The most common cause of tricuspid regurgitation is secondary to
Correct Answer: Dilation of right ventricle
Description: Ref Harrison 19 th ed pg 1548 In at least 80% of cases, TR is secondary to marked dilation of the tricuspid annulus from RV enlargement due to PA hypeension .Functional TR may complicate RV enlargement of any cause, however, including an inferior myocardial infarction (MI) that involves the RV.
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