Abstract
Recent experimental studies show that the restitution curve of cardiac tissue can have a negative slope. We study how the negative slope of the restitution curve can influence basic processes in excitable media, such as periodic forcing of an excitable cell, circulation of a pulse in a ring, and spiral wave rotation in two dimensions. We show that negatively sloped restitution curve can result in instabilities if the slope of the restitution curve is steeper than - 1 and report different manifestations of this instability.
Original language | English |
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Pages (from-to) | 800-806 |
Number of pages | 7 |
Journal | Chaos |
Volume | 12 |
Issue number | 3 |
DOIs | |
State | Published - Sep 2002 |