1-is there difference between trace and mild valves regurgitation? 2-what does it mean when reported "mild/moderate" pulmonary htn?

Insignificant.: The difference between "trace" & "mild" tricuspid regurgitation is insignificant, as there is no specific treatment for the condition & no apparent consequence for having it. (In fact, there is no replacement valve surgery for the tricuspid.) Mild-to-mod pulmonary hypertension relates to high blood pressures in the lungs. The measurements aren't 100% accurate, so the degree is estimated.