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Acute and long-term outcome of cryoablation therapy of typical atrioventricular nodal reentrant tachycardia.

AbstractAIMS:
The purpose of this study was to evaluate the safety and efficacy of cryoablation in a large series of patients with typical (slow-fast) atrioventricular nodal reentrant tachycardia (AVNRT).
METHODS AND RESULTS:
Between 2003 and 2007, 312 patients with typical AVNRT--median age of 53 years (range 10-92), 200 women (64%)--underwent cryoablation, using exclusively a 6 mm tip catheter tip. Acute success was achieved in 309 of 312 patients (99%). The overall recurrence rate was 18 of 309 (5.8%) during a mean follow-up of 673 +/- 381 days. Sixteen of these patients (89%) were successfully reablated. The recurrence rate was 9% in patients with residual dual atrioventricular (AV) nodal pathway post-ablation compared with 4% in those with complete elimination of slow pathway conduction (P = 0.05). No patient developed permanent AV block.
CONCLUSION:
Cryoablation of AVNRT can be achieved with a high acute success rate and a reasonable recurrence rate at long-term follow-up. Complete abolition of slow pathway conduction seems to predict better late outcome.
AuthorsHamid Bastani, Jonas Schwieler, Per Insulander, Fariborz Tabrizi, Frieder Braunschweig, Göran Kennebäck, Nikola Drca, Bita Sadigh, Mats Jensen-Urstad
JournalEuropace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology (Europace) Vol. 11 Issue 8 Pg. 1077-82 (Aug 2009) ISSN: 1532-2092 [Electronic] England
PMID19578176 (Publication Type: Clinical Trial, Journal Article, Research Support, Non-U.S. Gov't)
Topics
  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Child
  • Cryosurgery (statistics & numerical data)
  • Female
  • Humans
  • Incidence
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Postoperative Complications (epidemiology)
  • Risk Assessment
  • Risk Factors
  • Sweden (epidemiology)
  • Tachycardia, Atrioventricular Nodal Reentry (epidemiology, surgery)
  • Treatment Outcome
  • Young Adult

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