Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cardiac Reentry Modeled by Spatiotemporal Chaos in a Coupled Map Lattice   Arrhythmias are potentially fatal disruptions to the normal heart rhythm, but
their underlying dynamics is still poorly understood. Theoretical modeling is
an important tool to fill this gap. Typical studies often employ detailed
multidimensional conductance-based models. We describe the cardiac muscle with
a three-dimensional map-based membrane potential model in lattices. Although
maps retain the biophysical behavior of cells and generate computationally
efficient tissue models, few studies have used them to understand cardiac
dynamics. Our study captures healthy and pathological behaviors with fewer
parameters and simpler equations than conductance models. We successfully
generalize results obtained previously with reaction-diffusion systems, showing
how chaotic properties result in reentry, a pathological propagation of stimuli
that evolves to arrhythmias with complex spatiotemporal features. The
bifurcation diagram of the single cell is very similar to that obtained in a
detailed conductance-based model. We find torsade de pointes, a clinical
manifestation of some types of tachycardia in the electrocardiogram, using a
generic sampling of the whole network during spiral waves. We also find a novel
type of dynamical pattern, with wavefronts composed of synchronized cardiac
plateaus and bursts. Our study provides the first in-depth look at the use of
map-based models to simulate complex cardiac dynamics.

20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat