Title :
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
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 λc. 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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.574982
