Functional tricuspid regurgitation of degenerative mitral valve disease: a crucial determinant of survival.

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To assess functional tricuspid regurgitation (FTR) determinants, consequences, and independent impact on outcome in degenerative mitral regurgitation (DMR).All patients diagnosed with isolated DMR 2003-2011, with structurally normal tricuspid leaflets, prospective FTR grading and systolic pulmonary artery pressure (sPAP) estimation by Doppler echocardiography at diagnosis were identified and long-term outcome analysed. The 5083 DMR eligible patients [63 ± 16 years, 47% female, ejection fraction (EF) 63 ± 7%, and sPAP 35 ± 13 mmHg] presented with FTR graded trivial in 45%, mild in 37%, moderate in 15%, and severe in 3%. While pulmonary hypertension (PHTN-sPAP ≥ 50 mmHg) was the most powerful FTR severity determinant, other strong FTR determinants were older age, female sex, lower left ventricle EF, DMR, and particularly atrial fibrillation (AFib) (all P ≤ 0.002). Functional tricuspid regurgitation moderate/severe was independently linked to more severe clinical presentation, more oedema, lower stroke volume, and impaired renal function (P ≤ 0.01). Survival (95% confidence interval) throughout follow-up [70% (69-72%) at 10 years] was strongly associated with FTR severity [82% (80-84%) for trivial, 69% (66-71%) for mild, 51% (47-57%) for moderate, and 26% (19-35%) for severe, P 

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