Midterm results of mitral valve repair for atrial functional mitral regurgitation: a retrospective study
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(2020) 15:312
RESEARCH ARTICLE
Open Access
Midterm results of mitral valve repair for atrial functional mitral regurgitation: a retrospective study Daisuke Kaneyuki*, Hiroyuki Nakajima, Toshihisa Asakura, Akihiro Yoshitake, Chiho Tokunaga, Masato Tochii, Jun Hayashi, Akitoshi Takazawa, Hiroaki Izumida and Atsushi Iguchi
Abstract Background: Annular dilation by left atrial remodeling is considered the main cause of atrial function mitral regurgitation. Although acceptable outcomes have been obtained using mitral ring annuloplasty alone for atrial functional mitral regurgitation, data assessing outcomes of this procedure are limited. Therefore, we aimed to assess midterm outcomes of mitral valve repair in patients with atrial functional mitral regurgitation. Methods: We retrospectively studied 40 patients (mean age: 69 ± 9 years) who had atrial fibrillation that persisted for > 1 year, preserved left ventricular ejection fraction of > 40%, and mitral valve repair for atrial functional mitral regurgitation. The mean clinical follow-up duration was 42 ± 24 months. Results: Mitral ring annuloplasty was performed for all patients. Additional repair including anterior mitral leaflet neochordoplasty was performed for 22 patients. Concomitant procedures included maze procedure in 20 patients and tricuspid ring annuloplasty in 31 patients. Follow-up echocardiography showed significant decreases in left atrial dimensions and left ventricular end-diastolic dimensions. Recurrent mitral regurgitation due to ring detachment or leaflet tethering was observed in five patients and was seen more frequently among those with preoperative left ventricular dilatation. Three patients without tricuspid ring annuloplasty or sinus rhythm recovery by maze procedure developed significant tricuspid regurgitation. Five patients who underwent the maze procedure showed sinus rhythm recovery. Rates of freedom from re-admission for heart failure at 1 and 5 years after surgery were 95 and 86%, respectively. Conclusions: Mitral valve repair is not sufficient to prevent recurrent atrial functional mitral regurgitation in patients with preoperative left ventricular dilatation. Tricuspid ring annuloplasty may be required for long-term prevention of significant tricuspid regurgitation. Keywords: Atrial functional mitral regurgitation, Atrial fibrillation, Mitral valve repair, Tricuspid ring annuloplasty, Maze procedure
* Correspondence: [email protected] Division of Cardiovascular Surgery, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-shi, Saitama 3501298, Japan © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in th
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