本文报告慢性肺心病心向量图诊断的3项新指标:水平面QRS环半面积向量在—50°之后,—45°向量振幅≤0.45mV及S/—45°向量≥1.5。在114例慢性肺心病水平面QRS环逆钟向运行的图形中,上述指标中任何2项阳性即诊断肺心病右心室肥厚,其敏感度为95％,特异度97％,诊断效率95％。上述指标虽有一定局限性,但为肺心病增加了心向量图诊断的参数。 In this paper, we report three new indices for the diagnosis of chronic cor pulmonale: the half-area vector of horizontal QRS ring after -50 °, the vector amplitude of -45 ° ≤0.45 mV and the vector S / -45 ° ≥1.5. In the 114 cases of chronic pulmonary heart disease horizontal QRS loop clock running graph, any two of the above indicators that diagnose pulmonary heart disease right ventricular hypertrophy, the sensitivity was 95%, specificity 97%, the diagnostic efficiency of 95%. Although the above indicators have some limitations, but for pulmonary heart disease increased cardiac vector diagram parameters.