【摘要】 目的　评价射频消融阵发性室上性心动过速的延迟作用及其临床意义。方法　 2例顽固性阵发性室上性心动过速患者住院行射频消融术。例 1:女性 ,15岁 ,预激综合征 ,体表心电图及心内电生理检查示左侧旁路。例 2 :男性 ,体表心电图正常 ,心内电生理检查证实为左侧房室旁路。结果　在消融放电时 ,2例患者的房室旁路均可被阻断 ,但都因停止放电后旁路多次复发而致术中消融失败。例 1术后一天预激消失 ,例 2术后第七天重复心内电生理检查无旁路传导。平均随访 7个月无心动过速复发。结论　射频能量对心脏的作用 ,不仅发生在释放能量的当时 ,而且可延迟到术后一段时间更多还原

【Abstract】 Objective To investigate the delayed response to radiofrequency ablation in patients with paroxysmal supervertricular tachycardia and it′s clinical implication Methods Two cases with refractory superventricular tachycardia were presented for radiofrequency ablation Case 1 is a 15 year old female, her resting electrocardiogram (ECG) showing pre excitation with left sided accessory pathway Case 2, a 45 male patient, had a normal resting ECG with concealed left sided accessory pathway demonstrated during electrophysiological study Results The atrioventricular accessory pathways of the two cases were interrupted temparely during release of ablation energy However, unsuccessful ablation were seen during procedure due to refractory recurrence of the pathways when ceasing ablation The pre excitation was gone with normal resting ECG for the first case just one day post procedure Repeated electrophysiological study was performed for another patient 7 days post procedure and the accessory pathway was not demonstrated There were no recurrent for the two patients during follow up of 7 months Conclusion Delayed response to radiofrequency ablation of accessory pathway can occur in some patients with unsuccessful ablation during procedure更多还原