PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Petrus L.C., Oliveira V.M.C., Pereira G.G. & Larsson M.H.M.A. 2010. [Evaluation of aortic and pulmonary valves flow with pulsed-wave Doppler echocardiography in healthy dogs.] Avaliação dos fluxos das valvas aórtica e pulmonar com ecocardiografia Doppler pulsátil em cães clinicamente sadios. Pesquisa Veterinária Brasileira 30(7):586-592. Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Professor Dr. Orlando Marques de Paiva 87, São Paulo, SP 05508-270, Brazil. E-mail: lilipetrus@hotmail.com This study evaluated aortic (AO) and pulmonary (Pul) valves flow with pulsed-wave Doppler by qualitative (presence of valvar insufficiency and characteristic of flow profile) and quantitative analysis, and the following echocardiographic parameters were obtained: peak (PV) and mean (MV) velocities, velocity-time integral (VTI), acceleration (AT) and ejection (ET) time. Thirty dogs were studied, and to be considered normal, physical, laboratory, electrocardiographic, echocardiographic (uni and bidimensional mode) exams, thoracic radiography, and measurement of the blood pressure were accomplished, and the following echocardiographic parameters were obtained: AO PV= 1.22±19.38m/s; AO MV= 0.72±0.08m/s; AO VTI= 0.14±0.02m; AO AT= 38.80±11.29ms; AO ET= 197.90±24.77ms; Pul PV= 0.95±0.18m/s; Pul MV= 0.63±0.10m/s; Pul VTI= 0.13±0.02m; Pul AT= 70.97±18.87ms; Pul ET= 203.70±28.98ms. Heart rate presented negative correlation with AO VTI, AO ET, Pul VTI, Pul AT, Pul ET, and the variable weight had positive correlation with AO VTI, AO AT, AO ET, Pul VTI, Pul ET, differently from the gender, that had no influence on the evaluated parameters. The comparison of aortic and pulmonary valves flow demonstrated AO PV and AO MV higher than Pul PV and Pul MV, respectively, AO VTI higher than Pul VTI, and Pul AT higher than AO AT.

• Doppler echocardiography pulsed-wave Doppler ecodopplercardiografia Doppler pulsado

Abstract in Portuguese:

RESUMO.- Petrus L.C., Oliveira V.M.C., Pereira G.G. & Larsson M.H.M.A. 2010. [Evaluation of aortic and pulmonary valves flow with pulsed-wave Doppler echocardiography in healthy dogs.] Avaliação dos fluxos das valvas aórtica e pulmonar com ecocardiografia Doppler pulsátil em cães clinicamente sadios. Pesquisa Veterinária Brasileira 30(7):586-592. Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Professor Dr. Orlando Marques de Paiva 87, São Paulo, SP 05508-270, Brazil. E-mail: lilipetrus@hotmail.com Avaliaram-se com Doppler pulsátil os fluxos das valvas aórtica (AO) e pulmonar (Pul) por meio de análise qualitativa (presença de regurgitações valvares e características do espectro avaliado) e quantitativa, com obtenção de parâmetros ecocardiográficos como velocidades máxima (V. Max.) e média (V. Me.), integral de velocidade (VTI), tempo de aceleração (TA) e ejeção (TE), de 30 cães considerados clinicamente sadios por meio de exames físico, laboratoriais, eletrocardiográfico, ecocardiográfico (modos uni e bidimensional), radiográfico de tórax e mensuração da pressão arterial sistêmica. Obtiveram-se os seguintes resultados para os referidos parâmetros: V.max. AO= 1,22±19,38m/s; V. Me. AO= 0,72±0,08m/s; VTI AO= 0,14±0,02m; TA AO= 38,80±11,29ms; TE AO= 197,90±24,77ms; V. Max. Pul= 0,95±0,18m/s; V. Me. Pul= 0,63±0,10m/s; VTI Pul= 0,13±0,02m; TA Pul= 70,97±18,87ms; TE Pul= 203,70± 28,98ms. Em apenas três animais observou-se regurgitação pulmonar. Alguns parâmetros apresentaram correlação negativa com a variável freqüência cardíaca (VTI AO, TE AO, VTI Pul, TA Pul, TE Pul); outros correlação positiva com a variável peso (VTI AO, TA AO, TE AO, VTI Pul, TE Pul,) e não se observou influência da variável sexo na maioria dos parâmetros avaliados. Na comparação entre os dois fluxos, observaram-se V. Max. AO e V. Me. AO maiores que V. Max. Pul. e V. Me. Pul., respectivamente, VTI AO maior que VTI Pul, e TA AO menor que TA Pul.

Abstract in English:

ABSTRACT.- Pereira G.G., Petrus L.C., Santos A.L.F., Yamaki F.L. & Larsson M.H.M.A. 2009. Evaluation of left ventricular diastolic echocardiographic parameters in healthy dogs by pulsed-wave Doppler. Pesquisa Veterinária Brasileira 29(4):291-294. Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Orlando Marques de Paiva 87, São Paulo, SP 05508-900, Brazil. E-mail: ggpereira2002@yahoo.com.br Left ventricular diastolic dysfunction plays an important role on heart failure progression. In order to obtain additional reference values of left ventricular diastolic parameters and investigate influence of common variables, peak E wave (peak E), peak A wave (peak A), E/A ratio (E/A), E wave deceleration time (EDT) and isovolumic relaxation time (IRVT) were studied in 40 clinically healthy dogs, by pulsed wave Doppler. The following values were obtained: peak E = 0.747 ± 0.117 m/s, peak A = 0.487 ± 0.062 m/s, E/A = 1.533 ± 0.198, EDT = 88.7 ± 9.2 ms and IRVT = 0.080 ± 0.009 s. Some parameters were influenced by heart rate (peak E, peak A and IRVT), by age (peak A and E/A) and by body weight (TRIV). Gender influence was absent. Values obtained can be used as reference for canine specimens but its interpretation should consider on the influence of related variables.

• Diastole pulsed-wave Doppler Dogs Left ventricle

Abstract in Portuguese:

ABSTRACT.- Pereira G.G., Petrus L.C., Santos A.L.F., Yamaki F.L. & Larsson M.H.M.A. 2009. Evaluation of left ventricular diastolic echocardiographic parameters in healthy dogs by pulsed-wave Doppler. Pesquisa Veterinária Brasileira 29(4):291-294. Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Orlando Marques de Paiva 87, São Paulo, SP 05508-900, Brazil. E-mail: ggpereira2002@yahoo.com.br Left ventricular diastolic dysfunction plays an important role on heart failure progression. In order to obtain additional reference values of left ventricular diastolic parameters and investigate influence of common variables, peak E wave (peak E), peak A wave (peak A), E/A ratio (E/A), E wave deceleration time (EDT) and isovolumic relaxation time (IRVT) were studied in 40 clinically healthy dogs, by pulsed wave Doppler. The following values were obtained: peak E = 0.747 ± 0.117 m/s, peak A = 0.487 ± 0.062 m/s, E/A = 1.533 ± 0.198, EDT = 88.7 ± 9.2 ms and IRVT = 0.080 ± 0.009 s. Some parameters were influenced by heart rate (peak E, peak A and IRVT), by age (peak A and E/A) and by body weight (TRIV). Gender influence was absent. Values obtained can be used as reference for canine specimens but its interpretation should consider on the influence of related variables.