PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

The cardiac evaluation of wild animals is still a wide and largely unknown field for several species. Thus, the objectives of this study were to evaluate cardiac function through echocardiography and obtain echocardiographic values for crab-eating foxes under pharmacological restraint. This study was done with eight males and two females under pharmacological containment of intramuscular acepromazine with meperidine followed by intravenous propofol. In the two-dimensional mode, the diameter of the aorta and left atrium and the LA/Ao ratio were obtained. In M-mode, the internal diameter of the left ventricle was measured during diastole and systole, and the shortening fraction was calculated. In the transmitral flow using the pulsed Doppler mode, we analyzed the E-wave velocity peak, A-wave velocity peak, and E/A ratio. The analysis of the isovolumetric relaxation time was performed in the apical view of five chambers using an intermediate flow between mitral influx and aortic flow, and the E-wave deceleration time was calculated. The measurements of position and dispersion of all variables were calculated, and the respective confidence intervals were set at 95%. The Doppler echocardiographic values are closer to domestic dogs, the left ventricle internal diameter in diastole was lower, and the ejection fraction was closer to that of maned wolf (Chrysocyon brachyurus). Cardiology parameters found in this study can be used as specific values for this species in the evaluation of cardiac function, as well as in other additional studies in wild animal cardiology.

• Cerdocyon thous cardiology echocardiography evaluation wild animals

Abstract in Portuguese:

A avaliação cardíaca de animais selvagens constitui um campo de pesquisa ainda pouco explorado para diversas espécies. Nesse contexto, este estudo teve como objetivos a avaliação da função cardíaca por meio da ecocardiografia e a obtenção de valores ecocardiográficos para cachorros do mato submetidos a contenção farmacológica. O estudo foi conduzido em oito machos e duas fêmeas, os quais foram submetidos à contenção farmacológica com acepromazina intramuscular e meperidina, seguida de propofol intravenoso. No modo bidimensional, as seguintes medidas foram obtidas: o diâmetro da aorta, do átrio esquerdo e a relação AE/Ao. No modo M, foram medidas a dimensão interna do ventrículo esquerdo durante a diástole e a sístole, e a fração de encurtamento foi calculada. Utilizando o modo Doppler pulsado no fluxo transmitral, foram analisados o pico de velocidade da onda E, o pico de velocidade da onda A e a relação E/A. A análise do tempo de relaxamento isovolumétrico foi realizada no corte apical de cinco câmaras, por meio de um fluxo intermediário entre o influxo mitral e o fluxo aórtico, e o tempo de desaceleração da onda E foi calculado. Todas as variáveis tiveram suas medidas de posição e dispersão calculadas, junto com intervalos de confiança a 95%. Os valores ecocardiográficos obtidos com a técnica Doppler se aproximaram mais dos observados em cães domésticos, com o diâmetro interno do ventrículo esquerdo na diástole apresentando valores menores. Além disso, a fração de ejeção se assemelhou mais à observada em lobos-guarás (Chrysocyon brachyurus). Os parâmetros cardiológicos identificados neste estudo podem ser considerados como valores específicos para essa espécie na avaliação da função cardíaca, e podem ser utilizados como referência em estudos adicionais sobre a cardiologia de animais selvagens.

• Cerdocyon thous cardiologia avaliação ecocardiográfica animais selvagens

Abstract in English:

ABSTRACT.- Silva M.B., Almeida A.O., Fadel L., Ambrósio C.E. & Miglino M.A. 2009. [Influence of angiotensin receptor blocker of renal function and arterial pression in GRMD dogs.] Influência do bloqueador de receptor de angiotensina na função renal e pressão arterial em cães GRMD. Pesquisa Veterinária Brasileira 29(4):322-326. Setor de Anatomia, Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando Marques de Paiva 87, São Paulo, SP 05508-270, Brazil. E-mail: marinabrito@usp.br Duchenne muscular dystrophy (DMD) is a neuromuscular disorder characterized by a continuous muscle necrosis and degeneration with eventual fibrosis and fatty tissue infiltration. Progressive increase in muscle interstitial fibrosis prevents the movement of myogenic cells, which is necessary for myotube formation. Canine model is the best phenocopies of the disease in humans when comparing with others animal models with dystrophy. Anti-fibrotic treatment of DMD patients, targeting the cytokine mediators, TGF-beta, and the treatment with antiinflammatories, may limit muscle degeneration and contribute for the improvement of the course of the illness. This work aimed to verify the possible adverse effects in renal physiology by means of evaluation sanguineous biochemist and arterial pressure, in order to verifying the viability of Losartan (a TGF-beta inhibiter) in affected dogs by muscle dystrophy. It was used four adults dogs, two of each gender. A dose of 50mg of Losartan was orally given once a day. The clinical exams, the kidney function, arterial blood pressure and potassium level did not show any adverse effect through the experimental period. Losartan utilization showed to be a safe therapy for the antifibrotic treatment in adults dogs, not affecting neither the kidney function nor the arterial blood pressure.

• Losartan canine dystrophy Duchenne renal function arterial pression

Abstract in Portuguese:

ABSTRACT.- Silva M.B., Almeida A.O., Fadel L., Ambrósio C.E. & Miglino M.A. 2009. [Influence of angiotensin receptor blocker of renal function and arterial pression in GRMD dogs.] Influência do bloqueador de receptor de angiotensina na função renal e pressão arterial em cães GRMD. Pesquisa Veterinária Brasileira 29(4):322-326. Setor de Anatomia, Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando Marques de Paiva 87, São Paulo, SP 05508-270, Brazil. E-mail: marinabrito@usp.br Duchenne muscular dystrophy (DMD) is a neuromuscular disorder characterized by a continuous muscle necrosis and degeneration with eventual fibrosis and fatty tissue infiltration. Progressive increase in muscle interstitial fibrosis prevents the movement of myogenic cells, which is necessary for myotube formation. Canine model is the best phenocopies of the disease in humans when comparing with others animal models with dystrophy. Anti-fibrotic treatment of DMD patients, targeting the cytokine mediators, TGF-beta, and the treatment with antiinflammatories, may limit muscle degeneration and contribute for the improvement of the course of the illness. This work aimed to verify the possible adverse effects in renal physiology by means of evaluation sanguineous biochemist and arterial pressure, in order to verifying the viability of Losartan (a TGF-beta inhibiter) in affected dogs by muscle dystrophy. It was used four adults dogs, two of each gender. A dose of 50mg of Losartan was orally given once a day. The clinical exams, the kidney function, arterial blood pressure and potassium level did not show any adverse effect through the experimental period. Losartan utilization showed to be a safe therapy for the antifibrotic treatment in adults dogs, not affecting neither the kidney function nor the arterial blood pressure.