Gugjoo Mudasir Bashir, Hoque Mozammel, Saxena Abhishek Chander, Zama Malik Mohamed Sham-Suz
Pak J Biol Sci. 2014 May;17(5):689-95. doi: 10.3923/pjbs.2014.689.695.
Breed-wise standard electrocardiographic values in dogs have been reported as there is variation in body and chest conformation, which limits the application of data of one breed for other breed. Labrador retrievers being originated from hunting dogs, their electrocardiogram (ECG) values might be different from standard normal range of other dog breeds. So, the purpose of the present study was to determine the standard ECG of Labrador retrievers and to check effect of body weight, gender and breed upon different ECG parameters. Six-lead ECGs, three bipolar standard limb leads (I, II and III) and three augmented unipolar limb leads (aVR, aVL and aVF), were taken from 24 Labrador retrievers positioned in right lateral recumbency without any chemical restraint. Amplitude and duration of P wave and QRS complex, PR interval, QT interval and mean electrical axis and heart rate were measured in each recording. Non-significant effect of gender and body weight was seen on all the ECG waves. Deep Q waves in Leads I, II and aVF and variation in relation to QRS pattern were noted. It was concluded that retrievers had a specific shape of QRS complex which must be considered when evaluating a patient suspected of having cardiac disease. However, amplitude and durations of different ECG waves in all the six leads were statistically not affected by gender or body weight.
由于犬类的体型和胸部形态存在差异，不同品种犬类的标准心电图值已有报道，这限制了一个品种的数据应用于其他品种。拉布拉多寻回犬起源于猎犬，它们的心电图（ECG）值可能与其他犬种的标准正常范围不同。因此，本研究的目的是确定拉布拉多寻回犬的标准心电图，并检查体重、性别和品种对不同心电图参数的影响。对24只处于右侧卧位且未使用任何化学约束的拉布拉多寻回犬进行六导联心电图检查，包括三个双极标准肢体导联（I、II和III）和三个加压单极肢体导联（aVR、aVL和aVF）。在每次记录中测量P波和QRS波群的振幅和持续时间、PR间期、QT间期、平均电轴和心率。性别和体重对所有心电图波形均无显著影响。注意到I、II和aVF导联出现深Q波以及与QRS形态相关的变化。得出的结论是，寻回犬具有特定形状的QRS波群，在评估疑似患有心脏病的患者时必须予以考虑。然而，所有六个导联中不同心电图波形的振幅和持续时间在统计学上不受性别或体重的影响。
