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The bidomain and monodomain equations are well established as the standard set of equations for the simulation of cardiac electrophysiological behavior. However, the computational cost of detailed bidomain/monodomain simulations limits their applicability in scenarios where a large number of simulations needs to be performed (e.g., parameter estimation). In this study, we present a graph-based method, which relies on point-to-point path finding to estimate activation times for single points in cardiac tissue with minimal computational costs. To validate our approach, activation times are compared to monodomain simulation results for an anatomically based rabbit ventricular model, incorporating realistic fiber orientation and conduction heterogeneities. Differences in activation times between the graph-based method and monodomain results are less than 10% of the total activation time, and computational performance is orders of magnitude faster with the proposed method when calculating activation times at single points. These results suggest that the graph-based method is well suited for estimating activation times when the need for fast performance justifies a limited loss of accuracy.

Original publication

DOI

10.1109/TBME.2012.2193398

Type

Journal article

Journal

IEEE Trans Biomed Eng

Publication Date

06/2012

Volume

59

Pages

1739 - 1748

Keywords

Action Potentials, Algorithms, Animals, Computer Simulation, Heart Conduction System, Models, Cardiovascular, Numerical Analysis, Computer-Assisted, Rabbits, Ventricular Function, Left