Fioretti P, Brower R W, Lazzeroni E, Simoons M L, Wijns W, Reiber J H, Bos R J, Hugenholtz P G
Br Heart J. 1985 Mar;53(3):248-52. doi: 10.1136/hrt.53.3.248.
The value of a QRS scoring system derived from 12 lead electrocardiograms to estimate left ventricular ejection fraction was assessed in a prospective study of 285 hospital survivors of myocardial infarction. In these patients both the QRS score and ejection fraction were measured by radionuclide ventriculography at discharge. The correlation between ejection fraction and QRS score was weak. In 22 patients who died during six to 12 months follow up the ability of the ejection fraction and QRS score to predict mortality was assessed in terms of sensitivity, specificity, predictive value of a positive and negative test, and efficiency. For ejection fraction less than 40% and a QRS score greater than or equal to 6 sensitivity was respectively 73% and 64%, specificity 73% and 56%, predictive value of a positive test 18% and 11%, predictive value of a negative test 97% and 95%, and efficiency 73% and 56%. Both ejection fraction and QRS score may be used to identify patients at low and high risk during one year follow up, but, contrary to initial expectations, the QRS score appears to be of little value in estimating ejection fraction and is less accurate than ejection fraction in predicting late survival in hospital survivors of myocardial infarction.
在一项对285例心肌梗死住院幸存者的前瞻性研究中，评估了源自12导联心电图的QRS评分系统用于估计左心室射血分数的价值。在这些患者中，出院时通过放射性核素心室造影测量QRS评分和射血分数。射血分数与QRS评分之间的相关性较弱。在6至12个月随访期间死亡的22例患者中，从敏感性、特异性、阳性和阴性试验预测值及效率方面评估了射血分数和QRS评分预测死亡率的能力。对于射血分数小于40%且QRS评分大于或等于6的情况，敏感性分别为73%和64%，特异性分别为73%和56%，阳性试验预测值分别为18%和11%，阴性试验预测值分别为97%和95%，效率分别为73%和56%。射血分数和QRS评分均可用于识别一年随访期间的低风险和高风险患者，但与最初预期相反，QRS评分在估计射血分数方面似乎价值不大，且在预测心肌梗死住院幸存者的晚期生存率方面不如射血分数准确。
