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. Author manuscript; available in PMC: 2022 Jul 20.
Published in final edited form as: Nat Cardiovasc Res. 2022 Jul 4;1(7):611–616. doi: 10.1038/s44161-022-00091-z

Figure 1. The relationship between fractional and absolute coronary blood flow reduction.

Figure 1

Concordance between fractional and absolute CBF reduction is indicated by the labels according to the FFR range. Concordance means significant FFR (≤0.80) and significant reduction in aCBF (≥23 mL/min), or insignificant FFR (>0.80) and insignificant reduction in aCBF (<23 mL/min). The horizontal and leftward vertical dashed lines reflect the thresholds for physiological significance for FFR and aCBF. The asterisks indicate statistical significance for differences in concordance (z scores) compared with the FFR>0.80 group at, the P<0.05* and P<0.01** level (exact P values [2 tailed] are 0.021 for the ≤0.80 group, <0.001 for the 0.70-0.80 and 0.75-0.80 groups and 0.02 for the ≤0.70 group, unadjusted for multiple comparisons). No replicates.