Author, as appears in the article.: Skardal, P.S., Restrepo, J.G.
Department: Enginyeria Informàtica i Matemàtiques
e-ISSN: 1089-7682
Abstract: The spatiotemporal dynamics of cardiac tissue is an active area of research for biologists, physicists, and mathematicians. Of particular interest is the study of period-doubling bifurcations and chaos due to their link with cardiac arrhythmogenesis. In this paper, we study the spatiotemporal dynamics of a recently developed model for calcium-driven alternans in a one dimensional cable of tissue. In particular, we observe in the cable coexistence of regions with chaotic and multi-periodic dynamics over wide ranges of parameters. We study these dynamics using global and local Lyapunov exponents and spatial trajectory correlations. Interestingly, near nodes-or phase reversals-low-periodic dynamics prevail, while away from the nodes, the dynamics tend to be higher-periodic and eventually chaotic. Finally, we show that similar coexisting multi-periodic and chaotic dynamics can also be observed in a detailed ionic model.
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 1054-1500
Journal volume: 24
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: http://scitation.aip.org/content/aip/journal/chaos/24/4/10.1063/1.4901728
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1063/1.4901728
Entity: Universitat Rovira i Virgili.
Journal publication year: 2014
Repositori URV