Figure 6.
- Multielectrode array covering the affected (noncolored) and
nonaffected (blue) zones (postmortem staining by Evans blue dye);
- Photo of multielectrode array;
- Unipolar electrograms with AT, RT, and ARI measurements;
- Conduction velocity measurements across the normal and ischemic zones
with representative electrograms recorded at sites a, b, and c
corresponding to the normal, border and ischemic zones, respectively.
“St” indicates a pacing artifact. Electrical step symbol indicates a
pacing site. Arrow shows the direction of impulse propagation from
normal to ischemic zone;
- Regularly spaced multielectrode array with interelectrode distance d.
The boundary electrodes located on the edge of the array (white);
- Gradients of activation were computed using the finite difference
technique along the dotted lines, in the horizontal and vertical
directions, using the times at the four highlighted electrodes to
calculate the conduction velocity vector for the center point.