Is fibrillation chaos?
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.
Kaplan
D T
DT
Division of Applied Sciences, Harvard University, Cambridge, Mass.
Cohen
R J
RJ
D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D008433:Mathematics; D014693:Ventricular Fibrillation / Q000503:physiopathology