Parameters for tricuspid severity	Mild	Moderate	Severe
Anatomy of leaflets	Normal	Normal or abnormal	Abnormal, flail, noncoaptation
HV/RA/RV size	Normal	Normal or dilated	Dilated
Jet area (cm2)	<0.5	>0.5	>10 or >30% of right atrial area
Vena contracta width (cm)	<0.2	<0.7	>0.7
Pisa radius (cm)	0.5	0.6-0.9	>0.9
TR jet by CWD	Soft parabolic	Dense, variable contour	Dense, triangular, early peak
HV flow profile	S>D systolic dominance	S<D	S<0 systolic reversal
Tricuspid inflow (cm2)			E>1
EROA (ml)			>45
Effective regurgitant volume (ml)			>45

HV: Hepatic vein, RA: Right atrium, RV: Right ventricle, TR: Tricuspid regurgitation, CWD: Continuous wave Doppler, EROA: Effective regurgitant orifice area