FEM analysis of predicting electrode-myocardium contact from RF cardiac catheter ablation system impedance
| Autor: | V.R. Vorperian, Jang-Zern Tsai, M. S. Van Lysel, Hong Cao, John G. Webster, Michael A. Speidel |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Radio Waves medicine.medical_treatment Myocardium Finite Element Analysis Biomedical Engineering Models Cardiovascular Catheter ablation Deformation (meteorology) Cardiac Ablation Ablation Finite element method Elasticity Catheter Electrode medicine Catheter Ablation Electric Impedance Image Processing Computer-Assisted Animals Cattle Stress Mechanical Penetration depth Electrodes Biomedical engineering |
| Zdroj: | IEEE transactions on bio-medical engineering. 49(6) |
| ISSN: | 0018-9294 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|