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对不同月龄的６６只健康Ｂｅａｇｌｅ犬采用３％戊巴比妥钠麻醉，进行了９个导联的心电图描记和分析。结果表明：健康Ｂｅａｇｌｅ犬为窦性心律：３０月龄以下育成犬心律平均为１７３．８次／分，种用犬（５０月龄以上）心率平均为１３１．７次／分；二者经统计学处理，有极显著差异。Ｐ波间期平均为０．０５１±０．０１３Ｓｅｃ。Ｐ波振幅平均０．０６１ｍｖ，Ｐ波直立在导联中占９２．６％，在ａＶＲ导联中Ｐ波倒置率９８．７５％；ＱＲＳ波间期均值为：０．０２７±０．００５Ｓｅｃ。在Ⅱ导联中范围为０．０２－０．０４Ｓ－ｅｃ。在各导联中，Ⅰ导联以ｒ波为主（５１．８５％），Ⅱ导联以Ｒｓ波多见（５０％），Ｑｒ波和ｑｒ波在ａＶＲ导联中出现较多（３８．８９％，３１．４８％）。Ｔ波在Ⅰ、Ⅱ、Ⅲ、ａｖＦ、Ⅴ１、Ⅴ２、Ⅴ３导联中直立为主，在ａｖＬ导联中倒置多见（８９．２％，７３．１％）。Ｔ波方向与ＱＲＳ波一致。Ｔ波振幅平沟０．１３７ｍｖ。Ｐ－Ｒ间期范围在此０。０７５－０．１４０Ｓｅｃ。在９个导联中，无明显Ｓ－Ｐ段偏移。Ｐ－Ｐ间隔＜０．０１Ｓｅｃ。
Sixty-six healthy Beagle dogs of different months of age were anesthetized with 3% sodium pentobarbital and electrocardiographic mapping and analysis of nine leads were performed. The results showed that the healthy Beagle dogs were sinus rhythm. The average heart rate of breeding dogs under 30 months old was 173.8 beats per minute. The average heart rate of beagle dogs aged over 50 months was 131.7 beats per minute. School processing, there are very significant differences. The average P wave interval is 0.051 ± 0.013Sec. The amplitude of P wave was 0.061 mv on average, P wave was 92.6% upright in the lead, P wave inversion rate was 98.75% in the aVR lead wave, and the mean of QRS wave interval was 0.027 ± 0.005Sec. In the Ⅱ lead in the range of 0.02-0.04S-ec. In each lead, Ⅰ lead was mainly r wave (51.85%), Ⅱ lead was more common with Rs wave (50%), Qr wave and qr wave appeared more in aVR lead (38.89%) %, 31.48%). T wave was mainly upright in leads Ⅰ, Ⅱ, Ⅲ, avF, Ⅴ1, Ⅴ2 and Ⅴ3, and more common in avL leads (89.2%, 73.1%). T wave direction and QRS wave consistent. T wave amplitude flat groove 0.137mv. The P-R interval is in this range of 0.075-0.140Sec. Of the 9 leads, there is no significant S-P offset. P-P interval <0.01Sec.