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The dynamics of activation waves in excitable media can give rise to spiralturbulence, the resulting spatiotemporal chaos being associated with empiricalbiological phenomena such as life-threatening disturbances in the naturalrhythm of the heart. In this paper, we propose a spatially extended butnon-global scheme using an array of control points for terminating suchspatiotemporally chaotic excitations. A low-amplitude control signal is appliedsequentially at each point on the array, resulting in a traveling wave ofexcitation in the underlying medium which drives away the turbulent activity.Our method is robust even in the presence of significant heterogeneities in themedium, which have often been an impediment to the success of other controlschemes.

Controlling spatiotemporal chaos in excitable media using an array of control points