| 摘要 |
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 X={x÷x} and X={x÷x}in the search area, calculating arithmetical mean amplitudes Mand Mof the readouts from the numbers Xand X, calculating an absolute difference of mean ECS amplitudes D=|M-M|, and unless D gets more than the ECS limit, calculating M, Mand D is repeated for the numbers Xand Xdisplaced one element to the right until reaching the right limit of the search area, isolating the readout J=xin each j-th deflection for which D falls below the ECS limit. Thereafter the latest Jvalue 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 |
