Supplemental Fig. S4

Example high-resolution mapping results of targeted gastric ablation of a normal pacemaker site with a large closed-box ablation in female pig. (A) Position of the FPC array on the stomach at baseline. (B) Isochronal AT map as explained in Fig. 2 (isochronal interval = 1 s). (C) Velocity map of the same slow wave, as explained in Fig. 2. (D) Amplitude map of the same slow wave. (i) Baseline, normal pacemaker with the rapid, high amplitude circumferential activation initiating from high corpus, greater-curvature. (ii-iv) Various positions of the FPC array, creating a more complete picture of the slow wave activity of the surrounding area of a closed-box ablation. After elimination of activation at the normal pacemaker site, a new pacemaker site distal to the ablation region activated the stomach. In this example, slow wave activity from the new pacemaker site propagated in a retrograde direction to activate the proximal tissue, which collided with the following slow wave. Black and white arrows indicate the direction of slow wave propagation, the double black lines represent colliding waves. The black rectangle indicates a conduction block at the ablation lesion.