右心室内膜起搏心电图呈不典型左束支阻滞甚少见,现报导我科所见一例。病员,男,六十四岁,会计,住院号35480。因反复昏厥三年多伴心累,心慌一年加重一月,于一九八二年十一月二十六日收入住院。近一年来昏厥频繁发生,发作前感头昏,阵阵心慌,心跳,心前区隐痛,发作时短暂意识丧失。多次就诊于川医及我院门诊部。曾经三次作心电图为窦性心动过缓(48—58次/分),偶发房性早搏,可疑房内阻滞。既往无高血压及高血脂历史,有烟酒嗜好四十余年,家族中无特殊传染病及遗传病史。入院查体:体温36℃,脉搏60,呼吸24,血压120/80。一般情况尚好,神清合作,体型 Right ventricular endocardial pacing was atypical left bundle branch block is very rare, we now report a case of our department. Patient, male, 64, accounting, hospital number 35480. Due to repeated fainting more than three years with heart tired, aggravating one year in January, on January 26, 1982 income hospitalization. Fainting has occurred frequently in the past year, before the onset of dizziness, bursts of panic, heartbeat, precordial pain, episodes of temporary loss of consciousness. Repeated visits to Sichuan Medical Hospital and our clinic. Electrocardiogram has been three times for sinus bradycardia (48-58 beats / min), occasional atrial premature beats, suspicious room block. No previous history of hypertension and hyperlipidemia, alcoholic drinks and tobacco more than 40 years, no special family history of infectious diseases and genetic history. Admission examination: body temperature 36 ℃, pulse 60, breathing 24, blood pressure 120/80. The general situation is good, clear cooperation, body size