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Figure 3 Cumulative probability of first therapy for ventricular tachycardia (VT) in relationship to cycle length of induced VT. The cycle length of induced VT is divided at median value of 240 ms. The induction of a slower VT (240 ms) was more predictive of the subsequent clinical occurrence of VT than the induction of rapid VT (<240 ms), or noninducibility (solid line).