PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Giannico A.T., Somma A.T., Lange R.R., Andrade J.N.B.M., Lima L., Souza A.C. & Montiani-Ferreira F. 2013. [Electrocardiographic values in marmosets (Callithrix penicillata).] Valores eletrocardiográficos em saguis-de-tufo-preto (Callithrix penicillata). Pesquisa Veterinária Brasileira 33(7):937-941. Departamento de Medicina Veterinária, Universidade Federal do Paraná, Rua dos Funcionários 1540, Curitiba, PR 80035-050, Brazil. E-mail: amaliagiannico@uol.com.br Knowledge of cardiac parameters in experimental animal models is essential for comparative medical research. Our study aimed to establish electrocardiographic parameters and reference values for marmosets (Callithrix penicillata). Nineteen healthy adult marmosets were used. A combination of tiletamine and zolazepam was used for chemical restrained before performing electrocardiography (ECG). A computerized ECG machine was used. Values of the ECG parameters were a mean heart rate of 264±74 beats/min, a variation MCA between 60° and -90°, a mean P wave duration of 34±6ms and amplitude of 0.132±0.051mV, a mean PR interval duration of 56±11ms, a mean QRS complex duration of 35±7ms and amplitude of 0.273±0.269mV, a mean QT interval duration 130±26ms, ST segment was isoelectric (13 animals) and with elevation (six animals) and a mean T wave amplitude of 0.19±0.083mV and positive. There was no significant difference between males and females. Thus, the electrocardiographic parameters obtained in our study in marmosets can be used as a reference values to in other future researches, providing researchers electrocardiographic parameters that contribute with the literature.

• Marmoset Callithrix penicillata saguis-de-tufo-preto

Abstract in Portuguese:

RESUMO.- Giannico A.T., Somma A.T., Lange R.R., Andrade J.N.B.M., Lima L., Souza A.C. & Montiani-Ferreira F. 2013. [Electrocardiographic values in marmosets (Callithrix penicillata).] Valores eletrocardiográficos em saguis-de-tufo-preto (Callithrix penicillata). Pesquisa Veterinária Brasileira 33(7):937-941. Departamento de Medicina Veterinária, Universidade Federal do Paraná, Rua dos Funcionários 1540, Curitiba, PR 80035-050, Brazil. E-mail: amaliagiannico@uol.com.br O conhecimento de parâmetros cardíacos em animais modelo experimentais é essencial para a investigação médica comparativa. Nosso estudo teve como objetivo estabelecer parâmetros eletrocardiográficos e valores de referência para saguis-de-tufo-preto (Callithrix penicillata). Dezenove saguis-de-tufo-preto adultos saudáveis foram utilizados. Uma combinação de tiletamina e zolazepam foi empregada para contenção química antes da realização do exame eletrocardiográfico (ECG). Foi utilizado para o exame de ECG um equipamento computadorizado. Os valores dos parâmetros do ECG encontrados foram frequência cardíaca média de 264±74 bpm, uma variação do eixo cardíaco médio entre 60° e -90°, a duração da onda P média de 34±6ms e amplitude de 0,132±0,051mV, um intervalo PR com duração de 56±11ms, duração média do complexo QRS de 35±7ms e amplitude de 0,273±0,269mV, duração do intervalo QT de 130±26ms, segmento ST isoelétrico (13 animais) e com supradesnível (seis animais) e uma amplitude de onda T de 0,19±0,083mV e com polaridade positiva. Não houve diferença significativa entre machos e fêmeas. Os parâmetros eletrocardiográficos obtidos em nosso estudo em saguis-de-tufo-preto podem ser utilizados como referência em outras pesquisas futuras, oferecendo aos pesquisadores parâmetros eletrocardiográficos que contribuem com a literatura.

Abstract in English:

ABSTRACT.- Andrade J.N.B.M., Stopiglia A.J., Fantoni D.T., Abduch M.A. & Kahvegian M. 2009. Outflow occlusion for circulatory arrest in dogs. Pesquisa Veterinária Brasileira 29(2):137-142. Hospital Veterinário, Universidade de Franca, Av. Dr. Armando Salles Oliveira 201, Franca, SP 14404-600, Brazil. E-mail: jamescardio@terra.com.br The purpose of this study was to evaluate the possibility of producing circulatory arrest by occlusion of the pulmonary trunk as an alternative to the venous inflow occlusion through the left hemithorax. Eight healthy mongrel dogs were divided in two groups. Group I underwent 4 minutes of outflow occlusion and Group II was submitted to 8 minutes of circulatory arrest. Outflow occlusion was performed through left thoracotomy and pericardiotomy by passing a Rumel tourniquet around the pulmonary trunk. Physical examination, electrocardiography, echocardiography, blood gas analyses, hemodynamic, and oxygen transport variables were obtained before and after the procedure. The dogs from Group I did not have any clinical, electrocardiographic, echocardiographic, or hemo-dynamic abnormalities after anesthetic recover. In the Group II, only one dog survived, which had no clinical, electrocardiographic, or echocardiographic abnormalities. In this last dog, just after releasing the occlusion, it was detected increases in the following parameters: heart rate (HR), systolic, diastolic and mean arterial blood pressure (SAP; DAP; MAP), pulmonary artery pressure (PAP), pulmonary wedge pressure (PWP), central venous pressure (CVP), cardiac output (CO), systolic index (SI), cardiac index (CI), left and right ventricular stroke work (LVSW; RVSW), oxygen delivery index (DO2), oxygen consumption index (VO2), and oxygen extraction (O2 ext). Moreover, the oxygen content of arterial and mixed venous blood (CaO2; CvO2), and the arterial and mixed venous partial pressure of oxygen (PaO2; PvO2) were decreased 5 minutes after circulatory arrest. Outflow occlusion is a feasible surgical procedure for period of 4 minutes of circulatory arrest.

• Outflow occlusion circulatory arrest dogs

Abstract in Portuguese:

ABSTRACT.- Andrade J.N.B.M., Stopiglia A.J., Fantoni D.T., Abduch M.A. & Kahvegian M. 2009. Outflow occlusion for circulatory arrest in dogs. Pesquisa Veterinária Brasileira 29(2):137-142. Hospital Veterinário, Universidade de Franca, Av. Dr. Armando Salles Oliveira 201, Franca, SP 14404-600, Brazil. E-mail: jamescardio@terra.com.br The purpose of this study was to evaluate the possibility of producing circulatory arrest by occlusion of the pulmonary trunk as an alternative to the venous inflow occlusion through the left hemithorax. Eight healthy mongrel dogs were divided in two groups. Group I underwent 4 minutes of outflow occlusion and Group II was submitted to 8 minutes of circulatory arrest. Outflow occlusion was performed through left thoracotomy and pericardiotomy by passing a Rumel tourniquet around the pulmonary trunk. Physical examination, electrocardiography, echocardiography, blood gas analyses, hemodynamic, and oxygen transport variables were obtained before and after the procedure. The dogs from Group I did not have any clinical, electrocardiographic, echocardiographic, or hemo-dynamic abnormalities after anesthetic recover. In the Group II, only one dog survived, which had no clinical, electrocardiographic, or echocardiographic abnormalities. In this last dog, just after releasing the occlusion, it was detected increases in the following parameters: heart rate (HR), systolic, diastolic and mean arterial blood pressure (SAP; DAP; MAP), pulmonary artery pressure (PAP), pulmonary wedge pressure (PWP), central venous pressure (CVP), cardiac output (CO), systolic index (SI), cardiac index (CI), left and right ventricular stroke work (LVSW; RVSW), oxygen delivery index (DO2), oxygen consumption index (VO2), and oxygen extraction (O2 ext). Moreover, the oxygen content of arterial and mixed venous blood (CaO2; CvO2), and the arterial and mixed venous partial pressure of oxygen (PaO2; PvO2) were decreased 5 minutes after circulatory arrest. Outflow occlusion is a feasible surgical procedure for period of 4 minutes of circulatory arrest.