Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Perinatal Cardiovascular Evaluation in Dorper Sheep: Echocardiographic Description and Behavior of the Heart Rate Variability on the Field

Version 1 : Received: 12 October 2020 / Approved: 13 October 2020 / Online: 13 October 2020 (12:15:51 CEST)

How to cite: Sarita Cruz Aleixo, A.; de Castro Ferreira Lima, M.; Holanda de Albuquerque, A.L.; Tortorelli Teixeira, R.; Alves de Paula, R.; Grandi, M.C.; Laurenti Ferreira, D.O.; Garrido Albertino, L.; Harumi Tsunemi, M.; Biagio Chiacchio, S.; Lourenço, M.L.G. Perinatal Cardiovascular Evaluation in Dorper Sheep: Echocardiographic Description and Behavior of the Heart Rate Variability on the Field. Preprints 2020, 2020100278 (doi: 10.20944/preprints202010.0278.v1). Sarita Cruz Aleixo, A.; de Castro Ferreira Lima, M.; Holanda de Albuquerque, A.L.; Tortorelli Teixeira, R.; Alves de Paula, R.; Grandi, M.C.; Laurenti Ferreira, D.O.; Garrido Albertino, L.; Harumi Tsunemi, M.; Biagio Chiacchio, S.; Lourenço, M.L.G. Perinatal Cardiovascular Evaluation in Dorper Sheep: Echocardiographic Description and Behavior of the Heart Rate Variability on the Field. Preprints 2020, 2020100278 (doi: 10.20944/preprints202010.0278.v1).

Abstract

This study aimed at evaluating changes in the clinical and echocardiographic parameters of pregnant sheep, as well as the HRV indexes due to the physiological alterations that happen at this stage implicating in high maternal metabolic demands. For this purpose, the study evaluated 10 Dorper sheep through their pregnancy, starting from the second month until the day before birth, conducting clinical, echocardiographic and electrocardiographic examinations focused on the HRV. The echocardiogram was conducted in a doppler ultrasound device with a multifrequency sectorial transducer in bidimensional mode. The HRV indexes were obtained through the Televet 100® system. There were increases in the thickness of the interventricular septum during diastole starting from the third month, and in the internal diameter of the left ventricle during systole and diastole at the second and third months, while the ejection fraction increased as the pregnancy progressed. The size of the left atrium increased starting at the second month. The SDNN, RMSSD and PNN50 HRV indexes were higher at the fifth month of pregnancy and after delivery. There were no significant differences in the frequency-domain HRV indexes during pregnancy. The gestation leads to alterations in the clinical parameters and the activity of the autonomic nervous system.

Subject Areas

sheep; gestation; hemodinamycs; heart rate variability; cardiac output

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