Palpitations after Cryomodification for AVNRT

Background: AV nodal re-entrant tachycardia (AVNRT) is a common substrate for supraventricular tachycardia (SVT) in children and young adults. Some patients will return after ablation with palpitations. Follow-up studies in cardiology have focused on recurrence of documented arrhythmia, but not all patients with palpitations will have had a recurrence of their SVT substrate. For many families, palpitations after ablation create worry and influence patient experience. In addition, they may trigger clinical testing to determine if there has …