TY - JOUR
T1 - FEM analysis of predicting electrode-myocardium contact from RF cardiac catheter ablation system impedance
AU - Cao, Hong
AU - Speidel, Michael A.
AU - Tsai, Jang Zern
AU - Van Lysel, Michael S.
AU - Vorperian, Vicken R.
AU - Webster, John G.
N1 - Funding Information:
Manuscript received June 6, 2001; revised January 10, 2002. This work was supported by the National Institutes of Health (NIH) under Grant HL 56143. Asterisk indicates corresponding author. H. Cao and J.-Z. Tsai are with the Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI 53706 USA. M. A. Speidel and M. S. Van Lysel are with the Department of Medical Physics, University of Wisconsin, Madison, WI 53706 USA. V. R. Vorperian is with the University of Wisconsin Hospital and Clinics, Madison, WI 53792 USA. *J. G. Webster is with the Department of Biomedical Engineering, University of Wisconsin, 1410 Engineering Drive, Madison, WI 53706 USA (e-mail: [email protected]). Publisher Item Identifier S 0018-9294(02)04840-1.
PY - 2002
Y1 - 2002
N2 - We use the finite element method (FEM) to model and analyze the resistance between the catherer tip electrode and the dispersive electrode during radio-frequency cardiac catherer ablation for the prediction of myocardium-electrode contact. We included deformation of the myocardial surface to achieve accurate modeling. For perpendicular catherer contact, we measured the side view of the myocardial deformation using X-ray projection imaging. We average the deformation contour from nine samples, and then incorporated the contour information into our FEM model. We measured the resistivity of the bovine myocardium using the four-electrode method, and then calculated the resistance change as the catherer penetrated into the myocardium. The FEM result of resistance versus catherer penetration depth matches well with our experimental data.
AB - We use the finite element method (FEM) to model and analyze the resistance between the catherer tip electrode and the dispersive electrode during radio-frequency cardiac catherer ablation for the prediction of myocardium-electrode contact. We included deformation of the myocardial surface to achieve accurate modeling. For perpendicular catherer contact, we measured the side view of the myocardial deformation using X-ray projection imaging. We average the deformation contour from nine samples, and then incorporated the contour information into our FEM model. We measured the resistivity of the bovine myocardium using the four-electrode method, and then calculated the resistance change as the catherer penetrated into the myocardium. The FEM result of resistance versus catherer penetration depth matches well with our experimental data.
KW - Ablation
KW - Cardiac ablation
KW - Contact
KW - Electrode
KW - Finite element method
KW - Impedance
KW - Myocardium
KW - Radio-frequency cardiac ablation
UR - http://www.scopus.com/inward/record.url?scp=0036090314&partnerID=8YFLogxK
U2 - 10.1109/TBME.2002.1001965
DO - 10.1109/TBME.2002.1001965
M3 - 期刊論文
C2 - 12046696
AN - SCOPUS:0036090314
SN - 0018-9294
VL - 49
SP - 520
EP - 526
JO - IEEE Transactions on Biomedical Engineering
JF - IEEE Transactions on Biomedical Engineering
IS - 6
ER -