阵发性室上性心动过速(以下简称PSVT)为小儿常见心律失常和急诊。近年来采用入侵性心脏电生理检查和24小时心电监护,对阐明PSVT的发生机理,评价抗心律失常药物疗效和确定治疗方案具有重要意义。然而根据儿科特点及我国国情,上述检查尚未广泛开展。由于体表心电图结合临床表现对多数病例能作出分型诊断,并非每例 Paroxysmal supraventricular tachycardia (hereinafter referred to as PSVT) for children with common arrhythmia and emergency. In recent years, the use of invasive cardiac electrophysiological examination and 24-hour ECG monitoring, to clarify the pathogenesis of PSVT, evaluate the efficacy of anti-arrhythmic drugs and determine the treatment program is of great significance. However, according to the pediatric characteristics and China’s national conditions, the above inspection has not yet been carried out widely. As the surface ECG combined with clinical manifestations of most cases can make a sub-type diagnosis, not every case