V.N. Krutko, V.V. Pirvu, A.Ya. Chizhov

The possibilities to extract additional information about the electrical activity of the heart from the amplitude and phase of the spectral characteristics of the electrocardiogram (ECG) were investigated. 50 the digitized sections of the ECG from database «MIT-BIH Arrhythmia Database», data archive ECG signals - «PhysioBank» was used. Recovery of the ECG signal only on the base of amplitude-frequency characteristics of the spectrum is accompanied by distortion of the signal and the loss of its important components. Significantly better the ECG signal is reconstructed from the phase-frequency characteristics of the spectrum. So, it is shown that the phase values of the harmonics of the ECG spectrum carry important information about electrocardiosignals, which can be used in the future to create new methods of ECG analysis with a higher level of information content.

 

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