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希氏束近端阻滞(Block Proximal to H,BPH)与希氏束内阻滞(Intra-His Bundle Block,IHBB)的心电图特点相似,QRS波群均不增宽,但其预后及治疗明显不同。因而二者的鉴别在临床上很重要。但目前除了心内希氏束电图这一创伤性的检查外,尚无可靠的非创伤性定位诊断方法。1978年Berman等曾提出,在QRS波群不增宽的
Block Proximal to H (BPH) and intra-His Bundle Block (IHBB) ECG characteristics similar to QRS wave group did not broaden, but the prognosis and treatment was significantly different. Therefore, the identification of the two is clinically important. However, at present, there is no reliable method for the non-invasive localization diagnosis except for the intracardial His bundle electrogram. In 1978 Berman et al. Proposed that the QRS complex is not broadened