METHOD FOR ISOLATION OF BEGINNING OF VENTRICULAR REPOLARISATION Russian patent published in 2014 - IPC A61B5/402 

FIELD: medicine.

SUBSTANCE: continuous electric cardiac signal (ECS) is filtered and presented in the form of discrete readouts. Then it is smoothed by amplitude averaging of adjacent readouts of the electric cardiac signal. That is followed by isolating R-R interval and a cardiac cycle, limiting a search area of the beginning of the ventricular repolarisation to the left and right in relation to R wave, specifying two numbers of the ECS readouts X₁={x_a÷x_b} and X₂={x_c÷x_d}in the search area, calculating arithmetical mean amplitudes M₁ and M₂ of the readouts from the numbers X₁ and X₂, calculating an absolute difference of mean ECS amplitudes D=|M₁-M₂|, and unless D gets more than the ECS limit, calculating M₁, M₂ and D is repeated for the numbers X₁ and X₂ displaced one element to the right until reaching the right limit of the search area, isolating the readout J_j,i=x_a in each j-th deflection for which D falls below the ECS limit. Thereafter the latest J_j,i value is determined; the determined value represents the beginning of ventricular repolarisation in the i-th cardiocycle.

EFFECT: method provides higher reliability of isolating R-wave and stating the beginning of ventricular repolarisation.

13 dwg