Long-Term Results of Tricuspid Annuloplasty Using MC3 Ring for Functional Tricuspid Regurgitation.

BACKGROUND

This study aimed to evaluate the long-term results of tricuspid annuloplasty using the MC3 ring for functional tricuspid regurgitation (TR).

METHODS AND RESULTS

Between 2004 and 2014, 249 patients underwent tricuspid ring annuloplasty using the MC3 ring for functional TR (FTR). Main etiologies of FTR were left-sided valvular disease (n=211) and left-to-right shunt (n=34). Based on the interval between the operation and last echocardiographic scan, patients were divided into short-term and long-term follow-up groups. Mean follow-up duration was 84.4±37.1 months. Operative death occurred in 8 patients (3.2%). Predischarge echocardiography showed that both TR grade and systolic pulmonary artery pressure were significantly decreased compared with preoperative values, and these values were sustained during follow-up in both the short-term and long-term follow-up groups. There were no ring-related complications in either the postoperative or follow-up period, except for permanent pacemaker implantation in 2 patients. The freedom from TR ≥moderate and tricuspid valve (TV)-related events at 10 years were 92.1% and 92.8%, respectively. TV annular size was a risk factor for the recurrence of TR ≥moderate (P=0.001), and 42 mm was the cutoff value for predicting the recurrence of TR ≥moderate.

CONCLUSIONS

Tricuspid annuloplasty using the MC3 ring for FTR provides satisfactory early results that are sustained during long-term follow-up. Preoperative TV annular size was associated with the recurrence of TR ≥moderate.