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Figure 3 Kaplan-Meier survival curves event free of cardiac death in patients stratified according to the results of rest-stress WMSI variation during DIP (Delta DIP WMSI). The survival is progressively worse for larger variations on WMSI. Delta DIP WMSI > .37 vs. DIP negative, p < 0.0001; Delta DIP WMSI >.37 vs. DIP .37, p < 0.004. Cardiac death (n = 18); follow-up 38 ± 21 months.