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523名连续的,无选择的病人既作心电图检查测量V_1导联P波终末向量(FTF-V_1,又进行超声心动图检查测量左房大小,以评价PTF-V_1诊断左房增大的价值。PTF-V_1≤-0.04mm·s诊断左房增大的敏感性为37％,特异性为94％,阳性预告值为59％,阴性预告值为87％,总符合率为84％,结果提示:PTF-V_1阴性对排除左房增大有一定意义,PTF-V_1阳性诊断左房增大有一定的限度。为明确左房大小,以超声心动图检查为宜。
523 consecutive, nonselective patients were both electrocardiographicly measured for the V-lead P wave terminal vector (FTF-V_1) and echocardiographic measurements were taken to measure left atrial size to evaluate the value of PTF-V_1 in diagnosing left atrial enlargement .The sensitivity of PTF-V_1≤-0.04mm · s was 37%, the specificity was 94%, the positive predictive value was 59%, the negative predictive value was 87% and the total coincidence rate was 84% Tip: negative PTF-V_1 to exclude left atrial enlargement of a certain significance, PTF-V_1 positive diagnosis of left atrial enlargement has a certain limit. To determine the size of left atrium, echocardiography is appropriate.