摘要
报道1例束室纤维合并双房室旁道的电生理表现。患者有心动过速史15年,心电图示右侧游离壁显性旁道,分别于三尖瓣环8点半和5点半处消融阻断旁道,原心电图发生了改变,但存在Delta波。上述两条旁道消融前,PR间期均为0.06s,心房递增刺激Delta波增大,房室传导无文氏现象。两条房室旁道消融后,PR间期为0.10s、AH间期100ms、HV间期20ms。心房递增刺激时AH间期逐渐延长且出现文氏型房室阻滞,HV间期不变、预激程度不变,提示为Mahaim纤维(束室支)。心室刺激时逆传A波在His束电图最早,提示His束逆传。三尖瓣环上未能标测到A、V波融合。心房、心室刺激未能诱发心动过速。
It is reported that one case of patient with bundle ventricular fiber coexisting with dual accessory pathways and its electrophysiologic characteristics.The patient was a 40 year old female with history of supraventricular tachycardia for 15 years.The Electrocardiogram showed right free wall accessory pathway.Ablation at half past 8 oclock and at half past 5 oclock along the tricuspid ring resulted in further changes in QRS morphology but still with the present of Delta wave.Before the ablation of the two accessory pathways,the PR interval was 0.06 s and an increased Delta wave was noted during decremental atrial pacing and no Wenchbach conduction was found.At the successful ablation site,the fusion of AV wave was found to be earlier than the onset of Delta wave.After the ablation of two accessory pathways,the PR interval was 0.10 s,AH interval was 100 ms,HV interval was 20 ms.During the atrial incremental stimulation,the AH interval prolonged gradually with the Wenchbach conduction block and no changes in HV interval and Delta wave.This finding suggests the present of Mahaim fiber.The earliest retrograde atrial activity was recorded at the His bundle area.No AV fusion was found along the tricuspid ring.No tachycardia was induced with the atrial and ventricular stimulation.
出处
《中国心脏起搏与心电生理杂志》
1997年第2期90-92,共3页
Chinese Journal of Cardiac Pacing and Electrophysiology
关键词
MAHAIM纤维
房室旁道
心电图
预激综合征
Mahaim fiber Accessory pathway,atrioventricular Electrophysiology Catheter ablation,radiofrequency current