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目的 :探讨小儿室上性心动过速 (SVT)的类型及其电生理特征 ,以及食管起搏对小儿SVT的干预作用。方法 :对 4 7例 8个月～ 15岁有SVT发作史的患儿进行了食管心电生理研究。结果 :4 7例SVT经食管心房调搏 (TEAP)确定分型 4 2例 (89.4 % ) ,其中旁路折返 2 8例 (6 6 .7% ) ,房室结内折返 10例 (2 3.8% ) ,心房内折返l例 ,窦房结折返l例 ,心房自律性增高 2例 ;不能定型 5例 (10 .6 % )。结论 :小儿SVT近 95 %为折返机制所致 ,以旁路折返最常见 ,其次为房室结内折返 ,与成人报道不同 ,可能与小儿传导系统发育规律以及旁路电生理特性发生演变有关
Objective: To investigate the types and electrophysiological characteristics of supraventricular tachycardia (SVT) and the intervention effect of esophageal pacing on SVT in children. Methods: Esophageal electrophysiological studies were performed in 47 children aged 8 months to 15 years who had a history of SVT. Results: Forty-four cases (89.4%) were confirmed by TEAP in 48 cases of SVT, of which 28 (66.7%) were bypass reentry and 10 (2.8 %), 1 case of atrial reentry, 1 case of sinoatrial node reentry, 2 cases of atrial autoregulation; 5 cases can not be stereotyped (10.6%). CONCLUSIONS: Nearly 95% of SVT in children is caused by the mechanism of reentrant, the most common is bypassed reentry, followed by the reentry of atrioventricular nodal, which may be related to the development of pediatric conduction system and the evolvement of the electrophysiological characteristics of the bypass