Development of Detection Algorithm of Fatal Arrhythmia for a New Implantable Cardioverter Defibrillator

This study discusses the validity of new methods of detecting fatal arrhythmia used for ICDs. The method utilizes the steady state gain of the system from the ECG signal to the ventricular volume signal. After analyzing the data measured in a dog, it has been shown that the system can be approximated by a second order resonant system. Moreover, it has been indicated that the batch-type least squares method with the short data window shifting every time the R-wave occurs is better rather than a few versions of recursive algorithms for identifying time-varying parameters