Superexcitability induced spiral breakup in excitable systems
Anno: 1996
Autori: Giaquinta A., Boccaletti S., Arecchi F.T.
Affiliazione autori: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy
Abstract: We introduce a 2D coupled map lattice model which, besides simulating the two variable FitzHugh-Nagumo reaction diffusion mechanism, accounts also for a superexcitable period. Superexcitability in the threshold dynamics of excitable media has been recently observed in experiments on cardiac tissues. By this model, we can reproduce the transition from normal cardiac behavior toward fibrillating processes in a 2D assembly of cardiac cells. The role of superexcitability results in producing two states of wave propagation and a spiral breakup mechanism in qualitative agreement with the experimental evidence of coarse and fine fibrillation in human hearts.
Giornale/Rivista: INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
Volume: 6 (9) Da Pagina: 1753 A: 1759
Parole chiavi: CARDIAC TISSUE; DYNAMICS; MODEL; PROPAGATION; ACTIVATIONDOI: 10.1142/S0218127496001089Citazioni: 7dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui