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Crescendo in depolarization and repolarization heterogeneity [R‐wave heterogeneity (RWH) (□), T‐wave heterogeneity (TWH) (■)] (lower panel), culminating in T‐wave alternans (TWA) and ventricular tachycardia (VT) (upper panel) in lead V5 in a patient enrolled in the Prospective Randomized Evaluation of Cardiac Ectopy with Dobutamine or Nesiritide Therapy (PRECEDENT) trial. Reprinted with permission from Nearing et al. (2012)
