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Figure 4 Kaplan-Meier event-free survival curves by symptomatic status. Patients without ischemia (n = 242) had significantly lower event rates than patients with silent (n = 44) or symptomatic ischemia (n = 21; p = 0.006 and p < 0.0001, respectively); patients with silent ischemia tended to have lower event rates than patients with symptomatic ischemia (p = 0.12). MPS = myocardial perfusion SPECT.
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