©1994-2009 All Rights Reserved. Online Journal of Veterinary Research. You may not store these pages in any form except for your own personal use. All other usage or distribution is illegal under international copyright treaties. Permission to use any of these pages in any other way besides the before mentioned must be gained in writing from the publisher. This article is exclusively copyrighted in its entirety to OJVR publications. This article may be copied once but may not be, reproduced or re-transmitted without the express permission of the editor
OJVRTM
Online
Journal of Veterinary Research©
Volume 13
(1):111-116, 2009
Normal electrocardiographic
parameters of
base apex lead of horses
Rezakhani A1, Goodarzi
M 2, Zarifi M1, Orangi H1
1Department of Clinical Studies,
ABSTRACT
Rezakhani A, Goodarzi M, Zarifi M, Orangi H Normal electrocardiographic parameters of base apex lead of
horses, Online J Vet Res, 13 (1):111-116,
2009. This study was conducted on
368 horses of both sexes and different ages. Horses were included in this study
after a careful clinical examination to exclude concomitant heart disease.
The electrocardiogram (ECG) was recorded on a base apex lead using
bipolar limb lead I while the animal was kept quiet. Mean heart rate was
39.39±0.44; the heart rate of female was higher than males and the heart
rate of less than 3 years old was higher than those older than 6 years. The P
wave was positive in all horses. Direction of the main section of the QRS complex
was negative and mainly biphasic. The T wave direction was variable. The
amplitudes of P, R, S, T (+) and T (-) were 0.251 ± 0.005; 0.337 ± 0.015; 2.231
± 0.034; +0.293 ± 0.012; -0.613 ± 0.021, respectively, and the durations of P,
P-R, QRS, Q-T and T were 0.128 ± 0.001; 0.321 ± 0.003; 0.102 ± 0.001; 0.477 ±
0.003 and 0.121 ± 0.001, respectively.
Key words:
ECG, base apex, lead, horse