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Terminating spiral waves and spatiotemporal chaos in heart by synchronous repolarization

Zhou Zhen-Wei Wang Li-Li Qiao Cheng-Gong Chen Xing-Ji Tian Tao-Tao Tang Guo-Ning

Terminating spiral waves and spatiotemporal chaos in heart by synchronous repolarization

Zhou Zhen-Wei, Wang Li-Li, Qiao Cheng-Gong, Chen Xing-Ji, Tian Tao-Tao, Tang Guo-Ning
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  • Received Date:  20 March 2013
  • Accepted Date:  20 April 2013
  • Published Online:  05 August 2013

Terminating spiral waves and spatiotemporal chaos in heart by synchronous repolarization

  • 1. College of Physical Science and Technology, Guangxi Normal University, Guilin 541004, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant No. 11165004).

Abstract: In order to simulate the phenomenon that electric shock defibrillation shortens action potential duration, the synchronous repolarization process is introduced into Luo-Rudy phase I model of cardiac tissue. Effects of synchronous repolarization on dynamics of spiral waves and spatiotemporal chaos are investigated. Numerical results show that when the control period is small, the synchronous repolarization can effectively eliminate spiral waves and spatiotemporal chaos. However, the synchronous repolarization can only eliminate spiral waves or spatiotemporal chaos under some control parameters. When spiral waves cannot be controlled, the transition from spiral wave to spatiotemporal chaos or the spiral wave with longer period and wavelength is observed. The control mechanism is analyzed.

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