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左心房肥大主要是左心房内径的增大,长期来心电图对左心房肥大的诊断标准为:①P波时间增宽达0.12秒以上;②P波有切迹,切迹两峰之间的时间(简称P波切迹时间)在0.04秒以上;③V_1导联P波终末电势的绝对值(PTF-V_1,简称为PTF)在0.04毫米秒以上。本文将心电图P波的改变与超声心动图测得的左心房内径作对比分析,探讨P电轴,P波时间、P波切迹时间及PTF与左心房内径的关系,在左心房肥大诊断中的价值。一、资料分组及方法
Left atrial hypertrophy is mainly the increase in the diameter of the left atrium, long-term ECG diagnostic criteria for left atrial hypertrophy: ① P-wave widening of more than 0.12 seconds; ② P wave notch, notch between two peaks (referred to as P Wave notch time) is above 0.04 second. ③The absolute value of the terminal potential of P wave of V_1 lead (PTF-V_1, referred to as PTF) is more than 0.04mm second. This paper will ECG P wave changes and echocardiography measured left atrial diameter for comparative analysis of P axis, P wave time, P wave notch time and PTF and left atrial diameter relationship in the diagnosis of left atrial hypertrophy value. First, the data grouping and methods