Patients will be supplied with an Event Recorder for trans-telephonic rhythm transmission (telemetry) for 5 months after ablation, and will be asked to transmit their rhythm data every time they had symptoms compatible with arrhythmias; and at least once a week, even if they were asymptomatic. Holter monitoring will be performed at 6-month post-ablation. The arrhythmic episodes will be documented based on ECG, Holter data, Event Recorder data and/or implanted device data (when available).