Document Detail

Catheter tip cooling during radiofrequency ablation of intra-atrial reentry: effects on power, temperature, and impedance.
MedLine Citation:
PMID:  12212698     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Cooling the catheter tip either passively with increased tip size or actively during radiofrequency catheter ablation (RFCA) has been shown in canine thigh preparations to create larger lesions than standard catheter tips, yielding a theoretical advantage for improving the outcome of RFCA for intra-atrial reentrant tachycardia (IART). METHODS AND RESULTS: The pediatric RFCA database at the Medical University of South Carolina was reviewed for RFCA of IART in patients with structural heart disease. From a total of 31 patients who underwent procedures during the study period, 8 patients in whom ablation with conventional ablation techniques failed and who went on to passive cooling with an 8-mm tip catheter or active cooling with an internally cooled-tip catheter were studied. Power delivery was greater but temperature and impedance were lower during cooled ablation than during conventional ablation. Passive cooling was associated with higher power than active cooling. These changes in RF biophysical characteristics were associated with successful elimination of 11 of 13 IART circuits in 7 of 8 patients. CONCLUSION: Cooling during RF ablation of atrial tachycardia clearly yielded greater power delivery in vivo and was associated with success.
Andrew D Blaufox; Mohamed T Numan; Preecha Laohakunakorn; Barbara Knick; Thomas Paul; J Philip Saul
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of cardiovascular electrophysiology     Volume:  13     ISSN:  1045-3873     ISO Abbreviation:  J. Cardiovasc. Electrophysiol.     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-09-05     Completed Date:  2003-01-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9010756     Medline TA:  J Cardiovasc Electrophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  783-7     Citation Subset:  IM    
Children's Heart Program of South Carolina, Medical University of South Carolina, Charleston 29425, USA.
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MeSH Terms
Catheter Ablation / instrumentation*
Cold Temperature*
Electric Impedance
Electrophysiologic Techniques, Cardiac
Heart Atria / pathology,  surgery
Heart Conduction System / pathology,  surgery
Heart Defects, Congenital / surgery
South Carolina
Tachycardia, Atrioventricular Nodal Reentry / surgery*
Treatment Outcome

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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