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DEVICE AND METHOD FOR DETECTING ALTERNATION OF VENTRICULAR REPOLARISATION USING WINDOWING
WO10084211
Device and method for detecting alternation of cardiac ventricular repolarisation. The method involves extracting ventricular repolarisation information by windowing in continuous time blocks of beats of variable length of a bioelectric heart signal, ECG, where the windowing is effected with a window defined by a periodic adjustable duty-cycle signal.
The ECG is processed in the time domain. Using a reduced number of beats in the analysis: The variability effect of heart rate decreases. The resolution of the analysis improves. The computational cost is reduced, making it valid for implementation into any existing device, including portable or implantable devices. It is based on spectral analysis, using the ECG as an original signal sin the analysis. A small number of heart beats is used in the analysis, from 8 to 32. It is robust against noise, being valid for the analysis of any type of electrical signal of the heart from any existing device, like Holter monitoring long term, signals from exercise testing, cardiac monitoring devices or intracavitary signals from electrophysiological studies or implantable devices.