Comparison of Two Formulations for Computing Body Surface Potential Maps
2023 Computing in Cardiology (CinC)(2024)
摘要
In order to establish a link between the activation map and the body surface
signals, we want to compute body potentials from activation maps and a
frontlike approximation of the activation of the heart. To do so, two
formulations that map the extracardiac potential from the transmembrane voltage
naturally emerge from the bidomain model. Either the extracellular/extracardiac
potential solves a Laplace equation with discontinuous conductivity coefficient
and ionic current as a source (Source Formulation F1); or the quasi-stationary
electrical balance between the intra- and extracellular fields (Balance
Formulation F2). In this work, we compare F1 and F2, to determine which
formulation is the most relevant to use. We compute reference activation map
ψ , transmembrane voltage v and body surface map u with a bidomain 2D
code. We design two alternative shapes ṽ for a frontlike
approximation of v . Afterwards, two extracellular / extracardiac potentials
are computed from the activation time ψ and ṽ , using the two
different formulations. Then the extracardiac potentials solutions of F1 and F2
are compared respectively to the solution of the bidomain u . Results show
that the Balance Formulation F2 is robust to the input data (ṽ and
ψ). On the contrary, the Source Formulation F1 is very unstable and
generates very large errors on the body surface map.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要