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Figure 6 Representative repolarization and depolarization maps on the epicardial surface in the ST-segment elevation (Brugada-ECG) condition just before non-sustained polymorphic ventricular tachycardia (VT) (A, B), snapshots of phase movie during polymorphic VT originated from the epicardial phase 2 re-entry (C), and optical action potentials at each site (a to f) together with a transmural electrocardiogram (ECG) (D). Open circles = singularity points. APD50 = action potential duration at 50% repolarization. Please see the for accompanying video.
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