Color Doppler echocardiogram of tricuspid regurgitation

The color Doppler echocardiogram of a patient with mild tricuspid regrugitation (TR) due to moderate pulmonary hypertension shows a TR jet; although the jet entrains along the interatrial septum (IAS), it has a narrow vena contracta and proximal acceleration region (PISA), suggesting that TR is mild (panel A). Panel P is a continuous wave (cw) Doppler which shows that the jet is low density, has an incomplete envelope, and a parabolic shape. These features of mild tricuspid insufficiency co-exist with and are unaffected by pulmonary hypertension. Pulmonary hypertension is identified by a peak TR velocity of 3.7 meter/sec.