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本文分析了１２０例头胸导联心电图（ＨＣＥＯＧ）及常规导联心电图（ＲＬＥＣＧ）的５４００种Ｐ波形态、振幅、时限。结合其中３０例心房肥大病人的Ｘ线心脏片及超声（彩色多普勒、Ｂ型、Ｍ型）检查，以临床心电图诊断心室肥大，室内传导阻滞的方法为参考，拟订出心房肥大（ＡＨ），房内传导阻滞（ＡＢ）的诊断标准。结果表面：５０例健康人两种导联心电图Ｐ波振幅、时限均值均在正常范围。但ＨＣＥＣＧ的Ｐ波振幅明显高于ＲＬＥＣＧ，且波形清晰易测；４０例异常心电图比较，ＲＬＥＣＧＰ波变化多反映在Ⅱ、Ⅲ，ａＶＦ三个导联上，可视范围小，而对照组的ＨＣＥＣＧＰ波变化多反映在与ＲＬＥＣＧ对应的ＨＬ３，ＨＯ，ＨＲ３，ＨＶ２－ＨＶ９，ＨＶ１－ＨＶ９Ｒ１９个导联上，可视范围广；３０例心房肥大病人分析，ＨＣＥＣＧ诊断阳性率高于ＲＬＥＣＧ。
In this paper, we analyzed 5400 kinds of P-wave morphology, amplitude and time-limit of 120 cases of head-chest lead electrocardiogram (HCEOG) and routine lead electrocardiogram (RLECG). Combined with X-ray and ultrasonography (color Doppler, type B and type M) examination of 30 patients with atrial hypertrophy, with reference to the methods of clinical diagnosis of ventricular hypertrophy and conduction block, atrial hypertrophy (AH ), Room conduction block (AB) diagnostic criteria. Results Surface: Electrocardiogram P-wave amplitudes of two kinds of lead in 50 healthy people, mean time were in the normal range. However, the amplitude of P wave of HCECG was significantly higher than that of RLECG, and the waveform was clear and easy to measure. Compared with the abnormal electrocardiogram of 40 cases, the change of RLECGP wave was mostly reflected in the three leads of Ⅱ, Ⅲ and aVF, and the visual range was small. The changes of wave were mostly reflected in 19 leads of HL3, HO, HR3, HV2-HV9 and HV1-HV9R corresponding to RLECG, and the visual range was wide. The positive rate of HCECG diagnosis in 30 patients with atrial hypertrophy was higher than that of RLECG.