摘要
采用标准肢导联，加压单极肢导联，单极胸导联和A－B导联共11个导联对33头4－9月龄西宁黑白花母犊牛进行了心电图各项参数的测定和分析，结果为：（1）被检犊牛皆为窦性心律；（2）心电轴范围为－58－＋128，平均＋36．5±52．8度；（3）Ⅰ，Ⅱ，Ⅲ，aVF,V1和A－B导联的P波大部分为正向波，而aVR,V2,V3 和V4导联则为负向波；（4）aVR,V1,V2和A－B导联的TI皮大部分为正向波，而I，II，III,aVF,V3和V4导联则为负向波；（5）I，II，aVL,aVF,V2,V3和V4导联的QRS综合波大部分为正向波型（R或qR等），在而aVR,V1和A－B导联则为负向波型（rS或QS等）。
The various parameters were measured and analysed on electrocardi- ogram(ECG)traced from 11 leads in total,which included standard limb leads,augment unipolar limb leads,unipolar chest leads and A-B lead,in 33 Xining Black-white female calves ranging in age from four to nine months.The results were showed as follows,(1)There was a sinus rhythm in every calf examined;(2)The average axis of QRS complex was 36.5±52.8°ranged from-58°to 128°;(3)The P waves were mostly positive direction on the ECG traced from Ⅰ,Ⅱ,Ⅲ,aⅤF. Ⅴ_1 and A-B leads,but were negative one from aⅤR,Ⅴ_2,Ⅴ3 and Ⅴ_4 leads;(4)The T waves were mostly positive direction on the ECG traced from aⅤR,Ⅴ_1,Ⅴ_2 and A-B loads,but were negative one from Ⅰ, Ⅱ.Ⅲ,aⅤF,Ⅴ_3 and Ⅴ_4 leads;(5)The QRS complex presented mostly positive wave-forms(R.qR or others)on the ECG traced from Ⅰ,Ⅱ, aⅤL.aⅤF,Ⅴ_2,Ⅴ_3 and Ⅴ_4 leads,but presented negative one(rS,QS or others)from aVR,Ⅴ_1 and A-B leads.
