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Association between heart rate, heart rate variability, cortisol, glucose and electrolytes in healthy newborn calves Arq. Bras. Med. Vet. Zootec.
Quevedo,D.A.C.; Lourenço,M.L.G.; Bolaños,C.A.D.; Takahira,R.K.; Oba,E.; Alfonso,A.; Chiacchio,S.B..
ABSTRACT This study aims at evaluating the effects of electrolytes, glucose and cortisol levels over heart rate (HR) and heart rate variability (HRV) in healthy newborn calves. Seventeen healthy Holstein calves were evaluated during their first month of life, and the plasma concentrations of glucose, cortisol, calcium, magnesium, inorganic phosphorus, sodium and potassium were analyzed. HRV indexes were determined in the time and frequency domains through the analysis of neonatal electrocardiogram recordings. In the first day, low blood levels of phosphorus presented a strong correlation with the HR and the increased high-frequency components of HRV. The plasma concentrations of magnesium decreased significantly throughout the 35 days, revealing a positive...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calves; Electrolytes; Glucose; Cortisol; Heart rate variability.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000601922
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Early and late analysis of postpartum stress in newborn foals Arq. Bras. Med. Vet. Zootec.
Cruz,R.K.S.; Alfonso,A.; Lourenço,M.L.G.; Souza,F.F.; Oba,E.; Ramos,P.R.R.; Chiacchio,S.B..
ABSTRACT The aim of this study was to evaluate newborn foals stress in the first 48 hours of life. Heart rate (HR), heart rate variability (HRV) and serum cortisol concentrations, blood glucose, and lactate were determined in foals (n = 20, Paint Horse). Cortisol concentrations decreased significantly between four and 48 hours, with the highest concentration at 4 hours after birth. Positive correlations between cortisol and lactate occurred between 12 and 16 hours. And there was a negative correlation between cortisol and lactate 4 hours after birth. Among the values obtained for HR, there was significantly difference between the the value obtained at twelve hours of life moment and all the other moments measured, the highest values were at birth, 24 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Equine neonate; Cortisol; Heart rate; Heart rate variability.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000400785
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Retrospective study of allometric relationship between heart rate, electrocardiographic parameters and bodyweight in dogs Arq. Bras. Med. Vet. Zootec.
Aleixo,A.S.C.; Alfonso,A.; Fillippi,M.G.; Chiacchio,S.B.; Lourenço,M.L.G..
ABSTRACT The allometric relationship between bodyweight (BW) and heart rate (HR) has been described as inversely proportional in domestic species, but that has been refuted. The relationship between HR and electrocardiographic variables is described in literature. However, studies about the variation and influence of factors on the hemodynamic and electrocardiographic parameters in dogs are not abundant. As the metabolic rate is defined as the production and dissipation of heat by the body surface area (BSA) in m², it is essential to define that relationship. A retrospective study was conducted to analyze the correlation between HR, ECG parameters and BW in dogs. One thousand electrocardiographic tracings were analyzed in addition to the ECG parameters and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body surface area; Weight; Allometric; Electrocardiogram.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000601800
Registros recuperados: 3
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