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目的应用心室内起搏法评价心电图a VR导联四步法诊断宽QRS波心动过速的价值。方法 32例164份心室不同部位起搏12导联心电图,两名心电工作者双盲法应用a VR四步法进行判读,验证其有效性;手工法测量a VR导联宽QRS波起始40 ms除极时间与终未40 ms除极时间比值(Vi/Vt)并比较不同部位心室起搏Vi/Vt比值差异。结果 164份心室起搏心电图中160份被判读为室性心动过速(简称室速),诊断准确率97.6%,146份(89.0%)Vi/Vt<1;右室高位间隔(0.30±0.13)、右室中位间隔组(0.37±0.13)组Vi/Vt比值较小(P<0.05);左室侧壁组(0.79±0.69)、左室基底部组(0.70±0.47)、右室流入道组(0.65±0.31)、右室低位间隔组(0.57±0.29)a VR导联Vi/Vt比值较高(P<0.05)。结论心室内起搏研究中,心电图a VR四步法诊断室速准确性较高。a VR导联Vi/Vt<1是鉴别宽QRS波心动过速为室速的简单、快捷、有效的定量指标。
Objective To evaluate the value of four-step ECG-atrial-PV pacemaker in the diagnosis of wide QRS tachycardia by intraventricular pacing. Methods 32 cases of ventricular pacing in different ventricular 12-lead electrocardiogram were performed in 32 cases. Two electrocardiogram workers were double-blind with a four-step a VR method to verify their validity. ms depolarization time and the final 40 ms depolarization time ratio (Vi / Vt) and compared ventricular pacing Vi / Vt ratio differences in different parts. Results 164 of 164 ventricular pacing ECG were diagnosed as ventricular tachycardia, with a diagnostic accuracy of 97.6%, 146 (89.0%) Vi / Vt <1 and high right ventricular septum (0.30 ± 0.13 (0.79 ± 0.69), left ventricular base group (0.70 ± 0.47), right ventricular (left ventricular base group) The ratio of Vi / Vt in the lead group (0.65 ± 0.31) and the low right ventricular septum group (0.57 ± 0.29) a VR was higher (P <0.05). Conclusions In the study of intraventricular pacing, the accuracy of electrocardiogram a VR four-step method in diagnosing VT was high. a VR lead Vi / Vt <1 is a simple, quick and effective quantitative indicator to identify wide QRS tachycardia as ventricular tachycardia.