What are common etiologies of tricuspid regurgitation and how is severity quantified?

• A. Functional TR from RV dilation or pressure overload; primary TR from leaflet pathology or endocarditis; quantify by jet size on color, vena contracta width, hepatic vein flow reversal, and PISA if feasible
• B. Only rheumatic TR
• C. TR severity is not quantified by imaging
• D. TR cannot be measured

Answer: (A)