Table 2.
Physiological Characteristics of the Vessels (n = 691)
| Distal iFR value | |
| Median | 0.87 |
| Interquartile range | 0.81–0.91 |
| Proximal iFR value | |
| Median | 0.99 |
| Interquartile range | 0.98–1.01 |
| Vessel evaluated | |
| Total | 691 (100%) |
| Left anterior descending coronary artery | 549 (79.5%) |
| Left circumflex coronary artery | 72 (10.4%) |
| Right coronary artery | 56 (8.1%) |
| Other | 14 (2.0%) |
| Hemodynamic significance | |
| Distal iFR ≤0.89 | 470 (68.0%) |
| Distal iFR >0.89 | 221 (32.0%) |
| Significant pressure-wire drift | |
| Total | 217 (31.4%) |
| Proximal iFR <0.98 | 147 (21.3%) |
| Proximal iFR >1.02 | 70 (10.1%) |
iFR = instantaneous wave-free ratio.