7-Title: Clinical comparative study on electrocardiographic parameters in cross bred Holstein Friesian cattle and Murrah buffaloes

7-Title: Clinical comparative study on electrocardiographic parameters in cross bred Holstein Friesian cattle and Murrah buffaloes

Authors: CK Singh, N Singh, T Singh, J Mohindroo and Shashi Kant Mahajan

Source: Ruminant Science (2022)-11(2):291-296.

How to cite this manuscript: Singh CK, Singh N, Singh T, Mohindroo J and Mahajan Shashi Kant (2022). Clinical comparative study on electrocardiographic parameters in cross bred Holstein Friesian cattle and Murrah buffaloes. Ruminant Science 11(2):291-296.


The present study was conducted in apparently healthy cross-bred Holstein Friesian cattle (n=40) and Murrah she buffaloes (n=30). Electrocardiography was performed in bipolar base apex lead using lead II at a paper speed of 25mm/sec and calibrated at 10 mV. The amplitude (mV) of Q, R, S and T wave was significantly higher (p<0.01) in the cow as compared to buffaloes; however, the P wave amplitude (mV) showed a non-significant difference between cattle and buffaloes. The P and QRS duration (seconds) were significantly higher (p<0.01) in cattle than buffaloes however the T, PR, QT, RR and ST intervals were significantly (p<0.01) longer in buffalo than cattle. Amplitude correlated positively with age in buffaloes for Q, S and T wave and non significantly with respect to P and R waves. The duration correlation with heart rate showed a significant (p<0.05) negative correlation for P wave.


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