Cardiac cells, action potential behaviors

APPLICATION Myocardial cell action potentials collected from a Langendorff setup of an isolated rabbit heart experiment have been fouttd to exhibit chaotic behavior. Two different cardiac cell action potential waveforms are illustrated in Fig. 18.10 correspotuling to ventricidar fibrillation (VF) in (a) and normal struts rhythm (NSR) in (b). The corresponding frequerKy spectrum is shown inFig. 18.11. VF certainly shows chaotic characteristics in Fig. 18.11a, whereas NSR shows distinct spectral lines in Fig. 18.11b, indicating the presence of deterministic components. Using the calculated correlation dimensions for the two different action potentials (VF = 5.629, NSR = 2.704), the embedding dimension is m = 6 for VF. The projections of the trajectories for VF in a three-... 

Differiiig Action Potential Behaviors among Cardiac Cells... 

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