Figure 4.

 Kaplan–Meier estimates of freedom from any documented atrial arrhythmia after a single procedure, with or without the use of antiarrhythmic medications, for different groups of patients depending on acute outcomes during the index procedure: (A) patients for which AF was terminated by ablation have a statistically significant lower rate of recurrences than patients for which AF could not be terminated (p = 0.004). (B) Patients converted into sinus rhythm by ablation have a statistically significant lower rate of recurrences than patients converted into atrial tachycardia without further restoring sinus rhythm by ablation (p = 0.03) and patients for which AF could not be terminated (p < 0.001). A p < 0.05 was considered statistically significant. AF, atrial fibrillation.