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Coherent accumulation of ECG cardio-cycles

Analysis of electrocardiosignals for formation of the diagnostic features of post-traumatic myocardial dystrophy

N. G. Ivanushkina, K. О. Ivanko, Ye. S. Karplyuk, О. V. Chesnokova, I. А. Chaikovskiy, S. V. Sofienko, G. V. Mjasnikov

Abstract


The possibilities of high-resolution electrocardiography (HR ECG) application for diagnostics of post-traumatic myocardial dystrophy having multifactorial genesis is considered in this paper. Numerical processing and analysis of electrocardiograms that belong to patients from armed forces after explosive-driven injuries have been performed based on clinical studies. Complex method of cardiosignal analysis based on combination of wavelet analysis, eigenvector decomposition and principal component analysis is developed. This method revealed that low-amplitude deviations in ECG signal in case of post-traumatic myocardial dystrophy have low-frequency nature that is linked to slow electro-physiological processes. It is shown that these low-frequency, low-amplitude components appear at a high levels (8th and 9th) of decomposition in case of 9-level wavelet decomposition of averaged cardio cycles. Integral parameters for identification of post-traumatic myocardial dystrophy features are suggested and determined on the basis of principal component analysis. These parameters are squared sum of signal projections to eigenspaces Hk and mean eigenvalues of covariance matrices of electrocardiosignals ensembles λmean.

Keywords


HR ECG; post-traumatic myocardial dystrophy; wavelet analysis; eigenvector basis; principal component analysis

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References


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DOI: https://doi.org/10.3103/S0735272717090047

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