Figure 2.

Bipolar Voltage Comparison During Sinus and Sense Protocol

Substrate maps during intrinsic rhythm (A) and “sense protocol” pacing (B) in a patient with previous anterior myocardial infarction requiring ventricular tachycardia ablation. Comparison of bipolar voltage during intrinsic rhythm and sense protocol mapping shows similar delineation of scar region. Bipolar voltage was set to conventional criteria with dense scar <0.5 mV in gray, normal voltage >1.5 mV in purple, and scar border zone 0.5 to 1.5 mV. Color bar indicates voltage to the left of each map.