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近年来许多人对单纯依靠ⅡⅢAVF等肢体导联P波改变诊断右房异常渐感不足,而对于水平面电轴PV_1—V_8的形态尤其是正负向PV_1终末向量及PV_2起始向最的变化逐渐寄予重视。双相P波起始为直立部分的振幅和时间的乘积即高度×宽度(附图)称为PV_1起始指数(简称IPIV_1),代表水平面右心房除
In recent years, many people simply rely on Ⅱ Ⅲ AVF and other limb lead P wave changes in the diagnosis of right atrial anomaly gradually less than adequate for the horizontal axis PV_1-V_8 morphology, especially positive and negative PV_1 terminal vector and PV_2 start to the most changes Gradually placed emphasis. Biphasic P wave initial for the vertical part of the product of amplitude and time height × width (the figure) called the PV_1 initial index (referred to as IPIV_1), on behalf of the horizontal right atrium