草原兔尾鼠心电图的分析

An Anlysis of Electrocardiogram in the NormalSteppe Lemming ( Lagurus lagurus )

本文采用标准双极导联（Ⅰ、Ⅱ、Ⅲ）、加压单极肢导联（ａＶＲ、ａＶＬ、ａＶＦ）和单极胸导联（Ｖａ、Ｖｂ、Ｖｃ），对经１０％乌拉坦麻醉状态下的１１９只成体草原兔尾鼠进行心电图测定，同时对２０只昆明系小白鼠作为对照比较。结果表明，草原兔尾鼠的平均心率为５５８．５４±５４．５９次／ｍｉｎ，均为窦性心率，额面心电轴平均５９．６１±１２．６３度。ＰＤ－Ｒ、ＱＲＳ波、Ｑ－Ｔ、Ｐ波平均间期分别为３８．２９±６．４８、１２．７０±０．４６、２７．６２±７．３７、１２．３４±４．０９毫秒。Ｐ波和Ｔ波的方向与主波Ｒ波一致。在Ⅰ、Ⅱ、ⅢａＶＬ、ａＶＦ和Ｖａ导联为正，在ａＶＲ导联均为负向。无典型的Ｓ－Ｔ段，ＱＲＳ波群与Ｔ波部分重叠，Ｑ－Ｔ间期较短。

he electrocardiogram of 119 Lagurus lagurus, anaesthet ized w ith the10% solut ion of urethanum, wsre studied. Leading methods includedstandard limb lead (ⅠⅡⅢ ) , the augmented limb leads ( aVR, aVF.aVL) and the augmented thorax leads (Va. Vb, Vc).20 white mice ofKunming strain were studied and coinpared.The results are as follows: the mean heart rate of Lagurus laguruswas 558.54 54.59/min. and a sinus rhythm was shown in all mice.Themean cardiac electrical axis was 59.61 12.63.The average duration of P-R,QRS, Q-T and P wave was 38.29 6.46ms, 12.70 6.46ms, 27.62 7.37ms.12-34 4.09 ms respectively.P and T wave in leads aVF and Va isof positive form, their direction of wave were consistent with R wave,but in aVR is of negative form.There seemed no typical S-T segment.there was part overlap between QRS wave and T wave, the duration of Q-T was fairly short.