Title :
Temperature distribution under cooled electrodes during radiofrequency catheter ablation
Author :
Panescu, Dorin ; Fleischman, Sidney D. ; Whayne, James G. ; Swanson, David K.
Author_Institution :
EP Technol. Inc., Sunnyvale, CA, USA
Abstract :
Larger lesions were created when the electrode of an RF ablation system was actively cooled below blood temperature. To keep the maximal tissue temperature at about 90°C, significantly more RF power had to be delivered. Because the hottest tissue region moved farther from the electrode surface, it was more difficult to predict the adequate tissue heating. Therefore, the probability of overheating the tissue and producing micro-explosions increased
Keywords :
bioelectric phenomena; cooling; finite element analysis; hyperthermia; radiofrequency heating; temperature distribution; 3-D finite element model; 90 C; adequate tissue heating; blood temperature; cooled electrodes; electric heating; hottest tissue region; larger lesions; maximal tissue temperature; micro-explosions; radiofrequency catheter ablation; therapeutic technique; tissue overheating; Blood; Boundary conditions; Cardiac tissue; Catheters; Electrodes; Iron; Lesions; Radio frequency; Temperature distribution; Thermistors;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.575119
