Evaluation of aortic and pulmonary valves flow with pulsed-wave Doppler echocardiography in healthy dogs

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.] Avaliacao dos fluxos das valvas aortica e pulmonar com ecocardiografia Doppler pulsatil em caes clinicamente sadios. Pesquisa Veterinaria Brasileira 30(7):586-592. Departamento de Clinica Medica, Faculdade de Medicina Veterinaria e Zootecnia, Universidade de Sao Paulo, Av. Professor Dr. Orlando Marques de Paiva 87, Sao 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.