Functional tricuspid regurgitation: indications, techniques, and outcomes.

Functional tricuspid regurgitation (TR) results from asymmetric dilation of the tricuspid valve annulus. This often occurs due to right ventricular enlargement and dysfunction as a consequence of myocardial or valvular abnormalities of the left heart. Even mild TR at the time of left-sided valvular surgery may worsen postoperatively, which carries poor prognostic implications. In spite of data revealing poor outcomes associated with residual TR, surgery for functional TR remains underutilized. Surgical repair techniques for TR include placement of a rigid or semi-rigid tricuspid annular ring, which has been shown to provide superior longevity compared with suture and flexible band repair techniques. Additionally, emerging percutaneous annuloplasty techniques to correct functional TR can expand interventional treatment options to patients who would otherwise carry prohibitive operative risk. © Indian Association of Cardiovascular-Thoracic Surgeons 2020.