Nara Y, Morohoshi Y, Ikeda N, Nakayama S, Nakano T
Jikken Dobutsu. 1986 Jan;35(1):21-8. doi: 10.1538/expanim1978.35.1_21.
Electrocardiograms by standard limb lead, augumented unipolar limb lead and AB (Apex-Base) lead were recorded from 24 unanesthetized adult cats from a SPF closed colony. The unanesthetized cats were held in the sternal position or in the right lateral recumbent position by means of a net. The mean electrical axes of P, QRS and T waves were calculated on the basis of values of I, II and III leads. The ECG patterns and mean electrical axes were compared between the sternal position and the right lateral recumbent position. The results are summarized as follows. The mean values of RR duration, P wave duration, QRS complex duration, T wave duration, PQ interval and QT interval were 0.432, 0.033, 0.027, 0.101, 0.076 and 0.183 seconds, respectively. The values of duration, interval and amplitude were not prominently influenced by the change in posture. The ECG shape had a definite configuration on each lead except that leads I and a VL showed unstable patterns. Notches and R' waves appeared in every lead in many cases. There was a positive linear correlation between RR and QT duration: r = 0.798 in the sternal position and r = 0.525 in the right lateral recumbent position. The angle of QRS mean electrical axis on the horizontal plane was 66.90 degrees +/- 26.05 (SD) in the sternal position and 41.84 degrees +/- 75.23 (SD) in the right lateral recumbent position. The P and T mean electrical axes showed small variations.
从一个无特定病原体（SPF）封闭群体中选取24只未麻醉的成年猫，记录其标准肢体导联、加压单极肢体导联和AB（心尖 - 心底）导联的心电图。未麻醉的猫通过网被固定于胸骨位或右侧卧位。根据I、II和III导联的值计算P波、QRS波群和T波的平均电轴。比较胸骨位和右侧卧位时的心电图模式和平均电轴。结果总结如下。RR间期、P波时限、QRS波群时限、T波时限、PQ间期和QT间期的平均值分别为0.432秒、0.033秒、0.027秒、0.101秒、0.076秒和0.183秒。持续时间、间期和振幅的值并未受到姿势变化的显著影响。除I导联和aVL导联显示不稳定模式外，每个导联的心电图形状都有明确的形态。在许多情况下，每个导联都出现切迹和R'波。RR间期和QT间期之间存在正线性相关：胸骨位时r = 0.798，右侧卧位时r = 0.525。胸骨位时QRS平均电轴在水平面的角度为66.90度±26.05（标准差），右侧卧位时为41.84度±75.23（标准差）。P波和T波的平均电轴变化较小。
