Lacuata A Q, Yamada H, Nakamura Y, Hirose T
J Am Vet Med Assoc. 1980 Jun 15;176(12):1355-65.
Surface limb lead electrocardiograms were recorded in four cases of endocarditis in dairy cows in which the clinical diagnosis was suggested by echocardiography, then later confirmed at necropsy. The electrocardiographic findings common to all cases were sinus tachycardia, right axis deviation (between -178 and -137 degrees); and a QRS complex of a QS variety, with an averae amplitude of -0.7 mV and a mean duration of 0.06 second in lead II. These findings were not diagnostic of endocarditis.
对4例奶牛心内膜炎病例进行了体表肢体导联心电图记录。这些病例通过超声心动图作出临床诊断，随后经尸检确诊。所有病例共有的心电图表现为窦性心动过速、电轴右偏（-178度至-137度之间）；以及QS型QRS波群，在II导联中平均振幅为-0.7mV，平均时限为0.06秒。这些表现不能确诊心内膜炎。
