FIELD: medicine.
SUBSTANCE: invention relates to means for the estimation of energy efficiency of a cardiovascular system. The method of automatic processing of blood pressure signals contains stages at which: a detected pressure signal P(t) for one or more heart contractions is discretised, with each heart contraction starting at an initial moment, coinciding with the moment of the diastolic pressure, and finishing at the last moment, coinciding with the moment of the following diastolic pressure, and containing a dicrotic point, the morphology of a discretised pressure signal P(t) for each heart contraction is analysed and separated, the moment and value of pressure in one or more characteristic points of the signal P(t) are determined. For each heart contraction a value of energy efficiency is determined by the determination of the impedance Zd-D(t) of a direct dynamic wave of pressure for each of one or more characteristic points, except the point of an initial diastolic pressure, and the impedance ZD of a direct pressure wave is determined by the addition with alternating signs of values of the impedances Zd-D(t) of the direct dynamic pressure wave, ordered in accordance with the direct time order, starting with the initial moment of the analysed heart contraction, to a dicrotic moment, the dynamic reflected impedance Zd_R(t) is determined for each of one or more characteristic points and the value of impedance ZR of reflected pressure waves is determined, energy efficiency is determined as a ratio between the impedance ZD of the direct pressure wave and the impedance ZR of the reflected waves RES=ZD/ZR. The method is realised by an automatic device for processing the blood pressure signal with the application of a storage medium, which contains stored software.
EFFECT: application of the invention makes it possible to increase the reliability of energy efficiency estimation.
14 cl, 6 dwg
