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本文介绍用心电图S_(V_2)、S_(V_5)计算右后向量角(RPVA)。根据三角函数关系绘成计算图,RPVA 的图算值与实测值相接近,r=0.76(P<0.05)。在120名30岁以上的正常人中,图算的RPVA 正常值上限为-110°。在实测53例慢性肺心病中,超过-110°者38例,占71.7%。47例肺气肿,超过-110°者2例。42例慢性支气管炎,超过-110°者2例,肺心病和其它两组的阳性率和平均值皆有极显著的差异(P<0.005)。RPVA 的特异度平均95.5%,诊断效率86.6%。在室内传导异常、肥厚性心肌病和心肌梗塞时,不适宜测RPVA。诊断需结合临床。
This article describes the use of electrocardiogram S_ (V_2), S_ (V_5) to calculate the right posterior vector angle (RPVA). According to the trigonometric function, the calculated value of RPVA is close to the measured value, r = 0.76 (P <0.05). Among 120 normal people over the age of 30, the upper limit of RPVA normal figure is -110 °. In the measured 53 cases of chronic pulmonary heart disease, more than -110 ° 38 cases, accounting for 71.7%. 47 cases of emphysema, more than -110 ° in 2 cases. 42 cases of chronic bronchitis, more than -110 ° in 2 cases, pulmonary heart disease and the other two groups the positive rate and the average value has a very significant difference (P <0.005). The specificity of RPVA was 95.5% on average, and the diagnostic efficiency was 86.6%. In indoors conduction abnormalities, hypertrophic cardiomyopathy and myocardial infarction, not suitable for measuring RPVA. Diagnosis should be combined with clinical.