The influence of diversity on spiral wave in the cardiac tissue

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 (g) over bar (Ca) Gaussian distributed. It is found that, comparing to the dynamical parameter I-0 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. Copyright (C) EPLA, 2012