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。 The normal ECG (ECG) signal, ventricular tachycardia (VT) and ventricular fibrillation (VF) were studied based on Hurst index. The Hurst index values ​​of normal ECG, VT and VF signals were calculated respectively. The Hurst index values ​​of these three signals were significantly different, but all of them were greater than 0.5, suggesting that there was a long-term correlation characteristic. The correlation between normal ECG signals Strong, VT signal second, VF signal is the weakest. Therefore, Hurst index can be used as a criterion to identify normal ECG, VT and VF signals.