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Figure 4 Activation Change in the PV With P
Panels A, C, and E represent baseline activation during sinus rhythm in the PV, PLA, and LAA, respectively. Panels B, D, and F represent activation in the PV, PLA, and LAA in the presence of P. (A) At baseline, earliest activation is noted on the left side of the plaque (*). (B) With P, earliest activation shifts to the opposite end of the plaque (*). No significant differences are noted in earliest activation or activation direction in the PLA (C, E) or in the LAA (E, F) in the presence of P. Each isochronal step represents 1 ms. *Earliest activation. The grid on the right shows that earliest activation is black, with later times indicated by progressively decreasing shades of gray. Abbreviations as in Figure 1.
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