Follow-up
The median follow-up period after CA was 3.6±3.2 years (median, 2.1 years; IQR, 0.89-6.84). The Kaplan-Meier analysis of freedom from atrial arrhythmia after the Maze procedure was 79.9% at 1-year follow-up and 69.3% at 4-year follow-up. AADs were taken after CA in 20 cases (54.1%). There were no complications throughout the entire period in this study. There were 2 unsuccessful cases in the first session, in which 1 was septal AT and 1 was M-AFL. Twelve cases had recurrence after CA, and 4 of them underwent CA twice. Patients 28, 29, 36, and 38 experienced recurrence (10.8% of 37 cases), and CA was performed again. All four cases reached the endpoint in the second session, and no recurrence of atrial arrhythmia was observed in Patients 36 and 38 (Fig 4 ). The remaining 8 cases were not willing to undergo CA twice and had a good course of AADs.