Regensburg 2025 – scientific programme
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BP: Fachverband Biologische Physik
BP 10: Focus Session: Nonlinear Dynamics in Biological Systems I (joint session DY/BP)
BP 10.8: Talk
Tuesday, March 18, 2025, 12:00–12:15, H43
Transient spatiotemporal chaos in cardiac excitable media — •Melvin Dix1,2, Thomas Lilienkamp1,3, Stefan Luther1,4,5, and Ulrich Parlitz1,2,5 — 1Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany — 2Institute for the Dynamics of Complex Systems, Georg-August-Universität Göttingen, Göttingen, Germany — 3Faculty for Applied Mathematics, Physics, and General Science, Computational Physics for Life Science, Nuremberg Institute of Technology Georg Simon Ohm, Nürnberg, Germany — 4Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Göttingen, Germany — 5German Center for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen, Germany
Life-threatening cardiac arrythmia such as ventricular fibrillation have been linked to spatiotemporal chaotic dynamics governed by scroll or spiral waves. It has been observed in vivo and in vitro that these dynamics can be transient, e.g. abruptly stop. Using simulations with different numerical models we investigate the effects of factors such as heterogeneities, motivated by the complexity of the heart. We show that these perturbations can (significantly) prolong the duration of chaotic transients and may also lead to persistent chaos or stable periodic wave patterns [1].
[1] Melvin Dix et al. Physical Review E 110(4), 044207 (2024).
Keywords: transient chaos; cardiac dynamics; heterogeneous excitable media