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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
What is the most common cause of tricuspid regurgitation?
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The correct answer is  Tricuspid regurgitation most commonly arise secondary to marked dilation of the tricuspid annulus from right ventricular enlargement due to pulmonary aery hypeension. Tricuspid regurgitation can also occur secondary to right ventricular enlargement from inferior wall MI, in the late stages of hea failure due to rheumatic or congenital hea disease with severe PA hypeension, as well as in ischemic and idiopathic dilated cardiomyopathies. Infarction of RV papillary muscles, tricuspid valve prolapse, carcinoid hea disease, endomyocardial fibrosis, radiation, infective endocarditis, and trauma can also produce TR. Ref: Harrisons Internal Medicine, 18th Edition, Chapter 237