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目的探讨肢体导联QRS波形态改变对左后分支型室速成功射频消融的判断价值。方法对64例经心内电生理检查确诊的左后分支型室速患者进行射频消融,分析射频消融前后窦性节律时肢导联心电图的变化,并对其随访。结果成功射频消融患者术后下壁导联出现Q波或Q波较前加深,同时伴或不伴有Ⅰ和aVL导联Q波消失或S波较前加深。结论左后分支型室速成功射频消融可引起肢导联QRS波形态改变,尤其是下壁导联。联合的下壁导联和/或(Ⅰ和aVL)导联形态改变可作为左后分支型室速射频消融的有效终点。
Objective To investigate the value of limb lead QRS waveform morphological changes on the success rate of left ventricular branch-space radiofrequency ablation. Methods 64 cases of left ventricular tachycardia diagnosed by electrophysiological examination underwent radiofrequency catheter ablation. Changes of limb lead electrocardiogram before and after radiofrequency ablation were analyzed and followed up. Results Q-wave or Q-wave was found to be deepened in the lead of inferior wall after successful radiofrequency catheter ablation. Q-wave disappeared or S-wave deepened in Ⅰ and aVL leads with or without radiotherapy. Conclusions The successful radiofrequency ablation of left posterior branch ventricular tachyarrhythmias leads to the change of the morphology of the limb lead QRS wave, especially the inferior leads. Combined morphological changes of the inferior leads and / or (I and aVL) lead can be effective end points for left-lateral ventricular tachycardia radiofrequency ablation.