Flow variables used to characterize different aspects of the hemodynamic environment of ruptured and unruptured PCOM aneurysmsa
| Variable | Unruptured | Ruptured | P |
|---|---|---|---|
| Wall shear stress distribution characteristics | |||
| WSSmin, dyne/cm2 | 0.64 ± 1.39 | 0.29 ± 0.74 | .002b |
| WSSmean, dyne/cm2 | 22.34 ± 20.16 | 24.17 ± 23.21 | .59 |
| WSSnorm | 0.51 ± 0.33 | 0.43 ± 0.28 | .02b |
| WSSmax, dyne/cm2 | 231.54 ± 172.1 | 341.30 ± 299.9 | <.001b |
| MWSSnorm | 5.71 ± 5.05 | 6.10 ± 3.18 | <.001b |
| OSImax | 0.261 ± 0.137 | 0.336 ± 0.102 | <.001b |
| OSImean | 0.013 ± 0.014 | 0.017 ± 0.015 | <.001b |
| SCI | 5.76 ± 8.50 | 7.04 ± 7.17 | <.001b |
| LSA | 52.32 ± 31.91 | 59.63 ± 30.46 | .05 |
| Aneurysm inflow characteristics | |||
| Q, cm3/s | 0.71 ± 0.85 | 0.88 ± 0.99 | .01b |
| ICI | 0.649 ± 0.785 | 0.782 ± 0.674 | .02b |
| Intra-aneurysmal flow characteristics | |||
| Vmax, cm/s | 67.89 ± 33.84 | 95.73 ± 59.21 | <.001b |
| VE, cm/s | 9.75 ± 7.39 | 10.71 ± 7.67 | .18 |
| VO, 1/s | 320.47 ± 274.3 | 323.66 ± 254.7 | .57 |
| SR, 1/s | 236.26 ± 201.9 | 235.06 ± 182.4 | .67 |
| CORELEN, cm | 1.837 ± 2.484 | 3.133 ± 2.982 | <.001b |
| PODENT | 0.179 ± 0.140 | 0.206 ± 0.117 | <.001b |
Note:—CORELEN indicates vortex core length - flow complexity; ICI, inflow concentration index; LSA, low shear area (% of aneurysm sac); MWSSnorm, maximum normalized WSS; OSImax, maximum oscillatory shear index; OSImean, mean oscillatory shear index; PODENT, proper orthogonal decomposition entropy—flow stability; Q, aneurysm inflow rate; SCI, shear concentration index; SR, mean aneurysm shear rate; VE, mean aneurysm velocity; Vmax, maximum aneurysm velocity; VO, mean aneurysm vorticity; WSSmax, maximum WSS; WSSmean, average WSS; WSSmin, minimum WSS; WSSnorm, normalized WSS.
↵a Values given are mean ± standard deviation, and P values correspond to the Mann-Whitney U test.
↵b Statistically significant association.