Outcomes of Minimally Invasive Isolated Tricuspid Valve Repair and Replacement Through Right Mini-Thoracotomy

Objective: Isolated tricuspid valve surgery is uncommon and associated with high perioperative morbidity and mortality. We aimed to study the overall outcomes of patients who underwent minimally invasive right thoracotomy tricuspid valve surgery (Mini-TVS), consisting of either tricuspid valve repair (TVre) or replacement (TVR). Methods: We performed a retrospective analysis of all Mini-TVS procedures (2017-2022), through which we identified isolated tricuspid valve surgeries. We examined in-hospital outcomes, survival analysis over a 4-year period, and competing risk analysis for reoperative surgery. Results: Among a total of 51 patients, the average age was 60 ± 16 years, and 67% (n = 34) were female. Severe tricuspid regurgitation was present in all cases. Infective endocarditis was noted in 7.8% (n = 4), and 24% (n = 12) had preexisting pacemakers. Mini-TVS included TVre in 18 patients (35%) and TVR in 33 patients (65%). The in-hospital and 30-day mortality rates were 4% (n = 2) and 6% (n = 3), respectively. At 4 years, the overall TVS survival was 76% (confidence interval, 62-93%), with no significant difference between TVre and TVR (91% vs 69%, P = .16). At follow-up, 3 patients required repeat surgery for recurrent regurgitation after 2.6, 3.3, and 11 months, with a reoperation rate of 7.3% (confidence interval, 2.4-22%) at 2 years. Factors associated with worse overall survival included nonelective surgery, right ventricular dysfunction, serum creatinine >2 g/dL, and concomitant left-sided valve disease. Conclusions: A nonsternotomy minimally invasive approach is a feasible option for high-risk patients. Midterm outcomes were similar in repair or replacement. Patients with right ventricular dysfunction and left-sided disease had worse outcomes.