Phys. Rev. Lett. 78, 1387–1390 (1997)Spatiotemporal Chaos in a Simulated Ring of Cardiac CellsReceived 11 September 1996; published in the issue dated 17 February 1997 We recently presented evidence that cardiac fibrillation is a form of spatiotemporal chaos arising via a quasiperiodic transition. To investigate the origin of this quasiperiodicity, we studied reentrant excitation in a ring of cardiac cells. We modified the Beeler-Reuter model, changing the action potential duration (APD) restitution so that it agreed qualitatively with experimental studies. We found that chaos could occur by reentrant excitation, in a transition from quasiperiodicity to spatiotemporal chaos. This occurred only when the APD restitution curve was nonmonotonic. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.1387
DOI:
10.1103/PhysRevLett.78.1387
PACS:
87.22.As, 05.45.+b, 87.10.+e
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