Electrocardiographic Studies on Neonatal Period of Holstein Dairy Calves

Yıl 2015, Cilt: 41 Sayı: 2, 167 - 171, 04.07.2015

Aliasghar Chalmeh

Öz

Several physiological alterations may occur in cardiovascular system during fetal life to the neonatal period. Electrocardiographic studies in neonatal period may assist veterinarians to evaluate cardiovascular system in this period. Five multiparous high producing Holstein dairy cows were monitored at close-up dry period to calving. Electrocardiograms were recorded from their calves immediately and 5, 10, 15, 20, 25, 30 and 35 days after birth and all electrocardiographic parameters were evaluated. Durations of P, R and T waves were increased significantly from birth to the end of neonatal period (P<0.05). R and T amplitudes were significantly elevated but P amplitude declined significantly. There were significant increasing patterns in PR, RR, QT and ST intervals during neonatal period (P<0.05). Based on these findings, it may be suggested that physiological alterations of the electrocardiographic parameters occur during the neonatal period of the Holstein dairy calves at neonatal period. These data could provide a better understanding of interpretation of the electrocardiographic alterations among neonatal calves.

Anahtar Kelimeler

Electrocardiographic parameters, Neonatal period, Holstein dairy calves

Yeni Doğan Holştayn Buzağılarda Elektrokardiyografik Çalışmalar

Öz

Fötal hayattan yeni doğan dönemine kadar kardiyovasküler sistemde çeşitli fizyolojik değişiklikler meydana gelebilir. Yeni doğan dönemindeki elektrokardiyografi çalışmaları, bu dönemdeki kalp-damar sisteminin durumunu değerlendirmek için veteriner hekimlere yardım edebilir. Yüksek süt üretimine sahip, birden fazla doğum yapmış olan beş adet Holştayn inek kuru dönemden buzağılamaya kadar takip edilmiştir. Elektrokardiyogramlar doğumdan hemen sonra buzağıların doğumunu takibinden 5, 10, 15, 20, 25, 30 ve 35 gün sonra kaydedilmiştir ve tüm elektrokardiyografik parametreler değerlendirilmiştir. Doğumdan yeni doğan dönemin sonuna kadar P, R ve T dalgalarının süreleri anlamlı olarak artmıştır (P<0,05). R ve T amplitüdleri anlamlı olarak yükselmiş ancak P amplitüdünde önemli ölçüde düşüş bulunmuştur. Yeni doğan döneminde PR, RR, QT ve ST aralıklarında önemli artışlar gözlenmiştir (P<0,05). Bu bulgulara dayanarak, yeni doğan döneminde Holştayn buzağılara ait elektrokardiyografik parametrelerdeki fizyolojik değişikliklerin, yeni doğan döneminde ortaya çıktığı söylenebilir. Bu veriler, yeni doğan buzağılarda elektrokardiyografik değişikliklerin yorumlanmasının daha iyi anlaşılmasını sağlayabilir.

Anahtar Kelimeler

Elektrokardiyografik parametreler, yeni doğan dönem, Holştayn buzağılar

Kaynakça

• Ardran, G.M., Dawes, G.S., Prichard, M.M., Reynolds, S.R.M., Wyatt, D.G., 1952. The effect of ventilation of the fetal lungs upon the pulmonary circulation. Journal of Physiology 118, 12-22.
• Chalmeh, A., Pourjafar, M., 2013. Cardiac arrhythmias in healthy newborn female Holstein dairy calves. Online Journal of Veterinary Research 17, 391-395.
• Chalmeh, A., Pourjafar, M., Badiei, K., Naghib, M., 2013. Effect of aging on normal electrocardiographic parameters of dromedary camels. Online Journal of Veterinary Research 17, 626-631.
• Chalmeh, A., 2014. Changes of the electrocardiographic parameters during aging in clinically healthy Holstein cattle. Bulgarian Journal of Veterinary Medicine, In Press.
• Detweiler, D.K., Riedesel, D.H., 1993. Regional and Fetal Circulations. In: Swenson, M.J., Reece, W.O. (Ed), Duke’s Physiology of Domestic Animals. 11th edition, Ithaca (NY), Cornell University Press, pp. 227.
• Garson, Jr.A., Bricker, J.T., Fisher, D.J., 1998. The Science and Practice of Lippincott Williams and Wilkins, pp. 89-101.
• Jones, J., Srodulski, Z.M., Romisher, S., 1990. The aging The electrocardiogram. Emergency Medicine 8, 240-245. American Journal of
• Kasari, T.R., 1994. Physiologic mechanisms of adaptation in the fetal calf at birth. Veterinary Clinics of North America, Food Animal Practice 10, 127-136.
• Macfarlane, P.W., McLaughlin, S.C., Devine, B., Yang, T.F., 1994. Effects of age, sex, and race on ECG interval measurements. Journal of Electrocardiology 27, 14-19.
• O'Connor, M., McDaniel, N., Brady, W.J., 2008. The pediatric electrocardiogram. Part I: Age-related interpretation. The American Journal of Emergency Medicine 26, 221- 228.
• Pennisi, D.J., Rentschler, S., Gourdie, R.G., Fishman, G.I., Mikawa, T., 2002. Induction and patterning of the cardiac conduction system. The International Journal of Developmental Biology 46, 765-775.
• Poulsen, K.P., McGuirk, S.M., 2009. Respiratory disease of the bovine neonate. Veterinary Clinics of North America, Food Animal Practice 25, 121-137.
• Pourjafar, M., Badie, K., Chalmeh, A., 2012. Evaluation of ST- segment duration and morphology of standard base apex lead electrocardiograms in different age groups of apparently healthy Holstein cattle. Journal of the Faculty of Veterinary Medicine, Istanbul University 38, 51-57.
• Pourjafar, M., Badiei, K., Chalmeh, A., Sanati, A.R., Bagheri, M.H., Badkobeh, M., Shahbazi, A., 2011. Cardiac arrhythmias in clinically healthy newborn Iranian fat- tailed lambs. Global Veterinaria 6, 185-189.
• Radostits, O.M., Gay, C.C., Hinchcliff, K.W., Constable, P.D., 2007. Diseases of the Cardiovascular System. In: Veterinary Medicine: A Text Book of the Diseases of Cattle, Horses, Sheep, Pigs and Goats. 10th ed., Elsevier, pp. 399-438.
• Rurak, D.W., Richardson, B.S., Patrick, J.E., Carmichael, L., Homan, J., 1990. Blood flow an oxygen delivery to fetal organs and tissues during sustained hypoxemia. American Journal of Physiology 258, R1116-1122. L., Electrocardiographic parameters of free-ranging roe deer (Capreolus capreolus). Journal of Zoo and Wild Life Medicine 32, 441-446. Suarez, L.M., 2001.