Veterinary Archives, Vol. 74 No. 5, 2004.
Original scientific paper
Analysis of base apex lead electrocardiograms of normal dairy cows.
Ali Rezakhani
; School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Ahmad Ali Paphan
; School of Veterinary Medicine, Ahwaz University, Ahwaz, Iran
Shahram Shekarfroush
; School of Veterinary Medicine, Shiraz University, Shiraz, Iran
Abstract
Electrocardiographic parameters of 600 normal dairy cows ranging in age from 1 to 14 years (4.97 ± 2.06 years old) were analyzed in this study. None of the cows used for this study had cardiac problems or heart sound abnormalities. Data analysis showed that heart rate was 75.73 ± 9.13 (47-90 beats per minute), P wave amplitude was 0.12 ± 0.04 (0.05-0.3 mV), r-wave amplitude was 0.15 ± 0.13 (0.05-0.95 mV), S-wave amplitude was 0.77 ± 0.27 (0.12-1.90 mV) and T-wave amplitude was -0.12 ± 0.10 (0.05-0.80 mV and +0.25 ± 0.14 (0.05-1.10mV). P wave duration was 0.08 ± 0.01 second (0.05-0.12 sec.) QRS duration was 0.06 ± 0.01 (0.04-0.10 sec.). T-wave duration was 0.09 ± 0.01 (0.05-0.16 sec.) and P-R and Q-T intervals were 0.20 ± 0.02 (0.12-0.26 sec.) and 0.37 ± 0.03 (0.22-0.48 sec.) respectively. Age and pregnancy were found to influence some of these values. This study showed that lead base apex is suitable as a standard and monitoring lead for adult Holstein cows.
Keywords
cow; dairy; electrocardiogram; base apex; leads
Hrčak ID:
68610
URI
Publication date:
20.10.2004.
Visits: 2.093 *