AI Article Synopsis
- The research demonstrates that a feedback loop involving sodium current inactivation influences the speed of wave-front ramp-up, leading to a saddle-node bifurcation that produces bistable planar and spiral waves in excitable media.
- Different stimulation methods can initiate either slow or fast waves, indicating varied wave dynamics.
- These variations in spiral wave behavior may contribute to the complex dynamics observed in cardiac arrhythmias and certain neurological disorders.
Article Abstract
We show that a positive feedback loop between sodium current inactivation and wave-front ramp-up speed causes a saddle-node bifurcation to result in bistable planar and spiral waves in electrically excitable media, in which both slow and fast waves are triggered by different stimulation protocols. Moreover, the two types of spiral wave conduction may interact to give rise to more complex spiral wave dynamics. The transitions between different spiral wave behaviors via saddle-node bifurcation can be a candidate mechanism for transitions widely seen in cardiac arrhythmias and neural diseases.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11338078 | PMC |
| http://dx.doi.org/10.1103/PhysRevE.108.064405 | DOI Listing |
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