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Objective : Recurrence of atrial fibrillation (AF) is commonly observed after AF catheter ablation. We evaluated and compare the potential of clinical non-invasive approach to predict AF recurrence after ablation in individual without structural heart diseases. Methods and results : We studied 90 Patients (57 Male; 33 female) , age mean 60,39 ± 10,59, with AF, without structural heart disease, who had ablation procedure from June 2010 to March 2013 and had recurrence within 3 months after procedure. We collect all patient’s data from medical record and direct interview. From 90 patients observed, recurrence occurred in 26 patients (28,9％). P wave duration mean on recurrence vs non recurrence patients 121,2 ± 16,3 ms vs 103,8 ± 26,5 ms ; p< 0,05. P wave dispersion mean 49,6 ± 8,2 vs 36,4 ± 5,0 ; p <0,05. Patients with P wave terminal force (PWTF)≥ 40ms (P<0,001) and interval between notch in lead II≥ 40ms (P<0,001) also have higher recurrence rate after ablation. Left atrial diameter (LAD) mean 37,3 ±2,3 vs 33,1 ±3,5 ; p < 0,05, HsCRP mean 4,9±6,8 vs 2,1±4,6 ; p<0,05. Conclusion : longer P wave duration (≥ 125ms), bigger P wave dispersion( > 40 ms), Interval between notch in lead II≥ 40 ms, PWTF≥ 40 ms are good independent predictors for AF recurrence post ablation and so does larger LAD. HsCRP also can be use as predictor but it is not adequate alone to predict AF recurrence.