Morphologic and hemodynamic variables for the ruptured and unruptured aneurysms*
| Ruptured (n = 8) | Unruptured (n = 18) | P Value | |
|---|---|---|---|
| Age (yr) | 60 ± 17 | 55 ± 12 | .31 |
| Artery size (mm) | 4.7 ± 0.7 | 4.7 ± 0.4 | .60 |
| Aneurysm size (mm) | 11.0 ± 6.9 | 6.9 ± 3.3 | .09 |
| Ostium size (mm) | 4.1 ± 1.1 | 4.1 ± 1.2 | .60 |
| Aspect ratio | 2.0 ± 0.9 | 1.5 ± 0.8 | .19 |
| Area at aneurysm (mm2) | 256 ± 351 | 124 ± 110 | .37 |
| Ostium area (mm2) | 18 ± 8 | 19 ± 11 | .85 |
| Mean shear at artery (N/m2) | 4.0 ± 1.8 | 4.5 ± 2.1 | .57 |
| Mean shear at aneurysm (N/m2) | 1.9 ± 1.1 | 2.6 ± 1.9 | .50 |
| Mean shear at ostium (N/m2) | 5.7 ± 4.3 | 5.5 ± 3.2 | .99 |
| Aneurysm shear/arterial shear (%) | 48 ± 33 | 59 ± 33 | .26 |
| Maximal wall shear (N/m2) | 26 ± 15 | 23 ± 12 | .80 |
| Low wall shear area (mm2) | 128 ± 290 | 22 ± 44 | .04 |
| Ratio of low shear area (%) (low shear area/dome area) | 27 ± 25 | 11 ± 17 | .03 |
* Numbers are presented as mean ± SD. The Mann-Whitney rank sum test is used for statistical analysis. A P value < .05 is deemed statistically significant.