Key result
Echebarria-Karma modulation equation demonstrates spatiotemporal chaos in cardiac dynamics through an alternate mechanism.
Why the study?
Chaotic behavior in cardiac dynamics and its correlation with fatal arrhythmias have been widely investigated, but mechanisms of chaos in one-dimensional alternans modulation remain unclear.
This mathematical study demonstrates that chaotic behavior in cardiac dynamics may occur through a novel mechanism involving one-dimensional alternans modulation.
Reveals alternative chaos pathway in 1D cardiac alternans; extends theory but leaves open experimental validation and clinical relevance.
Instabilities in cardiac dynamics have been widely investigated in recent years. One facet of this work has studied chaotic behavior, especially possible correlations with fatal arrhythmias. Previously chaotic behavior was observed in various models, specifically in the breakup of spiral and scroll waves. In this paper we study cardiac dynamics and find spatiotemporal chaotic behavior through the Echebarria-Karma modulation equation for alternans in one dimension. Although extreme parameter values are required to produce chaos in this model, it seems significant mathematically that chaos may occur by a different mechanism from previous observations.
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Dai et al. (2010) studied Cardiac arrhythmias. Echebarria-Karma modulation equation was evaluated on Spatiotemporal chaotic behavior. The Echebarria-Karma modulation equation for alternans in one dimension demonstrated spatiotemporal chaotic behavior in cardiac dynamics, suggesting chaos may occur by a different mechanism.
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