Transcatheter Edge-to-Edge Repair for Tricuspid Regurgitation-A Systematic Review and Meta-Analysis

Transcatheter edge-to-edge repair (TEER) has emerged as a widely accepted procedure for tricuspid regurgitation (TR) as gauged by echocardiographic parameters and clinical outcomes. Our study aims to assess TR severity and other echocardiographic outcomes in patients undergoing TEER with TriClip, MitraClip, and PASCAL devices. A literature search of 5 databases was performed until 1st June 2023. Randomized controlled trials (RCTs) or observational studies with moderate to severe (grade III-V) TR patients undergoing isolated TEER were considered eligible. Echocardiographic, and quality of life determining outcomes such as improvement in TR severity grade ≥3, New York Heart Association (NYHA) class ≥3, procedural success, 6-minute walking distance (6MWD), and adverse outcomes were analyzed. Grade assessment was performed and studies were assessed for risk of bias and publication bias. We included 15 studies (14 observational and 1 RCT) in our paper. Analysis revealed a substantial reduction in TR volume (P < 0.00001), TR grading (P < 0.00001), tricuspid annular diameter (P < 0.00001), proximal isovelocity surface area radius (P < 0.00001), effective regurgitant orifice area (P < 0.00001), and improvement in NYHA class (P < 0.00001) at 30 days from baseline, postprocedurally. A significant increase in 6MWD at 1 year (P = 0.001) was also recorded. No significant differences in left ventricular ejection fraction (P = 0.87), fractional area change (P = 0.37), or tricuspid annular plane systolic excursion (P = 0.76) were observed. TEER procedural success was 97%. TEER produced a significant reduction in TR grade and volume, NYHA class, 6MWD, and showed prominent procedural success. Large scale RCTs comparing the TEER devices are needed to strengthen the present findings.