AUTHOR=Barbieri Fabian , Mattig Isabel , Beyhoff Niklas , Thevathasan Tharusan , Romero Dorta Elena , Skurk Carsten , Stangl Karl , Landmesser Ulf , Kasner Mario , Dreger Henryk , Reinthaler Markus TITLE=Procedural success of transcatheter annuloplasty in ventricular and atrial functional tricuspid regurgitation JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=Volume 10 - 2023 YEAR=2023 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2023.1189920 DOI=10.3389/fcvm.2023.1189920 ISSN=2297-055X ABSTRACT=Background: Transcatheter annuloplasty is meant to target annular dilatation and is therefore mainly applied in functional tricuspid regurgitation (TR). Due to recent recognition of varying disease pathophysiology and differentiation of ventricular and atrial functional TR (VFTR and AFTR), comparative data regarding procedural success for both disease entities are required. Methods: In this consecutively enrolled observational cohort study, 65 patients undergoing transcatheter annuloplasty with the Cardioband® device were divided into VFTR (n=35, 53.8%) and AFTR (n=30, 46.2%). Procedural success was assessed by comparing changes in annulus dilatation, vena contracta (VC) width, effective regurgitation orifice area (EROA) as well as reduction in TR severity. Results: Overall, improvement of TR by at least two grades was achieved in 59 patients (90.8%), improvement by at least three grades in 32 patients (49.2%). Residual TR ≤2 was observed in 52 (80.0%) of patients. There were no significant differences in annulus diameter reduction [VFTR: 11mm (9-13) versus AFTR: 12mm (9-16), p=0.210], VC reduction [12mm (8-14) versus 12mm (7-14), p=0.868] and EROA reduction [0.62cm² (0.45-1.10) versus 0.54cm² (0.40-0.70), p=0.204]. Improvement by at least two grades [27 (90.0%) versus 32 (91.4%), p=1.0] and three grades [14 (46.7%) versus 18 (51.4%), p=0.805] were similar in VFTR and AFTR. There was no significant difference in the accomplishment of TR grade ≤2 [21 (70.0%) versus 31 (88.6%), p=0.118]. Conclusion: Transcatheter annuloplasty with the Cardioband® may be applied in both, VFTR and AFTR with evidence of significant procedural TR reduction according to our results from a real-world scenario.