Background: Early recurrences of atrial tachycardia (ERAT) commonly developed after radiofrequency catheter ablation (RFCA) for patients with atrial fibrillation (AF). However, the long-term outcomes of ERAT have not been clearly elucidated, and it remains to be determined whether ERAT predicts late recurrence of AF or AT. Methods: Of 353 consecutive patients underwent circumferential pulmonary vein (PV) isolation with or without additional linear ablation for AF, ERAT was documented in 56 patients (15.6%). We defined ERAT as early relapse of AT within 3-month period after RFCA. Results: During 21.7짹12.5 months, the recurrence rate of AF or AT was higher in patients with ERAT (41.1%) than without ERAT (11.8%, p<0.001). The number of patients taking antiarrhythmic drugs (AAD) was similar between two groups (45.5% vs. 47.8%, p=NS).The duration of ablation (174.3짹62.3 vs. 114.7짹39.5 min, p=0.046) and the total procedure time (329.3짹83.4 vs. 279.2짹79.7, p=0.027) were significantly longer in patients with late recurrence than those without late recurrence. The number of patients underwent cavo-tricuspid isthmus (CTI) ablation (73.9% vs. 42.4%, p=0.023, RR:3.8, 95% CI 1.3 to 12.2) and showing AF or AT inducibility (65.2% vs. 36.4%, p=0.036, RR:3.3, 95% CI 1.1 to 9.9) immediately after ablation was greater in patients with late recurrence than those without late recurrence. Among 13 (23.2%) who received repeat procedure in patients with ERAT, the previous ablation lines were reconnected in 11 patients including PV (n=10), roof line (n=4), left lateral isthmus (n=4), and CTI (n=4), and 10 patients (76.9%) were free from AF or AT during 6.3짹3.0 months follow-up. Conclusion: The long-term recurrence rate after AF ablation is higher in the patients with ERAT compared with the patients without ERAT, which is associated with prolonged procedure time, CTI ablation, and inducibility of AF or AT after ablation.