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Figure 4 Analysis of slice‐corrected delay time during hyperaemia in antegradely perfused and collateral‐dependent myocardium per patient and in the myocardium of healthy volunteers. The cut‐off value for hyperaemic Δtd of >0.6 s for hyperaemia was derived from receiver operating characteristics (ROC) analysis, and indicates the best sensitivity and specificity to detect collateral‐dependent myocardium (see text and table 3 for details).
