Follow-up
All three patients were followed up for at least 3 months after successful ablation. Surface ECGs were checked in a month after ablation to confirm that no clinically significant AV conduction block took place. If the patients complained of palpitation, they were informed to come back for further examination like tranesophageal atrial programmed pacing. Patients were also advised to go to the emergency room immediately whenever they suffered from symptoms related to SVT to record real-time surface ECGs. If the patient was confirmed to have recurrences, he/she was advised to undergo a repeat ablation procedure.