Two-variable model equations of cardiac tissue demonstrate that an oscillatory pulse instability causes action potential duration alternation in 1D and spontaneous spiral breakup in 2D.
Action potential propagation in cardiac tissue
Two-variable model equations
Spontaneous spiral breakup and spatially disorganized electrical wave activity
Two-variable model equations that capture some essential dynamical features of quantitative electrophysiological models of cardiac tissue are introduced. In one dimension, these equations naturally reproduce an experimentally observed oscillatory pulse instability that causes an alternation in action potential duration. In two dimensions, spontaneous spiral breakup leading to a spatially disorganized electrical wave activity is shown to occur as a direct consequence of this instability.
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Alain Karma
Electrophysiology
Physical Review Letters
Northeastern University
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Alain Karma (Mon,) conducted a other in Action potential propagation in cardiac tissue. Two-variable model equations was evaluated on Spontaneous spiral breakup and spatially disorganized electrical wave activity. Two-variable model equations of cardiac tissue demonstrate that an oscillatory pulse instability causes action potential duration alternation in 1D and spontaneous spiral breakup in 2D.
synapsesocial.com/papers/6a0863879a6c4ba6e6109896 — DOI: https://doi.org/10.1103/physrevlett.71.1103
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