Analysis of risk factors for recurrence after video-assisted pulmonary vein isolation of lone atrial fibrillation--results of 5 years of follow-up.
OBJECTIVE
The purpose of the present study was to assess the efficacy of the long-term results after video-assisted pulmonary vein isolation and left atrial appendage excision for lone atrial fibrillation (AF) and to determine the most significant risk factors for the long-term results.


METHODS
From December 2006 to December 2012, 332 consecutive patients with lone AF underwent minimally invasive surgical ablation at our center. Of the 332 patients, 91, who had undergone video-assisted pulmonary vein isolation>5 years earlier, were evaluated in the present study (48 with paroxysmal AF, 21 with persistent AF, and 22 with long-standing persistent AF). The median follow-up period was 66 months. The primary endpoint was the success rate of video-assisted pulmonary vein isolation, defined as the absence of any atrial arrhythmia recurrence lasting >30 seconds at the clinical visit and on the electrocardiogram or long-term cardiac rhythm recording after discharge.


RESULTS
During the follow-up period, 1 patient (1.1%) experienced a stroke and 4 (4.4%) died of noncardiac disease. At the 5-year follow-up point, 43 of 78 patients (55.1%) were in normal sinus rhythm. Of the 39 patients with paroxysmal AF and 39 with nonparoxysmal AF, 27 (69.2%) and 16 (44.1%) were in normal sinus rhythm, respectively. The results of the univariate and multivariate analyses of the preoperative risk factors for AF recurrence showed a left atrial diameter of ≥44 mm (hazard ratio, 5.56; 95% confidence interval, 1.68-18.387; P=.005) and an AF duration of ≥31.5 months (hazard ratio, 3.67; 95% confidence interval, 1.50-8.95; P=.004) were the most significant independent risk factors.


CONCLUSIONS
Patients with lone AF with a large preoperative left atrial diameter and long AF duration will not be suitable for video-assisted pulmonary vein isolation alone and might need to undergo ablation of the lesions.
Department of Cardiac Surgery, Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, People's Republic of China.
Qiu-Ming
QM
Hu
Department of Cardiac Surgery, Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, People's Republic of China.
Yan
Y
Li
Department of Cardiac Surgery, Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, People's Republic of China.
Chun-Lei
CL
Xu
Department of Cardiac Surgery, Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, People's Republic of China.
Jie
J
Han
Department of Cardiac Surgery, Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, People's Republic of China.
Hai-Bo
HB
Zhang
Department of Cardiac Surgery, Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, People's Republic of China.
Wei
W
Han
Department of Cardiac Surgery, Beijing Anzhen Hospital of the Capital University of Medical Sciences, Beijing, People's Republic of China. Electronic address: mxu@263.net.
Xu
X
Meng
D000368:Aged; D020517:Atrial Appendage / Q000503:physiopathology / Q000601:surgery; D001281:Atrial Fibrillation / Q000175:diagnosis / Q000401:mortality / Q000503:physiopathology / Q000601:surgery*; D017115:Catheter Ablation / Q000009:adverse effects / Q000379:methods* / Q000401:mortality; D016009:Chi-Square Distribution; D002681:China; D004562:Electrocardiography; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D016016:Proportional Hazards Models; D011667:Pulmonary Veins / Q000503:physiopathology / Q000601:surgery*; D012008:Recurrence; D012307:Risk Factors; D020775:Thoracic Surgery, Video-Assisted / Q000009:adverse effects; D013997:Time Factors; D016896:Treatment Outcome