基于Hurst指数的室性心动过速与室颤的分析

Hurst Index Based Analysis of Ventricular Tachycardia and Ventricular Fibrillation

基于Hurst指数对正常心电(ECG)信号、室性心动过速(VT)与室颤(VF)进行研究分析。分别计算出正常ECG、VT和VF信号的Hurst指数值,发现这三种信号的Hurst指数值存在明显的差异,但都大于0.5,提示都有长期相关的特性,其中正常ECG信号的相关性最强,VT信号次之,VF信号最弱。因此,Hurst指数可以作为识别正常ECG、VT和VF信号的一种判据。

In our laboratory,the normal ECG signal,the ECG signals of ventricular tachycardia（VT） and of ventricular fibrillation（VF） are studied with the use of Hurst index value.The Hurst index values of the normal ECG signal,VT,VF are calculated separately.There exist obvious differences among the Hurst values of the three kinds of signals,but they are all higher than 0.5 which is a value indicating the long-term relevant character.The long-term relevant character of the normal ECG signal is the best,and the character of VT is better than that of VF.Therefore,the Hurst Index can be used as an identification criterion for distinguishing normal ECG,VT and VF.