title: From local to global spatiotemporal chaos in a cardiac tissue model.
abstract: Two kinds of chaos can occur in cardiac tissue, chaotic meander of a single intact spiral wave and chaotic spiral wave breakup. We studied these behaviors in a model of two-dimensional cardiac tissue based on the Luo-Rudy I action potential model. In the chaotic meander regime, chaos is spatially localized to the core of the spiral wave. When persistent spiral wave breakup occurs, there is a transition from local to global spatiotemporal chaos.
authors.affiliation: Department of Medicine (Cardiology), University of California at Los Angeles, Los Angeles, California 90095, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Qu
authors.forename: J N
authors.initials: JN
authors.lastname: Weiss
authors.forename: A
authors.initials: A
authors.lastname: Garfinkel
mesh_terms: D000200:Action Potentials; D000818:Animals; D055592:Biophysical Phenomena; D001703:Biophysics; D004594:Electrophysiology; D006321:Heart / Q000502:physiology*; D008955:Models, Cardiovascular; D017711:Nonlinear Dynamics