Follow-up and data collection
All patients were scheduled for follow-up visit three months after the procedure and every six months with clinical examination, AF/AT recurrences were documented either by electrocardiogram or Holter recordings. Patients with recurrences after the blanking period of three months after procedure were considered for repeated ablation. We collected clinical, electrocardiographic, echocardiographic, and procedural data from medical files, or from patients’ cardiologist if they were no longer followed in our centers.