期刊
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
卷 49, 期 6, 页码 520-526出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TBME.2002.1001965
关键词
ablation; cardiac ablation; contact; electrode; finite-element method; impedance; myocardium; radio-frequency cardiac ablation
资金
- NHLBI NIH HHS [HL 56143] Funding Source: Medline
We used the finite-element method (FEM) to model and analyze the resistance between the catheter tip electrode and the dispersive electrode during radio-frequency cardiac catheter ablation for the prediction of myocardium-electrode contact. We included deformation of the myocardial surface to achieve accurate modeling. For perpendicular catheter contact, we measured the side view of myocardial deformation using X-ray projection imaging. We averaged 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 catheter penetrated into the myocardium. The FEM result of resistance versus catheter penetration depth matches well with our experimental data.
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