持续性交界区反复性心动过速的电生理特征及射频消融

Electrophysiological Characteristics and Catheter Radiofrequency Ablation of the Permanent Form of Junctional Reciprocating Tachycardia

报告６例持续性交界区反复性心动过速的电生理特征及射频消融结果。平均病史２２年，平均心动过速周长３８８ｍｓ，１例ＲＰ＞ＰＲ，５例ＲＰ＜ＰＲ。心动过速均为房室结前传，具有递减传导的旁路逆传。３例旁路在右后间隔，１例旁路在左游离壁，１例旁路在左后间隔，１例旁路位于右游离壁。射频消融均成功阻断旁路，无任何并发症，平均随访６个月，未用任何药物无一例再发心动过速。本文分析了持续性交界区反复性心动过速的电生理特征，并提出了诊断标准。

Abstract The electrophysiological findings and the results of catheter radiofrequency ablation of 6 patients with the permanent form of junctional reciprocating tachycardia(PJRT)were presented in the study. The mean course of disease was 22 years. The mean cycle length of the tachycardia was 388ms. There was a distinct retrograde P wave with RP longer than PR in only one patient on electrocatdiogram.decremental conduction properties was the retrograde limb.Of the 6 patients ,AP was at right posteroseptum in 3 cases.In others, APs were at left free wall,left posteroseptum and right free wall respectively.The ablation of AP was successful and there was no complication.During the mean 6 months of follow-up, no tachycardia recurred.PJRT is a rare type of arrhythmia. It occurrs in children at first and may last to adults.The tachycardia is often incessant and the drugs ineffective.So far,the electrophysiological characteristics and radiofrequency ablation of PJRT has seldom been reported in China.