FEM analysis of predicting electrode-myocardium contact from RF cardiac catheter ablation system impedance
FEM analysis of predicting electrode-myocardium contact from RF cardiac catheter ablation system impedance
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DOI：
10.1109/tbme.2002.1001965
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发表时间：
2002-06-01
影响因子：
4.6
通讯作者：
Webster, JG
中科院分区：
文献类型：
--
作者：
Cao, H;Speidel, MA;Webster, JG
我们使用有限元法（FEM）对射频心导管消融过程中导管尖端电极和分散电极之间的电阻进行建模和分析，以预测心肌-电极接触。我们包括心肌表面的变形以实现准确的建模。对于垂直导管接触，我们使用 X 射线投影成像测量心肌变形的侧视图。我们对九个样本的变形轮廓进行平均，然后将轮廓信息合并到我们的有限元模型中。我们采用四电极法测量牛心肌的电阻率，然后计算导管刺入心肌时的电阻变化。阻力与导管穿透深度的有限元分析结果与我们的实验数据非常吻合。
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.