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Eur J Cardiothorac Surg 2007;31:261-266. doi:10.1016/j.ejcts.2006.11.017
Copyright © 2007, European Association for Cardio-Thoracic Surgery. Published by Elsevier B.V. All rights reserved
a Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, Republic of Korea
b Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
Received 25 August 2006; received in revised form 11 November 2006; accepted 14 November 2006.
* Corresponding author. Address: Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, 28, Yeongeon-dong, Jongno-gu, Seoul 110-744, Republic of Korea. Tel.: +82 2 2072 3482; fax: +82 2 747 5245. (Email: kimkb{at}snu.ac.kr).
Objective: We evaluated the long-term results of the Cox-Maze III procedure (CM-III) for persistent atrial fibrillation (AF) associated with rheumatic mitral valve (MV) disease. Methods: We analyzed 127 patients who underwent the CM-III combined with a rheumatic MV procedure between 1994 and 2004. In-hospital mortalities were excluded from the study. Results: There were 10 late deaths and the mean follow-up duration was 7.1 ± 2.8 years (range, 13 months to 11.5 years). Normal sinus rhythm was restored in 88.2% (112/127) after the CM-III. Right atrial contractility was demonstrable in 100% (112/112) and left atrial contractility in 68.8% (77/112) of the patients restored to sinus rhythm. Fifteen patients never regained sinus rhythm after the CM-III (AF treatment failure). Permanent pacemakers were implanted in 4.7% (6/127) of the patients during the follow-up. Late recurrence of AF developed in 34 of 112 patients at 44 ± 27 months postoperatively, and sinus rhythm was restored in 29 of 34 patients by administration of an antiarrhythmic medication. Independent risk factors for late AF recurrence were longer duration of AF (>60 months) (odds ratio (OR) = 2.758, p = 0.025), increased left atrial size (OR = 1.113, p = 0.004). Freedom from AF recurrence was 93% at 1-year, 82% at 3 years, 71% at 5 years, and 63% at 7 years. Risk factors for AF treatment failure were longer duration of AF (>60 months) (p < 0.001) and increased patient age (p = 0.030). A higher prevalence of significant late tricuspid regurgitation was observed in patients with AF treatment failure and those with late AF recurrence. Conclusions: The CM-III for persistent AF associated with rheumatic MV disease demonstrated a progressively decreased cure rate during the follow-up period. Early surgical therapy, aggressive left atrial reduction, and correction of tricuspid regurgitation at the time of surgery may increase the long-term success rate.
Key Words: Maze procedure • Atrial fibrillation • Rheumatic valvular disease • Arrhythmia
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