Show simple item record

dc.contributor.authorFoulkes, A. J.en_GB
dc.contributor.authorBarkley, D.en_GB
dc.contributor.authorBiktashev, V. N.en_GB
dc.contributor.authorBiktasheva, I. V.en_GB
dc.date.accessioned2012-09-28T18:21:50Zen_GB
dc.date.accessioned2013-03-20T12:43:07Z
dc.date.issued2010en_GB
dc.description.abstractRotating spiral and scroll waves (vortices) are investigated in the FitzHugh-Nagumo model of excitable media. The focus is on a parameter region in which there exists bistability between alternative stable vortices with distinct periods. Response functions are used to predict the filament tension of the alternative scrolls and it is shown that the slow-period scroll has negative filament tension, while the filament tension of the fast-period scroll changes sign within a hysteresis loop. The predictions are confirmed by direct simulations. Further investigations show that the slow-period scrolls display features similar to delayed after-depolarization and tend to develop into turbulence similar to ventricular fibrillation (VF). Scrolls with positive filament tension collapse or stabilize, similar to monomorphic ventricular tachycardia (VT). Perturbations, such as boundary interaction or shock stimulus, can convert the vortex with negative filament tension into the vortex with positive filament tension. This may correspond to transition from VF to VT unrelated to pinning.en_GB
dc.identifier.citationVol. 20 (4) article 043136en_GB
dc.identifier.doi10.1063/1.3517079en_GB
dc.identifier.urihttp://hdl.handle.net/10036/3814en_GB
dc.language.isoengen_GB
dc.publisherAmerican Institute of Physicsen_GB
dc.relation.urlhttp://dx.doi.org/10.1063/1.3517079en_GB
dc.subjectBiomechanicsen_GB
dc.subjectComputer Simulationen_GB
dc.subjectElectrocardiographyen_GB
dc.subjectHearten_GB
dc.subjectHumansen_GB
dc.subjectModels, Cardiovascularen_GB
dc.subjectNumerical Analysis, Computer-Assisteden_GB
dc.subjectReproducibility of Resultsen_GB
dc.titleAlternative stable scroll waves and conversion of autowave turbulenceen_GB
dc.date.available2012-09-28T18:21:50Zen_GB
dc.date.available2013-03-20T12:43:07Z
exeter.place-of-publicationUnited Statesen_GB
dc.identifier.journalChaosen_GB


Files in this item

This item appears in the following Collection(s)

Show simple item record