Document Detail

FEM analysis of predicting electrode-myocardium contact from RF cardiac catheter ablation system impedance.
MedLine Citation:
PMID:  12046696     Owner:  NLM     Status:  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.
Hong Cao; Michael A Speidel; Jang-Zern Tsai; Michael S Van Lysel; Vicken R Vorperian; John G Webster
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  IEEE transactions on bio-medical engineering     Volume:  49     ISSN:  0018-9294     ISO Abbreviation:  IEEE Trans Biomed Eng     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-06-05     Completed Date:  2002-07-19     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0012737     Medline TA:  IEEE Trans Biomed Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  520-6     Citation Subset:  IM    
Department of Electrical and Computer Engineering, University of Wisconsin, Madison 53706, USA.
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MeSH Terms
Catheter Ablation / instrumentation,  methods*
Electric Impedance
Finite Element Analysis*
Image Processing, Computer-Assisted
Models, Cardiovascular*
Myocardium / pathology*
Radio Waves
Stress, Mechanical
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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