Flexible or rigid ring in mitral annuloplasty-do the results differ?

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery
• Medical Devices

Background:

• Mitral valve repair is preferred over replacement for severe primary mitral regurgitation, offering restored life expectancy and avoiding lifelong anticoagulation.
• The selection of rigid versus flexible annuloplasty rings remains a subject of debate, often based on surgeon preference.
• Carpentier's contributions significantly advanced mitral valve annuloplasty techniques over the decades.

Purpose of the Study:

• To compare the midterm outcomes of mitral valve annuloplasty using flexible versus rigid annuloplasty rings.
• To assess the impact of ring type on left ventricular size regression and the recurrence of mitral regurgitation.
• To evaluate the efficacy of mitral valve repair in patients with severe primary mitral regurgitation.

Main Methods:

• Retrospective study of 112 patients undergoing mitral valve annuloplasty between 2010 and 2014.
• Comparison of outcomes between patients who received rigid rings and those who received flexible rings.
• 5-year follow-up to assess left ventricular (LV) size and mitral regurgitation (MR) progression.

Main Results:

• No significant difference in mitral regurgitation progression was observed between the rigid and flexible ring groups at 5-year follow-up.
• Left ventricular size regression (LVIDD and LVIDS) showed no statistically significant difference between the two groups.
• Only three patients experienced significant mitral regurgitation (3+ MR) at follow-up, with similar distribution between groups.

Conclusions:

• The choice of rigid or flexible annuloplasty ring does not appear to significantly impact the midterm outcomes of mitral valve annuloplasty.
• Both ring types demonstrated comparable efficacy in preventing mitral regurgitation progression and facilitating left ventricular remodeling.
• Further research may explore long-term outcomes and specific patient factors influencing ring selection.