Abstract
The article proposes a method of phase representation of dynamic systems for the analysis of pulse waves. A phase portrait is constructed, which is a set of phase trajectories obtained over a certain period of time. The technique of quantitative assessment of the blood ejection intensity in the rapid ejection phase of the cardiac cycle by a pulse wave is substantiated. It establishes quantitative criteria for the blood ejection intensity parameter in chronic and acute forms of diseases. Phase portraits of pulse waves are investigated. It is shown that the contour of the phase portrait mainly reflects the pulse wave amplitude parameters and intensity of the fast and slow ejection phases. The main qualitative regularities of various types of pulse waves are revealed. A quantitative indicator characterizing the geometry of the phase portrait is introduced and experimentally investigated. It allows you to differentiate pulse waves for their compliance with acute or chronic diseases. It is shown that the feature of the phase representation is that it demonstrates the dynamic properties of the system in a compact form. It can be used to evaluate the velocity characteristics of the process, its stationarity.
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