显性房室旁路可以根据体表心电图作出初步定位诊断 [1 - 3] 。但在临床实践中常常遇到一些根据传统心电图定位诊断方法判断错误的病例。[4] 本文将我们收集到的一组 (9例 )特殊类型的显性左后间隔旁路体表心电图作一报告。所有病例均经射频消融治疗取得成功 ,并证实为左后间隔 Dominant atrioventricular bypass can be based on the surface ECG to make a preliminary diagnosis of positioning [1-3]. However, in clinical practice, we often encounter some cases based on the traditional method of ECG diagnosis to determine the error. [4] In this paper, we report a group of 9 patients with a special type of dominant left posterior segmental bypass body surface electrocardiogram. All cases were successful in radiofrequency ablation and confirmed as left posterior septum