https://orcid.org/0000-0002-3842-2423
Vladimir I. Timofeyev National Technical University of Ukraine "Kyiv Polytechnic Institute", Ukraine https://orcid.org/0000-0003-0515-1580

DOI:

https://doi.org/10.3103/S0735272714100057

Keywords:

cardiac electrical activity, late atrial and ventricular potentials, abdominal electrocardiosignals, fetal and maternal cardiac cycles, wavelet analysis, method of blind source separation, principal component analysis, independent component analysis

Abstract

A non-invasive approach to estimation of the condition of cardiovascular system has been considered. This approach is based on detection of subtle manifestations of cardiac electrical activity using the high resolution technologies in electrocardiography. Combined methods of analysis of low-amplitude components of electrocardiosignals were developed. They are intended for detection of late potentials representing pathological cardiac electrical activity and also for the separation of fetal and maternal electrocardiosignals obtained during the abdominal recording. Combining of methods is based on the creation of eigensubspaces of signals and noise at different combinations of the decomposition of eigenvectors in basis, the principal component analysis, analysis of independent components, and the wavelet analysis. The conducted numerical examples show that the proposed methods make it possible to eliminate noises and interferences in recorded electrocardiograms, and also to detect the morphology changes of waves and complexes of cardiac cycles. This enables us to perform early diagnostics in the case of pathology.

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