Long-term results of the Cox-Maze III procedure for persistent atrial fibrillation associated with rheumatic mitral valve disease: 10-year experience.
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.
Kim
Kwan Chang
KC
Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul, Republic of Korea.
Cho
Kwang Ree
KR
Kim
Yong-Jin
YJ
Sohn
Dae-Won
DW
Kim
Ki-Bong
KB
D000328:Adult; D000368:Aged; D001281:Atrial Fibrillation / Q000209:etiology / Q000601:surgery*; D004812:Epidemiologic Methods; D005260:Female; D006325:Heart Atria / Q000473:pathology; D006349:Heart Valve Diseases / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve; D012008:Recurrence; D012214:Rheumatic Heart Disease / Q000150:complications*; D017211:Treatment Failure; D016896:Treatment Outcome; D014262:Tricuspid Valve Insufficiency / Q000150:complications