METHOD FOR ANALOGUE-DIGITAL PARAMETER MEASUREMENT AT AUTOMATIC FRAGMENTATION OF ELECTROCARDIOSIGNALS Russian patent published in 2017 - IPC A61B5/452 

FIELD: medicine.

SUBSTANCE: method for analogue-digital measurement of parameters for automatic fragmentation of electrocardiograms (ECS) can also be used in electrophysiology when measuring parameters and fragments of electrophysiological indices and in measuring devices for measuring parameters and fragments of both random and deterministic signals under interference. ECS recording, its preliminary analogue filtering and analogue-to-digital conversion are performed. An a priori established sliding symmetric transformation (SST) of the obtained discrete samples is performed within the local region with respect to its central digital reference (DR). A fragment of the signal containing an extremum is isolated, and the extremum is determined within the fragment. Analogue-to-digital conversion is performed at an increased frequency of time sampling. In order to extract a signal fragment containing the extremum, the first and second sliding asymmetric separate transformation (SAST) for the DR of the same local area are additionally performed during SST. The obtained values of the first and second SASTs are brought to one positive sign and compared with the a priori signatures of the a priori established first and second thresholds, respectively. The nonlinear correlation (NC) of the SAST values is determined only when the SAST values of the corresponding thresholds are simultaneously exceeded at each clock by a pairwise multiplication. For other cases of comparison results, its values are equal to zero. The NC value is compared with the third a priori established threshold and an ECS fragment containing only its first extremum is identified by exceeding the NC of the third a priori established threshold.

EFFECT: increased accuracy and reliability of measurements in real-time parameters with automatic fragmentation of electrocardiosignals and reliability of diagnostics by cardiological indicators under the influence of interference and reduced complexity of method implementation.

2 cl, 12 dwg