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Correlation between IVUS-derived parameters and iFR
| IVUS-derived value | Correlation with iFR |
||
|---|---|---|---|
| Correlation coefficient | P value | ||
| MLD (mm) | 2.19 ± 0.68 | 0.41 | <0.0001 |
| MLA (mm2) | 4.99 (3.74 – 6.95) | 0.42 | <0.0001 |
| Area stenosis (%) | 48.9 ± 17.2 | −0.38 | <0.0001 |
| MLA/BSA (mm2/m2) | 2.77 (2.17 – 3.80) | 0.40 | <0.0001 |
Abbreviations: IVUS: Intravascular ultrasound, iFR: instantaneous wave free ratio, MLD: Minimum Lumen Diameter, MLA: Minimum Lumen Area, BSA: Body Surface Area
