Use of cardiac troponin I (cTnI) levels to diagnose severe hypoxia and myocardial injury induced by perinatal asphyxia in neonatal dogs

Autor: Keylla Helena Nobre Pacífico Pereira, Viviane Yukari Hibaru, Kárita da Mata Fuchs, Luiz Eduardo Cruz dos Santos Correia, Maria Denise Lopes, João Carlos Pinheiro Ferreira, Fabiana Ferreira de Souza, Luiz Henrique de Araújo Machado, Simone Biagio Chiacchio, Maria Lucia Gomes Lourenço
Přispěvatelé: Universidade Estadual Paulista (UNESP)
Rok vydání: 2021
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 1879-3231
Popis: Made available in DSpace on 2022-04-29T08:38:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-03-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Prolonged perinatal asphyxia and subsequent severe hypoxia are the main causes of mortality in neonatal dogs in the first days of life. In medicine, specific cardiac biochemical markers, such as troponin I, are used to diagnose ischemic and nonischemic myocardial injury in asphyxiated newborns after birth. Thus, the objectives of this study were to compare the levels of cardiac troponin I (cTnI) between asphyxiated and nonasphyxiated newborn dogs and evaluate the correlations of cTnI levels with the modified Apgar score, the levels of oxygen saturation, blood glucose, and lactatemia, and blood gas parameters. This study aimed to determine the possible use of cTnI as a marker of severe hypoxia and myocardial ischemic injury in neonatal dogs. Fifteen animals in a eutocic vaginal delivery group (VG), 15 animals in a cesarean section group (CG), and 13 animals in a hypoxia (asphyxiated) group (HG) were evaluated. The animals in the asphyxiated group were from dystocic deliveries and born by vaginal delivery or cesarean section. All groups were evaluated at birth and after 60 min. The newborns in the VG and CG exhibited mixed acidosis (respiratory acidosis due to increased partial pressure of CO2 (pCO2) and metabolic acidosis due to reduced pH and bicarbonate (HCO3) levels, base excess/deficit in the extracellular fluid compartment (BEecf), and increased lactate levels) due to transient physiological hypoxemia at birth. The cTnI levels in the VG and CG were within the reference standards for healthy dogs. No correlations between cTnI level and the other parameters were observed in the VG and CG. Newborns in the HG exhibited prominent mixed acidosis (p < 0.05) due to severe hypoxemia. The Apgar score and blood gas parameters showed that these dogs were born asphyxiated, and they presented low vitality and the need for resuscitation maneuvers. The cTnI levels in the HG were significantly higher than those in the VG and CG (p < 0.05) and above the reference standards for healthy dogs, which indicated ischemic myocardial injury. The cTnI level was negatively correlated (p < 0.05) with the parameters Apgar score, heart rate, peripheral oxygen saturation (sO2) level, reflex score, and total carbon dioxide (TCO2) level and positively correlated (p < 0.01) with lactate level. This study showed that asphyxiated newborn dogs have higher serum cTnI levels than nonasphyxiated newborn dogs; thus, the cTnI can be used as a marker of severe hypoxia and ischemic myocardial damage in newborn dogs. Veterinary Neonatology Research Group São Paulo State University (UNESP) School of Veterinary Medicine and Animal Science Department of Veterinary Clinics São Paulo State University (UNESP) School of Veterinary Medicine and Animal Science Department of Animal Improvement and Nutrition São Paulo State University (UNESP) School of Veterinary Medicine and Animal Science Department of Veterinary Surgery and Animal Reproduction Veterinary Neonatology Research Group São Paulo State University (UNESP) School of Veterinary Medicine and Animal Science Department of Veterinary Clinics São Paulo State University (UNESP) School of Veterinary Medicine and Animal Science Department of Animal Improvement and Nutrition São Paulo State University (UNESP) School of Veterinary Medicine and Animal Science Department of Veterinary Surgery and Animal Reproduction FAPESP: 2019/21366-0
Databáze: OpenAIRE
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