【摘要】 探讨数字化的心电图(ECG)绝对心室颤动电压(AVFV)与心室电除颤结果之间的相关性。在11只成龄犬中按矢状方向(Y轴)、横向(X轴)和纵向(Z轴)连接电极建立正交ECG并安置经静脉双导管心脏电除颤系统;诱发室颤持续10 s,按选定的除颤成功率为50%的电量进行电除颤;使用希尔伯特(H ilbert)变换测定ECG包络电压。结果显示:在236个心室电除颤成功的试验(DF 1)和249个电除颤失败的试验(DF 2)两组中的AVFV包络电压无明显一致性的差别;DF 1组的移动平均电压并不大于DF 2组,其Z轴方向上电压反而小于DF 2组。研究表明:心室颤动期间ECG的AVFV与心室电除颤结果之间无很强的相关性。更多还原

【Abstract】 The objective of this study is to evaluate the correlation between the absolute ventricular fibrillation voltage(AVFV) computed from electrocardiogram(ECG) and the outcome of defibrillation shocks.Orthogonal ECG(sagittal,x;transverse,y;and longitudinal,z) was recorded from 11 dogs during 10 seconds of electrically induced ventricular fibrillation followed by defibrillation shocks with 50% probability of success.The transvenous two-leads defibrillation system was used to deliver defibrillation shocks.The envelope voltage was estimated by using the Hilbert transform.The comparison of the envelope voltages between 236 successful trials and 249 unsuccessful trials did not show any consistent and statistically significant differences.In contrast with the previously reported correlation,the moving average of AVFV was not higher in the successful trials.In the Z direction,the successful trials had lower voltage than did the unsuccessful trials(P<0.05).These results suggest that the absolute voltage of ECG during ventricular fibrillation is not robustly correlated with the outcome of defibrillation shocks.更多还原