Termination of Reentry in an Inhomogeneous Ring of Model Cardiac Cells

Details Termination of Reentry in an Inhomogeneous Ring of Model Cardiac Cells Termination of Reentry in an Inhomogeneous Ring of Model Cardiac Cells

2002-07-31

arxiv.org/abs/nlin/0207061v2

Phys Rev E 66, 061903 (2002)

Nonlinear Sciences

Chaotic Dynamics

8 pages, 2-column LaTex (7 eps figures included); v2 includes additional results and figures as in published version

Scientific paper

10.1103/PhysRevE.66.061903

Reentrant waves propagating in a ring or annulus of excitable media model is the basic mechanism underlying a major class of irregular cardiac rhythms known as anatomical reentry. Such reentrant waves are terminated by rapid electrical stimulation (pacing) from an implantable device. Because the mechanisms of such termination are poorly understood, we study pacing of anatomical reentry in a one-dimensional ring of model cardiac cells. For realistic off-circuit pacing, our model-independent results suggest that circuit inhomogeneities, and the electrophysiological dynamical changes they introduce, may be essential for terminating reentry in some cases.

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