Table 2.
Differences in FD-OCT measurements between Stenosis with FFR > 0.80 or ≤ 0.80 (values are mean ± standard deviation).
| FFR ≤ 0.80 (n = 5) | FFR > 0.80 (n = 15) | p value | |
|---|---|---|---|
| Minimal lumen area (MLA), mm2 | 1.15 ± 0.25 | 2.8 ± 1.03 | 0.001 |
| Minimal lumen diameter (MLD), mm | 0.91 ± 0.11 | 1.50 ± 0.33 | < 0.001 |
| Proximal reference lumen area, mm2 | 4.15 ± 0.52 | 6.42 ± 2.48 | 0.03 |
| Proximal reference lumen diameter, mm | 2.29 ± 0.14 | 2.78 ± 0.52 | 0.03 |
| Distal reference lumen area, mm2 | 10.64 ± 6.4 | 12.28 ± 4.67 | 0.27 |
| Distal reference lumen diameter, mm | 3.53 ± 1.12 | 3.86 ± 0.81 | 0.27 |
| Percent area stenosis (%AS), % | 70.2 ± 4.6 | 61.2 ± 13.9 | 0.08 |
| Stenosis resistance (Rs), mm Hg cm− 3.s | 12.3 ± 5.2 | 3.54 ± 2.49 | < 0.001 |
| Blood flow rate (Q), ml/s | 2.54 ± 0.55 | 4.81 ± 1.95 | 0.01 |
| Blood flow velocity, cm/s | 2.23 ± 0.23 | 1.73 ± 0.26 | < 0.001 |
FD-OCT = frequency domain optical coherence tomography.