Nonequilibrium ribbon model of twisted scroll waves.
We formulate a reduced model to analyze the motion of the core of a twisted scroll wave. The model is first shown to provide a simple description of the onset and nonlinear evolution of the helical state appearing in the sproing bifurcation of scroll waves. It then serves to examine the experimentally studied case of a medium with spatially varying excitability. The model shows the role of sproing in this more complex setting and highlights the differences between the convective and absolute sproing instabilities.
Echebarria
Blas
B
Departament de Física Aplicada, Universitat Politècnica de Catalunya, Doctor Marañón 44, E-08028 Barcelona, Spain.
Hakim
Vincent
V
Henry
Hervé
H
D004247:DNA / Q000737:chemistry; D008962:Models, Theoretical; D014693:Ventricular Fibrillation
D004247:DNA