Early Experience With Transcatheter Mitral Valve Replacement: A Systematic Review

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Medical Technology Evaluation

Background:

• Severe mitral regurgitation poses a significant clinical challenge, particularly for patients deemed high-risk for traditional open-heart surgery.
• Transcatheter mitral valve replacement (TMVR) has emerged as a promising alternative, offering a less invasive approach.

Purpose of the Study:

• To systematically review the early clinical and procedural outcomes of Transcatheter Mitral Valve Replacement (TMVR).
• To evaluate the feasibility and effectiveness of TMVR in patients with severe mitral regurgitation and high surgical risk.

Main Methods:

• Systematic review of 16 publications reporting on 308 patients who underwent TMVR.
• Analysis of clinical characteristics, procedural success rates, and 30-day and midterm outcomes.
• Inclusion of data from published studies and international conference presentations.

Main Results:

• High technical success rate (91.7%) for TMVR procedures.
• Excellent postprocedural hemodynamic results with low residual mitral regurgitation (1.5%).
• Procedural mortality was 4.6%, with 30-day all-cause mortality at 13.6% and midterm all-cause mortality at 27.6%.

Conclusions:

• TMVR is a feasible and less invasive treatment for severe mitral regurgitation in high-risk surgical candidates.
• Successful valve implantation and favorable hemodynamics were observed.
• High rates of periprocedural complications and mortality necessitate further research and technological refinement.