Fig. 3
From: Interstitial pneumonia and pulmonary hypertension associated with suspected ehrlichiosis in a dog
Echocardiographic images at presentation from left apical 4-chamber view. a color Doppler map of severe tricuspid regurgitation. RA right atrium, RV right ventricle, LA left atrium, LV left ventricle. b spectral Doppler trace of tricuspid regurgitation. Tricuspid systolic velocity of 5.8Â m/s, indicating a peak tricuspid pressure gradient of approximately 136Â mm Hg, graded as severe pulmonary hypertension (reference <40Â mm Hg, severe >75Â mm Hg