Table 2.
The results of vessel assessment in the study groups (per vessel).
| Group | p-Value | ||
|---|---|---|---|
| Younger (≤ 60 y.o.) 103 (24.7%) |
Older (>60 y.o.) 314 (75.3%) |
||
| Vessel assessed | |||
| LAD | 64 (62.1%) | 185 (58.9%) | 0.56 |
| non-LAD | 39 (37.9%) | 129 (41.1%) | |
| All vessels | |||
| FFR ≤ 0.80, n (%) | 50 (48.5%) | 150 (47.8%) | 0.89 |
| FFR, median (Q1–Q3) | 0.81 (0.75–0.87) | 0.815 (0.76–0.88) | 0.52 |
| iFR/RFR ≤ 0.89, n (%) | 44 (42.7%) | 150 (47.8%) | 0.37 |
| iFR/RFR, median (Q1–Q3) | 0.90 (0.87–0.94) | 0.90 (0.85–0.94) | 0.50 |
| LAD | |||
| FFR ≤ 0.80, n (%) | 35 (54.7%) | 114 (61.6%) | 0.33 |
| FFR, median (Q1–Q3) | 0.80 (0.75–0.85) | 0.78 (0.73–0.84) | 0.43 |
| iFR/RFR ≤ 0.89, n (%) | 34 (53.1%) | 111 (60.0%) | 0.34 |
| iFR/RFR, median (Q1–Q3) | 0.89 (0.8625–0.92) | 0.88 (0.83–0.92) | 0.16 |
| Non-LAD | |||
| FFR ≤ 0.80, n (%) | 15 (38.5%) | 36 (27.9%) | 0.21 |
| FFR, median (Q1–Q3) | 0.83 (0.76–0.90) | 0.86 (0.80–0.91) | 0.16 |
| iFR/RFR ≤ 0.89, n (%) | 10 (25.6%) | 39 (30.2%) | 0.58 |
| iFR/RFR, median (Q1–Q3) | 0.93 (0.88–0.97) | 0.94 (0.88–0.97) | 0.89 |
| Concordance-general | |||
| concordant | 81 (78.6%) | 256 (81.5%) | 0.52 |
| discordant | 22 (21.4%) | 58 (18.5%) | |
| FFR−|iFR/RFR− | 45 (43.7%) | 135 (43.0%) | 0.60 |
| FFR−|iFR/RFR+ | 8 (7.8%) | 29 (9.2%) | |
| FFR+|iFR/RFR− | 14 (13.6%) | 29 (9.2%) | |
| FFR+|iFR/RFR+ | 36 (35.0%) | 121 (38.5%) | |
Abbreviations: FFR, fractional flow reserve; iFR, instantaneous wave-free ratio; LAD, left anterior descending artery; RFR, resting full-cycle ratio.