Lesion dimensions during temperature-controlled radiofrequency catheter ablation of left ventricular porcine myocardium: Impact of ablation site, electrode size, and

BACKGROUND: It is important to increase lesion size to improve the success rate for radiofrequency ablation of ischemic ventricular tachycardia. This study of radiofrequency ablation, with adjustment of power to approach a preset target temperature, ie, temperature-controlled ablation, explores the...

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Published in:Circulation (New York, N.Y.) N.Y.), 1999-01, Vol.99 (2), p.319
Main Authors: Helen Hogh Petersen, Chen, Xu, Pietersen, Adrian, Jesper Hastrup Svendsen, Haunso, Stig
Format: Article
Language:English
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Summary:BACKGROUND: It is important to increase lesion size to improve the success rate for radiofrequency ablation of ischemic ventricular tachycardia. This study of radiofrequency ablation, with adjustment of power to approach a preset target temperature, ie, temperature-controlled ablation, explores the effect of catheter-tip length, ablation site, and convective cooling on lesion dimensions. METHODS AND RESULTS: In vitro strips of porcine left ventricular myocardium during different levels of convective cooling and in vivo pig hearts at 2 or 3 left ventricular sites were ablated with 2- to 12-mm-tip catheters. We found increased lesion volume for increased catheter-tip length
ISSN:0009-7322
1524-4539