Figure 3.

Ventricular tachycardia during LAD occlusion and reperfusion. Burst pacing at 20 ms cycle length 1 h after the onset of LAD occlusion. Top: examples showing three burst-pacing events (I, II, III) for representative K258stop/KO (right) and Cx43/KO control hearts (left). Horizontal bars: 5 s; vertical bars: 2.5 V. Bottom: burst-pacing events at expanded time scale. VTs were induced by three sets of burst stimuli in K258stop/KO hearts, and duration of VT episode was longer than that in Cx43/KO hearts.