Frequency and Severity of Tricuspid Regurgitation Determined by Doppler Echocardiography in Primary Pulmonary Hypertension.

We previously described a high prevalence of functional tricuspid regurgitation (TR) in patients with severely symptomatic primary pulmonary hypertension (PPH). 1 Hinderliter A.L. Willis P.W. Barst R.J. Rich S. Rubin L.J. Badesch D.B. Groves B.M. McGoon M.D. Tapson V.F. Bourge R.C. et al. Effects of long-term infusion of prostacyclin (epoprostenol) on echocardiographic measures of right ventricular structure and function in PPH. Circulation. 1997; 95: 1479-1486 Crossref PubMed Scopus (279) Google Scholar We report the relations of TR to right ventricular (RV) size and geometry, tricuspid annulus diameter, tricuspid leaflet displacement, hemodynamics, and exercise capacity in these patients.