SUCCESSFUL IRRIGATED-TIP CATHETER ABLATION OF ATRIAL-FLUTTER RESISTANT TO CONVENTIONAL RADIOFREQUENCY ABLATION

Citation
P. Jais et al., SUCCESSFUL IRRIGATED-TIP CATHETER ABLATION OF ATRIAL-FLUTTER RESISTANT TO CONVENTIONAL RADIOFREQUENCY ABLATION, Circulation, 98(9), 1998, pp. 835-838
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Peripheal Vascular Diseas",Hematology,"Cardiac & Cardiovascular System
Journal title
ISSN journal
0009-7322
Volume
98
Issue
9
Year of publication
1998
Pages
835 - 838
Database
ISI
SICI code
0009-7322(1998)98:9<835:SICAOA>2.0.ZU;2-Y
Abstract
Background-Catheter ablation of typical right atrial flutter is now wi dely performed. The best end point has been demonstrated to be bidirec tional isthmus block. We investigated the use of irrigated-tip cathete rs in a small subset of patients who failed isthmus ablation with conv entional radiofrequency (RF) ablation, Methods and Results-Of 170 pati ents referred for ablation of common atrial flutter, conventional abla tion of the cavotricuspid isthmus with >21 applications failed to crea te a bidirectional block in 13 (7.6%), An irrigated-tip catheter ablat ion was performed on identified gaps in the ablation line according to a protocol found to be safe in animals: a moderate flow rate of 17 mL /min and temperature-controlled (target, 50 degrees C) RF delivery wit h a power limit of 50 W, Bidirectional isthmus block was achieved in 1 2 patients by use of a mean delivered power of 40+/-6 W with a single application in 6 patients and 2 to 6 applications in the other 6, No s ide effects occurred during or after the procedure. Conclusions-Irriga ted-tip catheter ablation is safe and effective for achieving cavotric uspid isthmus block when conventional RF energy has failed.