Volume 117, Number 5, March 2017
|Number of page(s)||6|
|Published online||24 April 2017|
Cardiac alternans reduction by chaotic attractors in T ± ϵ feedback control
1 Department of Physics and Center for Complex Systems, National Central University Taoyuan City, Taiwan 320, R.O.C.
2 Institute of Research and Development, Duy Tan University - K7/25 Quang Trung, Danang, Vietnam
3 Institute of Physics, Academia Sinica - Nankang, Taipei, Taiwan 115, R.O.C.
Received: 17 November 2016
Accepted: 6 April 2017
To achieve control in dynamical systems, one usually avoids the generation of chaos. However, an effective control of an unstable dynamical system can also be practically achieved by deliberately inducing chaos in the system if the induced chaotic attractors are confined in a very small region in phase space. Using nonlinear dynamic analysis of the cardiac restitution model, we reveal that the mechanism of the recently proposed T ± ϵ control for cardiac alternans suppression is due to the confined chaotic attractors so generated. These results are confirmed experimentally by detailed phase-space portrait and transition dynamics measurements in whole heart experiments.
PACS: 05.45.-a – Nonlinear dynamics and chaos / 87.19.Hh – Cardiac dynamics / 05.45.Gg – Control of chaos, applications of chaos
© EPLA, 2017
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