希氏束近端阻滞(BPH)预后良好,一般不需要起搏器治疗,而希氏束内阻滞(IHBB)及希氏求远端阻滞(BDH)预后不良,可有突然晕厥甚至猝死的危险,需要安置永久型人工心脏起搏器。特别是其中的IHBB在心电图(ECG)上QRS波群不增宽,与BPH相同,而预后及治疗与BPH有本质的区别。因此,房室传导阻滞(AVB)的定位诊断, His bundle proximal block (BPH) has a good prognosis and generally does not require pacemaker treatment, and his prognosis is poor with IHBB and DES, with sudden syncope or even sudden syncope The risk of sudden death requires the placement of a permanent artificial pacemaker. In particular, the IHBB QRS complex on the ECG is not broadened, and is the same as BPH, and prognosis and treatment are essentially different from BPH. Therefore, atrioventricular block (AVB) localization diagnosis,