Tricuspid Regurgitation
Mild Moderate Severe
1. RA/RV/IVC size Normal Normal/Dilated Dilated
2. TV
Morphology Normal Normal/Abnormal Abnormal flial
3. RA area % <20% 21-33% >33%
4. Jet
area (sq cm) <4 4-10 >10 cm
5. Length of
jet (cms) <1.5(trace) 1.5-3 3-4.5 >4.5 cm
6. VC - <0.7 >0.7
7. PISA
radius (cm) <0.5 0.6-0.9 >0.9
8. Hepatic vein
flow Systolic dominant Syst blunting Systolic flow reversal
9. CW spectral
Doppler Soft parabolic Dense variable Dense triangular early peaking
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