Electrocardiogram frequency characteristics study by processing and analysis of the signal in time domain and spectral domain
Автор: Chereshnev Vitaly O., Proskurin Sergey G.
Журнал: Cardiometry @cardiometry
Рубрика: Review
Статья в выпуске: 17, 2020 года.
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This paper presents the results of a study in which cardiac signal of the first lead of a standard digital ECG system were processed. By filtering in the time domain, the cardiogram was clarified of noise that reduced influence of spectral harmonics by 10-15%. To present and classify frequency characteristics throughout the entire cardio signal, the QS section between the P and T peaks was smoothed. Due to the influence of sharp peaks on the results of spectral analysis, a result considerably differ from the sum of sinusoidal components is observed. The gap between the peaks is interpolated by the Lagrange polynomial since it did not show an influence on the resultant spectrum. The spectral representation revealed peaks with frequencies oddly even, 3.1 Hz and 6.2 Hz, corresponding to the P and T peaks. Based on the obtained results the frequencies corresponding to the remaining peaks of the cardiogram were also classified. The obtained results represent a spectrum of two regular harmonics what allows for further adequate diagnostics of ECG signals.
Digital electrocardiogram, ecg smoothing, spectral analysis
Короткий адрес: https://sciup.org/148311473
IDR: 148311473 | DOI: 10.12710/cardiometry.2020.17.3033
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