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Figure 1 Plots for the sensitivity and specificity of CFVR (A), relative CFVR (B) and FFR (C), as calculated with receiver operating characteristics analysis on a per-patient basis (n = 127). The best cut-off value (BCV), defined as the highest sum of sensitivity and specificity, is indicated. CFVR = coronary flow velocity reserve; FFR = fractional flow reserve.
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