Infarto agudo do miocárdio e injeção intramiocárdica experimental em cães: estudos clínico, enzimático, eletrocardiográfico e ecocardiográfico

Cavalcanti, Guilherme Albuquerque de Oliveira; Araújo, Roberto Baracat de; Melo, Eliane Gonçalves de; Moreira, M.C.V.; Borges, Karina Braga Gomes; Melo, Marília Martins; Borboleta, L.R.; Muzzi, Ruthnéa Aparecida Lázaro

doi:10.1590/s0102-09352012000200006

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Currently, the main methods available to assess the presence of myocardial ischemia in pets during the perioperative period of cardiac surgery are continuous electrocardiography [12] and transesophageal echocardiography [11]. Electrocardiographic changes and a reduction of systolic indices in response to an established ischemic process are expected [6,11].…”

Section: Introductionmentioning

confidence: 99%

Interventionist videothermometry: A new model of cardiac ischemia evaluation

Silva

Vidal

Cabral

et al. 2020

Preprint

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Background The purpose of the present study was to evaluate, through videothermometry, the temperature variation in the hearts of rabbits, that underwent induced myocardial ischemia and reperfusion. Results A total of 20 female rabbits, were divided into two groups: a treated group and a sham group. Throughout the experiment, the animals were monitored by videothermometry, observing the thermal variations of the myocardial tissue. During the experiment, at different times, blood gas tests and tests to evaluate the lactate concentrations were performed. At the end of the experiment, each heart was submitted to histopathological evaluation. In the treated group, there was a reduction in temperature of the myocardial tissue during the circulatory arrest compared to the sham group. Additionally, a colder area next to the caudal vena cava ostium and the right atrium was observed. Notably, despite the 5 minutes of cardiac arrest in the treated group, both the lactate and bicarbonate levels were maintained without significant variation. However, there was an increase in PaCO2 and pH reduction, featuring respiratory acidosis. In relation to the histopathological study, the presence of hydropic degeneration in the myocardium of animals in the treated group was observed. Conclusions Based on these results, the videothermometry was efficient in identifying the range of myocardial tissue temperature, suggesting that the first areas to suffer due to cardiac arrest were the caudal vena cava ostium and the right atrium. However, in regard to the angiographic coronary thermography, the study was not feasible due to the small size of the coronary. There was no variation between the groups regarding the presence of myocardial infarction, myocardial congestion, myocardial edema and myocardial hemorrhage.

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Section: Introductionmentioning

confidence: 99%

Interventionist videothermometry: A new model of cardiac ischemia evaluation

Silva

Vidal

Cabral

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

Interventionist videothermometry: a new model of cardiac ischemia evaluation

et al. 2020

View full text Add to dashboard Cite

Background: The purpose of the present study was to evaluate, through videothermometry, the temperature variation in the hearts of rabbits, that underwent induced myocardial ischemia and reperfusion. Results: A total of 20 female rabbits were divided into two groups: a treated group and a sham group, the treatment group underwent 5 min of cardiac arrest and reperfusion, using the inflow occlusion technique. Throughout the experiment, the animals were monitored by videothermometry, observing the thermal variations of the myocardial tissue. During the experiment, at different times, blood gas tests and tests to evaluate the lactate concentrations were performed. At the end of the experiment, each heart was submitted to histopathological evaluation. In the treated group, there was a reduction in temperature of the myocardial tissue during the circulatory arrest compared to the sham group. Additionally, a colder area next to the caudal vena cava ostium and the right atrium was observed. Notably, despite the 5 min of cardiac arrest in the treated group, both the lactate and bicarbonate levels were maintained without significant variation. However, there was an increase in PaCO2 and pH reduction, featuring respiratory acidosis. In relation to the histopathological study, the presence of hydropic degeneration in the myocardium of animals in the treated group was observed. Conclusions: Based on these results, the videothermometry was efficient in identifying the range of myocardial tissue temperature, suggesting that the first areas to suffer due to cardiac arrest were the caudal vena cava ostium and the right atrium. However, in regard to the angiographic coronary thermography, the study was not feasible due to the small size of the coronary. There was no variation between the groups regarding the presence of myocardial infarction, myocardial congestion, myocardial edema and myocardial hemorrhage.

show abstract

Infarto agudo do miocárdio e injeção intramiocárdica experimental em cães: estudos clínico, enzimático, eletrocardiográfico e ecocardiográfico

Cited by 2 publications

References 15 publications

Interventionist videothermometry: A new model of cardiac ischemia evaluation

Interventionist videothermometry: A new model of cardiac ischemia evaluation

Interventionist videothermometry: a new model of cardiac ischemia evaluation

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