Transcatheter Edge-to-Edge Mitral Valve Repair With the MitraClip G4 System

The primary objective of this study was to evaluate the effectiveness of the MitraClip G4 in the reduction of mitral regurgitation (MR).

The next-generation MitraClip G4 system was recently introduced for the treatment of MR in the United States.

The study included consecutive patients undergoing transcatheter mitral edge-to-edge repair for MR with the MitraClip G4. The key outcome was the proportion of patients with MR reduction to ≤2+ at 30 days.

Fifty-nine patients (median age 77 years, 62.7% men) were treated with the MitraClip G4. Reduction of MR to ≤2+ was achieved in 57 patients (96.6%) during the procedure, 58 patients (98.3%) at discharge, and 57 patients (96.6%) by 30 days. The median number of MitraClips used per patient was 2 (interquartile range: 1 to 3). Wide clips (NTW/XTW) were used in 82.7% of patients. The XTW clip was used most frequently as the first clip in patients with degenerative MR (65.4%) and the NTW clip in those with secondary MR (72.7%). The independent grasping mechanism was used in 49.2% of patients.

Use of the MitraClip G4 system was associated with excellent reduction in MR to ≤2+ in 96.6% of patients at 30 days. The availability of multiple MitraClip G4 sizes, especially the wide clips, and the ability to independently grasp leaflets are the likely contributors to MR reduction.