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Fig. 5 | BMC Systems Biology

Fig. 5

From: Period doubling cascades of limit cycles in cardiac action potential models as precursors to chaotic early Afterdepolarizations

Fig. 5

Period Doubling Route to Chaotic EADs of Model UP. Evolution of voltage trajectories of model UP as the channel conductance G K is increased along the period doubling cascade PD1, PD2, PD3,... A) Single period with G K =0.039155 mS/ cm2 and \(\protect \phantom {\dot {i}\!}G_{K} < G_{K_{1}}\). B) Double period with G K =0.039175 mS/ cm2 and \(\protect \phantom {\dot {i}\!}G_{K_{1}} < G_{K} < G_{K_{2}}\). C) Fourfold period with G K =0.039188 and \(\protect \phantom {\dot {i}\!}G_{K_{2}} < G_{K} < G_{K_{3}}\). D) Eightfold period with G K =0.039189 mS/ cm2 and \(G_{K_{3}} < G_{K} < G_{K_{4}}\). E) Chaotic motion of failed repolarization with G K =0.039205 mS/ cm2. F) Chaotic EADs behaviour with G K =0.039218 mS/ cm2

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