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(color online). (a) A rotor due to a critical structure. (b) An ablation is made by rendering a 20 × 20 section of tissue around the critical structure unexcitable (cross-hatched red). (c)–(f) The ablation terminates the reentrant circuit and the system returns to a planar wave front phase. See Fig. 3 in the Supplemental Material [32] for the full image and animation.
