Methods and apparatus for discriminating polymorphic from...

A - Human Necessities – 61 – N

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A61N 1/39 (2006.01) A61B 5/046 (2006.01) A61B 5/0464 (2006.01) A61B 5/00 (2006.01)

Patent

CA 2508702

Methods and apparatus are provided for discriminating high rate polymorphic QRS complexes from high rate monomorphic QRS complexes to increase the specificity of detection of polymorphic VT and VF employing wavelet transform signal processing of the QRS complexes are disclosed. Wavelet transforms are applied to the sampled amplitude values of a sequence of QRS complexes to develop wavelet transform coefficient (WTC) data sets. At least selected ones of the WTC data sets are processed and comparisons are made to determine a wavelet match score. A determination is made as a function of the wavelet match scores of the series of successive QRS complexes that characterizes the most recent QRS complex as more or less likely to signify polymorphic VT or VF.

L'invention concerne des procédés et des appareils permettant de discriminer des complexes polymorphes de taux élevé QRS des complexes monomorphes de taux élevé QRS afin d'augmenter la spécificité de la détection de VT et VF polymorphe utilisant le traitement du signal de transformation par ondelettes des complexes QRS. Des transformations d'ondelettes sont aux valeurs prélevées d'amplitude d'une séquence ordre de complexes QRS afin pour développer des ensembles de coefficients de transformation par ondelettes (WTC). Au moins certains des ensembles de données WTC choisis sont traités et des comparaisons sont réalisées afin de déterminer un score de correspondance d'ondelette. Une détermination est faite en fonction des scores de correspondance d'ondelette des séries de complexes successifs de QRS caractérisant le complexe de QRS le plus récent indiquant probablement plus ou moins un VT ou VF polymorphe.

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