Mittal S R, Srivastava P
Int J Cardiol. 1986 Oct;13(1):92-4. doi: 10.1016/0167-5273(86)90085-9.
The R/S ratio was calculated in all the six conventional precordial leads in 27 cases of emphysema and 23 cases of old anteroseptal myocardial infarction, all having poor R wave progression in the precordial leads. An R/S ratio greater than or equal to 3.5 in lead V5 was found to be most sensitive (87%), specific (83%) and accurate (85%) in differentiating poor R wave progression of old anteroseptal myocardial infarction from that due to emphysema.
在27例肺气肿患者和23例陈旧性前间壁心肌梗死患者中,对所有六个常规心前导联计算R/S比值,这些患者的心前导联均有R波进展不良的情况。结果发现,V5导联中R/S比值大于或等于3.5对鉴别陈旧性前间壁心肌梗死导致的R波进展不良与肺气肿导致的R波进展不良最为敏感(87%)、特异(83%)且准确(85%)。