Figure 3.

Dynamic Functional Late Potential Unmasking by the Sense Protocol

Color maps of late potentials (last deflection) during intrinsic rhythm (A) and sense protocol pacing (B), along with recorded electrograms. During intrinsic rhythm, late potentials lay dormant within the QRS or just post-QRS (A), while during the sense protocol, late potentials are unmasked as shown in B and also the corresponding electrograms. Electrograms were recorded from the same area as shown by the high density grid in both maps. Highlighted areas in yellow indicate regions of local abnormal ventricular activity or late potentials.