The Effect of Ration Supplemented With Zinc on Ecg in Broilers

Abstract

This study was carried out to evaluate the effects of ration supplemented with zinc on the electrocardiograms of 60 broiler chicks. The chicks were divided into four groups, one control and three experimental groups (II, III, IV). Zinc was given to the experimental groups at doses of 125, 500, 1000 mk/kg respectively, in their ration for 60 days. The electrocardiogram recordings were performed on chicks on the 60(th) day of the experiment. Leads I, II, III, aVR, aVL and aVF were recorded in the electrocardiographs of the chicks. All electrocardiograms exhibited P, R, S and T waves but P wave generally interfered with the T wave. No Q waves were observed. AII the waves in lead I were very low or almost isoelectric. The R and S waves in leads II and III were of about equal amplitude. The T waves in leads I, II, III and aVF were positive but in leads aVR and aVF they were negative. The heart rates of the groups were found to be 363, 362, 400 and 410 per minute respectively, but the differences among the groups were not statistically significant, in the groups, the mean electrical axis of heart was found to be between -60 degrees and -110 degrees, with their averages of -80 degrees, -85 degrees, -92 degrees and -88 degrees respectively.