Volumetric measurements by intravascular ultrasound
| Variables | Group I (n = 15) | Group II (n = 20) | p value |
|---|---|---|---|
| Lumen volume (mm3) | 113.6 (44.0) | 125.7 (49.9) | NS |
| Vessel volume (mm3) | 291.0 (61.0) | 353.7 (110.0) | < 0.05 |
| Plaque volume (mm3) | 177.5 (48.4) | 228.0 (92.8) | < 0.05 |
| Volumetric plaque burden (%) | 61 (11) | 64 (10) | NS |
Values are mean (SD).
Groups I and II, lesions with and without inadequate compensatory vascular enlargement, respectively; segment length was 20 mm.