Residual Quantitative Flow Ratio to Estimate Post‐Percutaneous Coronary Intervention Fractional Flow Reserve

Figure 4

Diagnostic performance of residual QFR for detecting a suboptimal PCI result. ROC curve with AUC demonstrating the performance of residual QFR to predict a suboptimal PCI result defined by post-PCI FFR < 0.90. AUC, area under receiver operating characteristics curve; FFR, fractional flow reserve; PCI, percutaneous coronary intervention; QFR, quantitative flow ratio; CI, confidence interval; ROC, receiver operator characteristics.