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Figure 4 Kaplan-Meier analysis showing cumulative rates of event-free survival in 75 patients with chronic heart failure stratified into two groups according to the median of endothelium-dependent flow-mediated vasodilation (FMD). Patients with FMD >6.8% had a significantly better event-free survival compared with patients with FMD <6.8% (p = 0.004).
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