A free vortex in excitable media can be displaced and removed by a wave train. However, simple physicalarguments suggest that vortices anchored to large inexcitable obstacles cannot be removed similarly. We showthat unpinning of vortices attached to obstacles smaller than the core radius of the free vortex is possiblethrough pacing. The wave-train frequency necessary for unpinning increases with the obstacle size and wepresent a geometric explanation of this dependence. Our model-independent results suggest that decreasingexcitability of the medium can facilitate pacing-induced removal of vortices in cardiac tissue.
Wave-train-induced termination of weakly anchored vortices in excitable media
FILIPPI S;CHERUBINI C;
2010-01-01
Abstract
A free vortex in excitable media can be displaced and removed by a wave train. However, simple physicalarguments suggest that vortices anchored to large inexcitable obstacles cannot be removed similarly. We showthat unpinning of vortices attached to obstacles smaller than the core radius of the free vortex is possiblethrough pacing. The wave-train frequency necessary for unpinning increases with the obstacle size and wepresent a geometric explanation of this dependence. Our model-independent results suggest that decreasingexcitability of the medium can facilitate pacing-induced removal of vortices in cardiac tissue.File in questo prodotto:
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