Wave-train-induced termination of weakly anchored vortices in excitable media

被引：54

作者：

Pumir, Alain ^{[1
,2
,3
,4
]}

Sinha, Sitabhra ^{[5
]}

Sridhar, S. ^{[5
]}

Argentina, Mederic ^{[3
,4
]}

Hoerning, Marcel ^{[6
]}

Filippi, Simonetta ^{[7
]}

Cherubini, Christian ^{[7
]}

Luther, Stefan ^{[8
]}

Krinsky, Valentin ^{[8
,9
,10
]}

机构：

[1] ENS Lyon, Phys Lab, F-69007 Lyon, France

[2] CNRS, F-69007 Lyon, France

[3] Univ Nice, Lab JA Dieudonne, F-06108 Nice, France

[4] CNRS, F-06108 Nice, France

[5] Inst Math Sci, Madras 600113, Tamil Nadu, India

[6] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[7] Nonlinear Phys & Math Modeling Lab, I-00128 Rome, Italy

[8] MPI Dynam & Self Org, D-37077 Gottingen, Germany

[9] Inst Non Lineaire Nice, F-06560 Valbonne, France

[10] CNRS, F-06560 Valbonne, France

来源：

PHYSICAL REVIEW E | 2010年 / 81卷 / 01期

关键词：

SPIRAL WAVES; MODEL; TURBULENCE; DYNAMICS;

D O I：

10.1103/PhysRevE.81.010901

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A free vortex in excitable media can be displaced and removed by a wave train. However, simple physical arguments suggest that vortices anchored to large inexcitable obstacles cannot be removed similarly. We show that unpinning of vortices attached to obstacles smaller than the core radius of the free vortex is possible through pacing. The wave-train frequency necessary for unpinning increases with the obstacle size and we present a geometric explanation of this dependence. Our model-independent results suggest that decreasing excitability of the medium can facilitate pacing-induced removal of vortices in cardiac tissue.

引用

页数：4

共 32 条

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