The MOST common cause of tricuspid regurgitation is secondary to:
All mentioned condition are causes of tricuspid regurgitation. Most commonly, TR is secondary to marked dilation of the tricuspid annulus from RV enlargement due to PA hypeension. Ref: Harrisons principles of internal medicine, 18th edition, Page 1948.
Rheumatic hea disease
Dilatation of right ventricle
Coronary aery disease
Endocarditis due to intravenous drug abuse