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(A) Normalized voltage maps during transition from paced wave to figure-eight to spiral wave. (B) (a) Bipolar pECGs (pVx and pVy) and (b) unipolar pECG (pV0). Vertical bars have been added to mark the relative timing of the peaks and valleys. (C) pVCG. Different colors in the times in panel A correspond to different propagation patterns and are the same as in panels B and C.
