27-Title: Electrocardiographic values in neonatal dairy calves with common external congenital abnormalities
Authors: Mujeeb Fazili, Hiranya Bhattacharyya, Imran Khan and Noori Tufani
Source: Ruminant Science (2015)-4(1):115-120.
How to cite this manuscript: Fazili Mujeeb, Bhattacharyya Hiranya, Khan Imran and Tufani Noori (2015). Electrocardiographic values in neonatal dairy calves with common external congenital abnormalities. Ruminant Science 4(1):115-120.
Present study was conducted to describe the electrocardiogram of neonatal calves with common external congenital abnormalities. Twenty dairy calves presented for the treatment of congenital contracted flexor (n=8), atresia ani (n=6) and umbilical hernia (n=6) were used in the present study. Single channel electrocardiograph was used with 25 mm/s paper speed and calibration 10 mm/mV to obtain the Einthoven standard lead II ECG tracings. Calves with atresia ani were presented for treatment early (3.60±2.135 days) than those with contracted flexors (7.14±3.601 days) and umbilical hernia (45.00±6.708 days). Sinus rhythm was present in all of them. The heart rate (mean±SD) was lowest in calves with umbilical hernia (78.80±6.175 beats/min) and highest in those with contracted flexors (122.00±10.291 beats/min). In most (17/20) of the calves, the P wave was positive and its shape varied from pyramidal to peak. Several configurations of QRS complexes were noticed but qR was the single most frequent (7/20) pattern. T wave was positive in nine and negative in 11 calves. The age of the calves, VAT, R-R and S-T segments, Q-T and T-Q interval values (mean±SD) of the calves with umbilical hernia were significantly more than the corresponding values obtained in the remaining two groups. All these parameters except VAT and T-Q interval also differed significantly between calves with contracted flexors and atresia ani. As compared to the calves with umbilical hernia, stress changes were detected in the electrocardiogram of calves with contracted flexors and atresia ani. The changes were more marked in the calves with contracted flexors.
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