Click on image to view larger version.

Figure 1 Twelve-lead electrocardiograms under baseline condition (A) and precordial electrocardiograms during epinephrine infusion (2 min after start of epinephrine) (B) in an LQT1 mutation carrier. The mean corrected Q-Tend interval was dramatically prolonged by epinephrine, leading to spontaneously terminating torsade de pointes.