Ventricular fibrillation in dogs does not exhibit a low-dimensional attractor, suggesting it behaves more like a nonchaotic random signal or a complex nonlinear deterministic system.
Challenges low-dimensional chaos models of VF; leaves open whether stochastic or high-dimensional dynamics predominate in humans.
Ventricular fibrillation is examined to determine whether it is an instance of deterministic chaos. Surface ECGs from dogs in fibrillation were used to generate a state space representation of fibrillation. Our analysis failed to identify a low-dimensional attractor that could be associated with fibrillation. The results suggest that fibrillation is similar to a nonchaotic random signal. We note, however, that such random-looking but nonchaotic behavior can also be generated by a nonlinear deterministic system.
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Kaplan et al. (1990) studied this question.
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