The influence of diversity on spiral wave in the cardiac tissue

¹ College of Science, China University of Mining and Technology - Xuzhou 221000, China
² Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan 430071, China
³ School of Mechanics and Civil Engineering, China University of Mining and Technology - Xuzhou 221000, China
⁴ Department of Physics, Lanzhou University of Technology - Lanzhou 730050, China

^a tjuns1979@yahoo.com.cn

Received: 30 July 2011
Accepted: 29 November 2011

Abstract

Based on a modified 2D cardiac tissue model, the spiral-wave dynamics is numerically studied. The diversity in the cardiac tissue is considered by letting the value of a dynamical parameter Gaussian distributed. It is found that, comparing to the dynamical parameter I₀ of the model, the spiral waves in the cardiac tissue are much robust to the diversity. Only strong diversity can destroy the spiral waves. It is intriguing that although the weak diversity can not suppress the spiral, it can induce the transition of spiral tips between different types.