三室椭圆形心室内偏心放置导管的电导容积模型

Conductance volumetric model of an eccentrically positioned catheter within a three-compartment ellipsoidal ventricle.

作者信息

Kun S, Peura R A

机构信息

Worcester Polytechnic Institute, Biomedical Engineering Department, MA 01609.

出版信息

IEEE Trans Biomed Eng. 1993 Jun;40(6):589-92. doi: 10.1109/10.237679.

DOI:10.1109/10.237679

PMID:8262541

Abstract

This paper presents a mathematical model of the electric field generated and resistance measured by a conductance catheter within a three-compartment ellipsoidal approximation of a cardiac ventricle. The model is based on a novel combination of analytical and numerical techniques. The numerical component of the model predicts displacement of the catheter along the central longitudinal ventricular axis, as well as eccentric positions off that axis. The analytical component of the model enables interactive definition of model parameters during simulation. This versatile combination enables performance of validation studies that include simulations of various catheter movements within a ventricle of changing geometry. The results of our simulation studies agree with the results of previous investigators studying ex-vivo systems.

摘要

本文提出了一种数学模型，用于描述在心室的三室椭圆近似模型中，电导导管所产生的电场以及所测量的电阻。该模型基于解析技术和数值技术的新颖组合。模型的数值部分可预测导管沿心室中央纵向轴的位移，以及偏离该轴的偏心位置。模型的解析部分能够在模拟过程中交互式地定义模型参数。这种多功能的组合使得验证研究得以开展，包括模拟在几何形状不断变化的心室内各种导管的运动。我们模拟研究的结果与先前研究离体系统的研究者的结果一致。