The present study is designed as a prospective, multicentre, multinational, randomized, 2-arm parallel group trial. Participating centres are selected based on previous experience with the surgical technique and standardised echo imaging. Each center is expected to contribute 20 to 40 patients over a 12-month enrolment period.~Patients elected to undergo mitral valve surgery (either repair or replacement) with less equal than moderate (≤+2) tricuspid regurgitation and dilated tricuspid annulus (>21mm/m2) at preoperative echocardiography will be screened. Consenting patients fulfilling all inclusion and exclusion criteria will be included in the study and assigned to elective mitral valve replacement or repair with or without concomitant tricuspid annuloplasty in a 1:1 fashion, using a blocked randomization scheme balanced within center.~After discharge patients will be assessed at 1 month (phone contact), 6 month and 1-year after surgery.
Patients elected to undergo mitral valve surgery (either repair or replacement) with less equal than moderate (≤+2) tricuspid regurgitation and dilated tricuspid annulus (>21mm/m2) at preoperative echocardiography will be screened. Consenting patients fulfilling all inclusion and exclusion criteria will be included in the study and assigned to elective mitral valve replacement or repair with or without concomitant tricuspid annuloplasty in a 1:1 fashion, using a blocked randomization scheme balanced within center.