Impact of Previous Cardiac Surgery on Outcomes After Tricuspid Valve Transcatheter Edge-to-Edge Repair: Insights from EuroTR.

Background Data on the association of previous cardiac surgery (PCS) with outcomes following tricuspid valve transcatheter edge-to-edge repair (T-TEER) are limited.Objectives This study aimed to evaluate the impact of PCS on outcomes after T-TEER.Methods This analysis included patients from the EuroTR registry (European Registry of Transcatheter Repair for Tricuspid Regurgitation; NCT0630726) who underwent T-TEER for clinically relevant tricuspid regurgitation (TR) between 2016 and 2024 and had available information on cardiac surgical history. Study endpoints were procedural TR reduction, improvement in NYHA functional class, all-cause mortality, and the composite of death or heart failure hospitalization (HFH) at 2 years.Results Among 2929 patients, 27.2% had a history of PCS. These patients exhibited a higher comorbidity burden and more advanced right heart remodeling. TR severity at baseline was comparable between groups (P = 0.095), whereas residual TR at discharge and follow-up was higher in patients with PCS (both P < 0.001). PCS independently predicted residual TR ≥ 3 + at discharge (OR: 1.41; 95% CI: 1.11-1.79; P = 0.01). T-TEER was associated with an improvement in NYHA class in patients with and without PCS (≥ 1-class reduction: 66.2% in PCS vs. 59.6% in non-PCS patients; P = 0.15). At 2 years, PCS patients had higher all-cause mortality (HR: 1.25; 95% CI: 1.04-1.50; P = 0.02) and a higher incidence of the composite endpoint of death or HFH (HR: 1.24; 95% CI: 1.05-1.46; P = 0.01).Conclusions PCS is an independent predictor of outcomes in patients undergoing T-TEER, identifying a subgroup with less pronounced TR reduction and lower long-term survival despite significant functional improvement.