METHOD AND DEVICE FOR ELIMINATING ELECTROCARDIOGRAM SIGNAL ISOLINE DRIFT,申请号RU20030128606-传众专利搜索

METHOD AND DEVICE FOR ELIMINATING ELECTROCARDIOGRAM SIGNAL ISOLINE DRIFT

申请公布号：RU2251968(C1)

申请号：RU20030128606

申请日期：2003.09.23

申请公布日期：2005.05.20

发明人：MIKHEEV A.A.;NECHAEV G.I.

分类号：A61B5/00;A61B5/0402

主分类号：A61B5/00

摘要：FIELD: medicine; medical engineering. ^ SUBSTANCE: method involves selecting reference point in every cardiac cycle on TP-segment. Values of neighboring N=2n+1 reference points also belonging to TP-segment are recorded, n=1,2,à, beginning from the first reference point. Other reference points are set to zero. The central reference point value is left without changes in a group of 2n+1 member. Reference point values of each of n pairs of reference points symmetrically arranged relative to the central reference point are scaled relative to condition Uj=U0Kj, where U0 is the central reference point amplitude, Uj is amplitude of j-th reference point pair, j=1,2,à,n is the number of each reference point pair relative to the central reference point, Kj is the scaling coefficients determined from received signal suppression condition of the first n spectral zones in spectrum. The so formed electrocardiogram signal reference point groups sequence is let pass through lower frequency filter with isoline drift signal being obtained being produced on output. The signal is amplified and subtracted from the initial electrocardiogram signal that is preliminarily delayed for lower frequency filter delay time. Device has the first lower frequency filter, discretization unit and unit for selecting anchor reference points connected in series, as well as subtraction unit, unit for saving N reference points, scaling unit, the second lower frequency filter, amplifier and delay unit. Output of the unit for selecting anchor reference points is connected to the first input of memory unit the second input of which is connected to discretization unit output. Each of N memory unit outputs is connected to one of N inputs of scaling units. Scaling unit output is connected to the second lower frequency filter input which output is connected to amplifier input. Amplifier output is connected to the first input of subtraction unit, the second output of subtraction unit is connected to delay unit output. Its input is connected to output of the first lower frequency filter. Subtraction unit output is the device output. ^ EFFECT: reliable removal of isoline drift. ^ 2 cl, 8 dwg