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

Table 4

Physiological characteristics.

Physiological parameters	128 vessels
Pre-PCI
QFR	0.63 ± 0.12
QFR ≤ 0.80	125 (98%)
FFR	0.66 ± 0.15
FFR ≤ 0.80	117 (91%)
Post-PCI
Residual QFR	0.96 (0.91–0.99)
Residual QFR ≤ 0.80	4 (3%)
Residual QFR < 0.90	27 (21%)
FFR	0.91 (0.86–0.96)
FFR ≤ 0.80	13 (10%)
FFR < 0.90	54 (42%)

Values are presented as mean ± SD, number with %, or as median (Q1–Q3). FFR, fractional flow reserve; PCI, percutaneous coronary intervention; QFR, quantitative flow ratio.