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Figure 5 Kaplan-Meier analysis showing cumulative rates of event-free survival in 75 patients with chronic heart failure stratified into four groups according to their endothelium-dependent flow-mediated vasodilation (FMD) and B-type natriuretic peptide (BNP) levels—group A: FMD >6.8%, BNP <208 pg/ml; group B: FMD <6.8%, BNP <208 pg/ml; group C: FMD >6.8%, BNP >208 pg/ml; and group D: FMD <6.8%, BNP >208 pg/ml.
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