Patent ID: 7221976
Filing Date: 2007-05-22
Classification: A61B

Abstract:
1. A device for the analysis of the cycle to cycle alternans and/or the variability of the ventricular repolarisation wave in an ECG signal which includes a series of cardiac beats each beat having a ventricular repolarization wave for assessing cardiac instability, comprising: means for extracting from an ECG signal, for each cardiac beat, a temporal segment of T samples of the ventricular repolarisation wave, considered as from a moment t following a predetermined temporal origin; means for memorizing said extracted T samples for B consecutive beats considered starting from the b beat of ECG signal, so as to select and memorize a two-dimensional aggregate of T×B contiguous samples of signal in time-beats space; means for calculating a local variance factor of the ventricular repolarisation wave, representative of a measurement of the variance of the signal level of the samples inside said aggregate; and weighting means operable: