Cox-models derived survival curves for the composite endpoint of death and hospitalization for congestive heart failure. The relative hazard has been stratified by mild, moderate, and severe tricuspid regurgitation (TR), using the derived cut-offs for vena contracta width (VCavg), effective regurgitant orifice area (EROA), regurgitant volume (RegVol), and regurgitant fraction (RegFr), as quantitative parameters used to assess TR severity.