Vortex wave stability in homogeneous excitable media: simulations on a randomized discrete lattice

Author

Feldman, A. ; Yin, J.Z. ; Saxberg, Bo E H ; Chernyak, Y.B. ; Cohen, R.J.

Author_Institution

Dept. of Phys., Harvard Univ., Cambridge, MA, USA

Volume

1

fYear

1995

fDate

20-25 Sep 1995

Firstpage

25

Abstract

The authors studied the stability of vortex waves in 2D homogeneous excitable media using a cellular automaton model on a randomized square lattice. The authors performed two different sets of simulations using both square and circular regions for the interaction neighborhood. In both cases, the spontaneous breaking of the vortex waves was eliminated by randomizing the positions of the lattice nodes beyond a minimum length scale λ_c. This scale was substantially smaller for the circular interaction region

Keywords

cellular automata; electrocardiography; physiological models; vortices; 2D homogeneous excitable media; cardiac electrophysiology; cellular automaton model; circular region; heart; interaction neighborhood; lattice nodes; minimum length scale; randomized discrete lattice; spontaneous breaking; square region; ventricular fibrillation; ventricular tachycardia; Anisotropic magnetoresistance; Automata; Fractionation; Geometry; Lattices; Physics; Random media; Random variables; Solid modeling; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-2475-7

Type

conf

DOI

10.1109/IEMBS.1995.574982

Filename

574982