Author, as appears in the article.: | Skardal, P.S., Restrepo, J.G.
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Journal publication year: | 2014
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ISSN: | 1054-1500
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e-ISSN: | 1089-7682
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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.
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Article's DOI: | 10.1063/1.4901728
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Link to the original source: | http://scitation.aip.org/content/aip/journal/chaos/24/4/10.1063/1.4901728
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Papper version: | info:eu-repo/semantics/publishedVersion
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licence for use: | https://creativecommons.org/licenses/by/3.0/es/
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Department: | Enginyeria Informàtica i Matemàtiques
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Licence document URL: | https://repositori.urv.cat/ca/proteccio-de-dades/
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Entity: | Universitat Rovira i Virgili.
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Journal volume: | 24
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