Page 707 - ONLINE PROCEEDING BOOK WSAVA 2017
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Conclusions
RV systolic dysfunction is not detected in advanced stages of CMVD, and it is not correlated with pulmonary arterial pressure in CMVD.
WSVA7-0093
CARDIO-RESPIRATORY MEDICINE AND SURGERY
PULMONARY ARTERY SYSTOLIC FLOW CHANGES IN CONGESTIVE HEART FAILURE SECUNDARY TO CHRONIC MITRAL VALVE DISEASE IN DOGS
L.C. Petrus1, M.H.M.A. Larsson1, A.M. Gimenes1,
J.R. Castro1, M. Mantovani1, C.N. Duarte1, P.H. Itikawa1, G.T. Goldfeder1, D.S. Schwartz1
1Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, Clínica Médica, São Paulo, Brazil
Introduction
Normal pulmonary artery (PA)  ow pattern changes when increased pressure in the pulmonary vascular bed is present. These changes are characterized by reduction in acceleration time (AT), ejection time (ET) and AT/ET ratio (AT/ET) evaluated by echocardiography. Congestive heart failure (CHF) increases pulmonary vascular pressure either by increased pulmonary venous pressure or by pulmonary vascular vasoconstriction.
Objectives
To evaluate if AT, ET and AT/ET ratio of PA  ow could help to differentiate CHF from non-CHF dogs with chronic mitral valve disease (CMVD).
Methods
Forty dogs were included in a prospective observational cross-section clinical study, equally distributed
into groups, B2 and C, based on radiographic, echocardiographic evaluations and clinical signs, according to American College of Veterinary Internal Medicine Guidelines for CMVD.
Results
AT, ET and AT/ET ratio were shorter in CHF compared to non-CHF dogs. Analysis of ROC curve for CHF diagnosis showed areas under the curve of 0.83 for AT (p<0.0001), 0.83 for ET (p< 0.0001) and 0.72 for AT/ ET (p= 0.0052). For the purpose of differential diagnosis, AT higher than 76.50 ms, ET higher than 180 ms and AT/ET ratio higher than 0.42 were able to exclude CHF dogs.
Conclusions
AT, ET and AT/ET are shorter in symptomatic dogs with CMVD, and AT, ET and AT/ET seem to be useful to exclude CHF dogs with CMVD when normal PA  ow pattern is presente.
An Urban Experience
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