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采用大致相当于额面的6个前胸双极导联,通过MAC—Ⅰ型高分辨度心电图仪记录70例患者的希氏束电图,成功率为90％(63/70)。所得结果与自身心导管法对比,H波与HV间期十分吻合;单个导联以Ⅰ导联最佳,成功率45％;频率以100Hz描出的H波最清楚;PV平段过短,H波被A波末端高频电位掩盖及基础噪声过高是7例描记失败的原因。记录时要求房室传导时间固定和心律规则是本法之不足。
Six patients with bipolar leads, roughly equivalent to the frontal plane, were recorded on a MAC-I high-resolution electrocardiograph in 70 patients with a success rate of 90% (63/70). The results were in good agreement with those of the endocardial catheterization method. The H wave coincided well with the HV interval. The best lead was obtained with a single lead with 45% success rate. The H wave with the frequency of 100 Hz was the most clear. The wave was obscured by the high frequency potential of the A-wave end and the basic noise was too high, which led to the failure of the 7 cases. Record requirements of atrioventricular conduction time and heart rate rules is inadequate.