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OJVRTM

Online Journal of Veterinary Research©

 

Volume 18(10): 796-805, 2014.  Redacted 2018.


Effect of age on heart rate, electrocardiographic parameters and cardiac rhythm in sheep.

 

Ehsan Allah Afshari Safavi DVM DVSc, Nikoo Zonoory DVM.

 

Department of Clinical Sciences, Veterinary School, Razi University, Kermanshah, Iran.

 

ABSTRACT

 

Afshari Safavi EA, Zonoory N., Effect of age on heart rate, electrocardiographic parameters and cardiac rhythm in sheep, Onl J Vet Res., 18(10): 796-805,  2014. Heart rate, electrocardiographic parameters and cardiac rhythm in sheep were evaluated through standard bipolar base-apex lead recorded electrocardiograms in groups of 15 to 22 sheep each aged <1, 1-2, 2-3,  3-4 and >4  years. Sixty three percent had at least one arrhythmia being either sinus tachycardia, sinus arrhythmia, sinus bradycardia, sinoatrial block or atrioventricular block type II. The prevalence of normal sinus rhythm was significantly different between age groups and was higher in older animals. The mean heart rate in all sheep was 109.2, youngest 165 and oldest 88bpm. There were significant (P < 0.05) differences in PR interval, QT interval, ST interval, and T amplitude between age groups. In conclusion, we find that age has a significant effect on heart rate, electrocardiographic parameters and cardiac rhythm in sheep.

 

Keywords: age; cardiac rhythm; electrocardiographic parameters; heart rate; sheep.


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