Table 2.

Contemporary grading of tricuspid regurgitation severity (34).

Variable	Mild	Moderate	Severe	Massive	Torrential
VC (biplane)	<3 mm	3–6.9 mm	7–13 mm	14–20 mm	≥ 21 mm
EROA (PISA)	<20 mm2	20–39 mm2	40–59 mm2	60–70 mm2	≥ 80 mm2
3D VCA or quantitative EROA			75–94 mm2	95–114 mm2	≥ 115 mm2

VC, vena contracta; EROA, effective regurgitant orifice area; 3D VCA, three-dimensional vena contracta area.