【摘要】 记录并比较了１８０头不同年龄比格犬的Ⅰ、Ⅱ、Ⅲ、ａＶＲ、ａＶＬ和ａＶＦ六个导联的心电图。结果发现，随着年龄的增大，心率减缓，Ｐ－Ｒ间期和Ｑ－Ｔ间期延长，但ＱＲＳ时间差异不显著。更多还原

【Abstract】 Electrocardiogram of six leads including Ⅰ,Ⅱ,Ⅲ,aVL,aVR and aVF was recorded and analysed in 180 Beagle canines at different ages.It was found that there was definite difference in heart rate,P-R interval and Q-T interval for different age.Heart rate was slower,P-R and Q-T intervals were longer in older canines than those in younger canines,but there wasn’t obvious difference in QRS interval.更多还原