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对正常国人122例信号平均心房图，从时域及频域两方面进行分析研究，文献检索尚未检索出类似报道。本文对正常信号平均心房图（SAAECG）的基本特征，包括X、Y及Z三导联间、不同性别及年龄组间；综合P波滤波前后时限差；滤波前P波振幅以及0～500Hz各频段频谱面积百分比等的特征及差异性进行了观测，计算及分析．供用于临床研究心房电活动及诊断和预测某些疾病或病症之参考，
122 normal subjects atrial signal average atrial map, from the time domain and frequency domain analysis and research, literature search has not retrieved a similar report. In this paper, the basic characteristics of the normal signal atrial atrial (SAAECG), including X, Y and Z three lead, gender and age groups; integrated P wave filter before and after the time difference; P wave amplitude before filtering and 0 ~ 500Hz Band spectrum area percentage characteristics and differences were observed, calculated and analyzed. For clinical study of atrial electrical activity and diagnosis and prediction of certain diseases or conditions of reference,