NDLI: RF and microwave ablation for the treatment of ventricular tachycardia

Content Provider	IEEE Xplore Digital Library
Author	Rosenbaum, R.M. Greenspon, A.J. Hsu, S. Walinsky, P. Rosen, A.
Copyright Year	1993
Description	Author affiliation: Jefferson Med. Coll., Philadelphia, PA, USA (Rosenbaum, R.M.; Greenspon, A.J.; Hsu, S.; Walinsky, P.; Rosen, A.)
Abstract	Current RF ablation technology is limited by small lesion size. In order to enhance the size of RF-induced LV (left ventricular) endocardial lesions, the effects of an enlarged distal electrode tip and increased RF power on lesion volume were evaluated. Steerable electrode catheters with distal electrode tips of 4-12 mm were studied in anesthetized dogs at power settings of 20-100 W. Temperature was continuously monitored from a thermistor located at the tip of the catheter. RF energy (500 kHz, unmodulated) was applied between the tip of the catheter and a large skin electrode at four separate LV sites in each animal. Microwave ablation catheters with whip and helical antenna configurations were also tested. RF lesion volume increased with increasing delivered power and enlarged tip size. Average tip temperature correlated with measured lesion volume (r=0.66). Microwave catheters produced volume heating but the magnitude of heating was less than that observed for RF catheters. Catheter ablation of ventricular tachycardia may be enhanced by this technology.
Starting Page	1155
Ending Page	1158
File Size	426826
Page Count	4
File Format	PDF
ISBN	0780312090
ISSN	0149645X
DOI	10.1109/MWSYM.1993.277076
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1993-06-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Catheters Lesions Electrodes Electromagnetic heating Temperature measurement Dogs Temperature sensors Thermistors Skin
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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