Patent ID: 7567837
Filing Date: 2009-07-28
Classification: A61B,A61N

Abstract:
1. A method for determining a treatment of a victim of possible cardiac arrest, while chest compressions are applied to the victim and ECG (electrocardiogram) signals of the victim are monitored to determine whether or not the heart generates QRS rhythms and whether or not the heart signals indicate ventricular fibrillation, comprising: continuing to apply chest compressions to the victim while generating corrupted ECG signals that are corrupted by chest compression artifacts; analyzing the corrupted ECG signals that are corrupted by chest compression artifacts to determine whether or not a defibrillating shock should be applied to the victim; said step of analyzing the corrupted ECG signals includes producing first calculations representing an autocorrelation of each of a plurality of spike regions of a transform of the ECG signal and producing second calculations representing a crosscorrelation of said plurality of spike regions, calculating an integral of a magnitude of differences between said crosscorrelation and said autocorrelations and determining from said calculations whether or not the heart generates QRS rhythms or whether or not the signals indicate ventricular fibrillation.