Stern J A, Hinchcliff K W, Constable P D
Department of Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA.
Aust Vet J. 2013 Jul;91(7):281-6. doi: 10.1111/avj.12076.
To determine whether body position (standing vs right lateral recumbency) altered the quality of the electrocardiogram (ECG) and value of ECG variables in dogs when the ECG was recorded using American Heart Association guidelines for frequency response.
Crossover study using a convenience sample.
ECGs were recorded twice in 65 sled dogs in random order with each dog standing or placed in right lateral recumbency. Lead II and three semi-orthogonal leads (I, aVF, and V10 ) were recorded and muscle tremor artefact was assessed.
Lead II ECGs obtained from dogs in right lateral recumbency had less muscle tremor artefact and consequently a shorter QRS duration than ECGs obtained with the dogs standing. The P, Q, R and S wave amplitudes differed in selected leads and the mean electrical axis was shifted 20° to the right when dogs were in right lateral recumbency.
Right lateral recumbency improves the quality of ECG recording in dogs by decreasing muscle tremor artefact, alters the amplitude of P, R and S waves in specific leads and results in a rightward shift in the mean electrical axis, relative to standing.
当按照美国心脏协会频率响应指南记录心电图时，确定犬只的体位（站立与右侧卧位）是否会改变心电图（ECG）的质量以及ECG变量的值。
采用便利样本的交叉研究。
对65只雪橇犬的心电图进行两次记录，记录顺序随机，每只犬分别处于站立位或右侧卧位。记录II导联和三个半正交导联（I、aVF和V10），并评估肌肉震颤伪迹。
与犬只站立时记录的心电图相比，右侧卧位犬只的II导联心电图肌肉震颤伪迹更少，因此QRS波时限更短。特定导联的P、Q、R和S波振幅有所不同，且犬只处于右侧卧位时平均电轴向右偏移20°。
相对于站立位，右侧卧位可通过减少肌肉震颤伪迹来提高犬只心电图记录的质量，改变特定导联中P、R和S波的振幅，并导致平均电轴向右侧偏移。
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