Morphologic and hemodynamic variables and the origin of aneurysms*
| Oph (n = 9) | PcomA (n = 8) | P Value | |
|---|---|---|---|
| Age (yr) | 56 ± 18 | 63 ± 14 | .98 |
| Artery size (mm) | 4.4 ± 0.7 | 4.2 ± 0.8 | .56 |
| Aneurysm size (mm) | 8.0 ± 3.3 | 10.2 ± 7.3 | .74 |
| Ostium size (mm) | 4.4 ± 1.5 | 3.6 ± 1.1 | .32 |
| Aspect ratio | 1.7 ± 1.0 | 2.1 ± 0.9 | .94 |
| Dome area at aneurysm (mm2) | 133 ± 125 | 259 ± 350 | .96 |
| Ostium area (mm2) | 21 ± 14 | 17 ± 9 | .84 |
| Mean shear at artery (N/m2) | 4.0 ± 1.3 | 4.3 ± 2.1 | .81 |
| Mean shear at aneurysm (N/m2) | 2.2 ± 1.9 | 2.2 ± 1.4 | .99 |
| Mean shear at ostium (N/m2) | 4.7 ± 2.3 | 6.7 ± 4.8 | .89 |
| Aneurysm shear/arterial shear (%) | 49 ± 30 | 61 ± 21 | .89 |
| Maximal wall shear (N/m2) | 25 ± 10 | 25 ± 16 | .89 |
| Low wall shear area (mm2) | 30 ± 55 | 133 ± 288 | .61 |
| Ratio of low shear area (%) (low shear area/dome area) | 14 ± 20 | 30 ± 24 | .32 |
Note:—Oph indicates ophthalmic artery; PcomA, posterior communicating artery.
* 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.