When should the tricuspid valve be repaired during mitral valve repair?

Purpose of review Management of tricuspid regurgitation and annular dilation during mitral valve repair remains controversial. We review the latest evidence on indications to repair the tricuspid valve during mitral valve repair and discuss surgical strategies and complications. Recent findings Concomitant tricuspid valve repair of moderate tricuspid regurgitation is effective in reducing tricuspid regurgitation progression at 2 years, but has not shown benefit to late survival, quality of life, or functional benefit, and is associated with increased permanent pacemaker implantation (PPM) rates, which is associated with reduced late survival. Progression of less than moderate tricuspid regurgitation with annular dilation alone is uncommon, obviating the need for concomitant repair. Summary Repairing concomitant moderate tricuspid regurgitation at the time of mitral repair reduces tricuspid regurgitation progression at 2 years, at the cost of a higher PPM implantation rate. However, repairing less than moderate tricuspid regurgitation for annular dilation alone has not been shown to reduce tricuspid regurgitation progression, bringing current guideline recommendations surrounding repair for annular dilation into question. Longer-term follow-up data, at 5 years, will shed further light on this topic.