Chordal replacement with polytetrafluoroethylene sutures for mitral valve repair: a 25-year experience

Abstract

Objective: The study objective was to examine the late results of mitral valve repair with chordal replacement with polytetrafluoroethylene sutures.

Methods: From 1986 to 2004, 606 consecutive patients with degenerative mitral regurgitation had mitral valve repair with chordal replacement with polytetrafluoroethylene sutures. Patients' mean age was 57 years, and 73.6% were men. Isolated prolapse of the anterior leaflet was present in 17.6% of patients, isolated posterior leaflet prolapse was present in 29.5% of patients, and bileaflet prolapse was present in 52.9% of patients. Prolapse was corrected by creating 2 to 38 neochords of polytetrafluoroethylene sutures (mean, 13 ± 9 per patient). The mean follow-up was 10.1 years, and 96% of the patients had multiple echocardiographic studies over the years.

Results: There were 5 early and 106 late deaths. Age, diabetes, hypertension, chronic obstructive lung disease, New York Heart Association functional classes III and IV, and ejection fraction less than 40% were independent predictors of mortality. At 18 years, freedom from reoperation on the mitral valve was 90.2% ± 2.4%, freedom from recurrent severe mitral regurgitation was 91.0% ± 2.7%, and freedom from moderate or severe mitral regurgitation was 67.5% ± 4.2%. Cox regression analysis revealed that isolated prolapse of the anterior leaflet was predictive of reoperation, and that older age, hypertension, and left ventricular ejection fraction less than 40% were predictive of recurrent moderate or severe mitral regurgitation.

Conclusions: Chordal replacement with polytetrafluoroethylene sutures expands the indication of repair to patients with prolapse of multiple segments. Valve function remains stable in most patients during the first 2 decades of follow-up.