Morphometric and haemodynamic variables in normotensive Williams patients and controls
| Variable | Normotensive Williams patients (n=12) |
Controls (n=21) | p Value |
| Intima–media thickness (mm) | 0.61 (0.08) | 0.51 (0.02) | < 0.001 |
| Diastolic diameter (mm) | 4.1 (0.4) | 5.1 (0.6) | < 0.001 |
| IMT/diastolic diameter | 0.15 (0.02) | 0.10 (0.01) | < 0.001 |
| Distensibility (mm Hg−1.10−2) | 1.1 (0.3) | 0.8 (0.3) | < 0.01 |
| Cross sectional compliance (mm2.mm Hg−1) | 0.14 (0.04) | 0.15 (0.05) | NS |
| Circumferential wall stress (mm Hg.102) | 2.1 (0.5) | 3.0 (0.7) | < 0.01 |
| Young's elastic modulus (Einc) (mm Hg.102) | 7.4 (2.0) | 14.0 (5.0) | < 0.001 |
Values are mean (SD).
IMT, intima–media thickness.