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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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