Title :
Finite element analysis of temperature profiles in linear phased multi-electrode ablation
Author_Institution :
Therapy Res., Guidant Corp., St. Paul, MN, USA
fDate :
29 Oct-1 Nov 1998
Abstract :
Several finite element models have been used for simulating radio-frequency (RF) ablation of a one-tip electrode system. For atrial fibrillation (AF) ablation, a multi-electrode catheter is often used in order to create a uniform linear lesion. In this paper, a multi-electrode finite element model is used to analyze temperature profiles and lesion depths during phased linear AF ablation. Temperature profiles, lesion depth and lesion uniformity are found to be significantly influenced by various ablation parameters such as power delivery phase angle, blood flow rate, tissue and blood conductivity. The effects of these parameters on lesion size can be analyzed and compared in simulated power-controlled or temperature-controlled ablation procedures
Keywords :
bioelectric phenomena; biomedical electrodes; biothermics; cardiology; finite element analysis; patient treatment; physiological models; temperature distribution; atrial fibrillation; blood conductivity; blood flow rate; lesion depth; lesion size; lesion uniformity; linear phased multi-electrode ablation; multielectrode finite element model; one-tip electrode system; parameters effects; power delivery phase angle; temperature profiles; therapeutic technique; tissue conductivity; Atrial fibrillation; Blood flow; Catheters; Conductivity; Electrodes; Finite element methods; Lesions; Power system modeling; Radio frequency; Temperature;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.745888
