FEM analysis of predicting electrode-myocardium contact from RF cardiac catheter ablation system impedance

Hong Cao, Michael A. Speidel, Jang Zern Tsai, Michael S. Van Lysel, Vicken R. Vorperian, John G. Webster

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)520-526
Number of pages7
JournalIEEE Transactions on Biomedical Engineering
Volume49
Issue number6
DOIs
StatePublished - 2002

Keywords

  • Ablation
  • Cardiac ablation
  • Contact
  • Electrode
  • Finite element method
  • Impedance
  • Myocardium
  • Radio-frequency cardiac ablation

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