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Figure 6 X- and Y-Conduction Vectors in Response to Autonomic Maneuvers

Each panel shows X- and Y-components of conduction velocity for each region and for each intervention. (A) In the PV, VS, P, and P + VS cause a significant change in the Y-vector and the resulting X/Y relationship, indicating a change in activation direction. Panels B and C show X- and Y-vectors for the PLA and LAA, respectively. In both regions, there was no significant change in either X- or Y-component or in the X/Y relationship in response to any intervention. *p 0.05 (X vs. Y). Abbreviations as in Figure 1.