Methadone Increases and Prolongs Detomidine-Induced Arterial Hypertension in Horses, but These Effects Are Not Mediated by Increased Plasma Concentrations of Arginine Vasopressin or Serum Concentrations of Catecholamines

Methadone Increases and Prolongs Detomidine-Induced Arterial Hypertension in Horses, but These Effects Are Not Mediated by Increased Plasma Concentrations of Arginine Vasopressin or Serum Concentrations of Catecholamines

Author Pignaton, Wangles Google Scholar
Luna, Stelio Pacca Loureiro Google Scholar
Teixeira Neto, Francisco Jose Google Scholar
de Oliveira, Flavia Augusta Google Scholar
de Castro Neto, Eduardo Ferreira Autor UNIFESP Google Scholar
Naffah-Mazzacoratti, Maria da Graca Autor UNIFESP Google Scholar
Gozalo-Marcilla, Miguel Google Scholar
Abstract Catecholamines and arginine vasopressin (AVP) release can affect arterial blood pressure (ABP) and hemodynamic stability in standing, sedated horses. Six mature horses were included in this prospective, randomized, crossover, blinded, experimental study. All the horses were sedated with detomidine (DET) alone (0.01 mg/kg, IV) or combined with methadone (MET) (0.01 mg/kg DET and 0.2 mg/kg MET, IV). Cardiopulmonary data and blood samples were collected 30 minutes before (prebaseline and baseline) and for 120 minutes postinjection. The combination DET/MET produced a significant increase (31%) in mean ABP (MAP) 5 minutes after drug administration which lasted for 120 minutes. Detomidine alone induced only a short-term increase in MAP (15%) at 5 minutes compared with baseline. There were significant differences between groups at 5, 15, and from 60 to 120 minutes. Plasma AVP concentrations were higher in horses receiving the treatment DET from 60 to 120 minutes than those in the combination group, for the same period. There were no significant differences in norepinephrine and epinephrine serum concentrations respect to baseline and between treatments. Detomidine induces a short-term MAP increase, and this effect was prolonged and potentiated by MET association. There is no evidence of AVP, norepinephrine, and epinephrine involvement in this effect. (C) 2016 Elsevier Inc. All rights reserved.
Keywords Cardiovascular system
Adrenergic alpha-2 agonist
Analgesic
Opioid
Equine
Arterial blood pressure
xmlui.dri2xhtml.METS-1.0.item-coverage New York
Language English
Sponsor Sao Paulo Research Foundation (FAPESP)
Grant number FAPESP: 2008/56362-0
Date 2016
Published in Journal Of Equine Veterinary Science. New York, v. 37, p. 39-45, 2016.
ISSN 0737-0806 (Sherpa/Romeo, impact factor)
Publisher Elsevier Science Inc
Extent 39-45
Origin https://doi.org/10.1016/j.jevs.2015.10.014
Access rights Closed access
Type Article
Web of Science ID WOS:000370377900006
URI https://repositorio.unifesp.br/handle/11600/58603

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