FIELD: medicine.
SUBSTANCE: invention refers to medicine, particularly to electrocardiography, and can be used in controlling the alternation of amplitude-time characteristic of electrocardiosignal T-wave between cardiac cycles and analysis thereof to detect irregularities. The method is characterised by the following procedure. Electrocardiosignal (ECS) is filtered; isoline drift is corrected and digitised in time; a reference point is specified in each cardiocycle; in a moving time slot the signal power P and the spectral ratios in Walsh function basis W0, W1, and W3 are formed. When the time slot concurs with ECS T-wave, the spectral ratios W0, W1, and W3 that determine parametres of T-wave shape of current cardiocycle are stored; for each two following cardiocycles the differences of spectral ratios ΔW0, ΔW1, and ΔW3 of stored current and previous values W0, W1, and W3 are formed to compare the differences ΔW0, ΔW1, and ΔW3 with the threshold levels, and if any difference excesses the relevant threshold level, T-wave alternation is registered. A device comprises an elecrocardiosignal shaping unit, an elecrocardiosignal preprocessing unit, a digitising unit, a reference point separator, an ECS discrete report storage block, a power evaluator of said set of stored reports, current and previous power storage blocks, a current and previous power comparator, a shaping unit in Walsh function basis of spectral ratios W0, W1, and W3, a storage block of spectral ratios of current cardiocycle, a storage block of spectral ratios of previous cardiocycle, a forming unit of differences ΔW0, ΔW1, ΔW3 of spectral ratios of two following similar cardiocycles, a threshold levels memory block and a comparator of differences ΔW0, ΔW1, ΔW3 to the threshold levels output of which being that of the device.
EFFECT: inventions provide higher reliability of alternation detection regardless the law of variation of T-wave shape parameters between cardiocycles.
2 cl, 8 dwg
