Long-term outcome following ablation of atrial flutter occurring late after atrial septal defect repair

Andrew W. Teh, Caroline Medi, Geoffrey Lee, Raphael Rosso, Paul B. Sparks, Joseph B. Morton, Peter M. Kistler, Karen Halloran, Jitendra K. Vohra, Jonathan M. Kalman

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Aims: In patients with surgical atrial septal defect (ASD) repair, late atrial flutters (AFLs), including cavotricuspid isthmus (CTI)-dependent and non-CTI-dependent scar-related flutter (AFL), are common. Radiofrequency ablation (RFA) of these arrhythmias has a high acute success rate. We aimed to characterize the long-term freedom from atrial arrhythmias in this population. Methods: Twenty consecutive patients undergoing RFA for AFL late after ASD repair were included. Electrophysiological assessment included multipolar activation, entrainment, and electroanatomic mapping. Clinical, electrocardiograph, and Holter monitoring follow-up was conducted every 6 months. Results: Mean age was 53 ± 13 years. Time from surgical repair to RFA was 29 ± 15 years. All patients had CTI-dependent AFL (20/20). There were 1.6 ± 0.7 arrhythmias per patient; other arrhythmias included non-CTI-dependent AFL (14), focal atrial tachycardia (two), and atrioventricular nodal reentry tachycardia (two). Acute success was obtained in 100%. Five patients with recurrent AFL (three CTI dependent, two non-CTI dependent) at 13 ± 8 months had successful repeat RFA. At 3.2 ± 1.6 years follow-up since the last procedure, 90% of patients with successful RFA for AFL remained free of their clinical arrhythmia. However, 30% of the original 20 patients had documented atrial fibrillation (AF) 2.1 ± 1.6 years after the last procedure; five (25%) required AF intervention. One stroke (5%) occurred in the context of late AF. Conclusion: RFA of AFL occurring late after surgical ASD repair has a low long-term risk of recurrence, although 25% of patients required two procedures. However, there is a high late incidence of AF (30%), with an additional 25% of patients requiring intervention for AF.

Original languageEnglish
Pages (from-to)431-435
Number of pages5
JournalPACE - Pacing and Clinical Electrophysiology
Volume34
Issue number4
DOIs
StatePublished - Apr 2011
Externally publishedYes

Keywords

  • Ablation
  • Atrial fibrillation
  • Atrial flutter
  • Atrial septal defect

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