Hemodynamic and geometric characteristics of ruptured and unruptured mirror and multiple ipsilateral aneurysmsa

VariableMirror AneurysmsIpsilateral Aneurysms
UnrupturedRupturedP ValueUnrupturedRupturedPmeanPmax
WSSmin0.6 ± 0.90.4 ± 0.6.241.3 ± 2.00.4 ± 0.8<.001b<.001b
WSSmax285.3 ± 216.1269.5 ± 183.11.00269.6 ± 324.5784.9 ± 2730.4.006b.05b
WSSmean28.1 ± 26.822.3 ± 18.6.4929.3 ± 35.527.1 ± 36.8.28.81
WSSnorm0.53 ± 0.400.44 ± 0.26.300.60 ± 0.390.50 ± 0.32.12.43
SCI5.48 ± 10.875.54 ± 4.53.213.30 ± 3.956.74 ± 7.20<.001b<.001b
LSA51.6 ± 33.050.9 ± 33.4.8148.7 ± 32.449.6 ± 32.0.721.00
OSImax0.243 ± 0.1230.334 ± 0.115.008b0.181 ± 0.1340.332 ± 0.103<.001b<.001b
OSImean0.012 ± 0.0100.014 ± 0.010.550.009 ± 0.0110.014 ± 0.010.005b.06
Q0.80 ± 1.150.72 ± 0.85.790.23 ± 0.290.70 ± 0.62<.001b<.001b
ICI0.72 ± 0.890.82 ± 0.80.660.24 ± 0.430.68 ± 0.57<.001b<.001b
Vmax82.3 ± 62.580.8 ± 44.4.8861.9 ± 63.198.2 ± 81.0<.001b<.001b
VE11.8 ± 10.110.1 ± 6.8.779.1 ± 8.910.9 ± 9.4.29.70
SR259.6 ± 192.3229.2 ± 159.8.68339.6 ± 305.0246.1 ± 236.4.03b.18
VO363.1 ± 284.9319.1 ± 225.8.70445.7 ± 421.7346.1 ± 345.6.09.38
CORELEN1.481 ± 2.0142.501 ± 3.159.170.376 ± 0.5572.226 ± 2.144<.001b<.001b
PODENT0.167 ± 0.1360.175 ± 0.074.330.137 ± 0.1210.192 ± 0.127.009b.08
Asize0.594 ± 0.3310.713 ± 0.361.140.365 ± 0.1850.726 ± 0.282<.001b<.001b
Nsize0.412 ± 0.1850.422 ± 0.147.750.306 ± 0.1270.423 ± 0.136<.001b<.001b
AR0.956 ± 0.7551.176 ± 0.551.060.669 ± 0.4081.198 ± 0.609<.001b<.001b
Distality0.444 ± 0.3450.612 ± 0.321<.008b.04b
  • Note:—LSA indicates percentage area under low WSS; SCI, shear concentration index; Vmax, maximum flow velocity; Q, aneurysm flow rate; ICI, inflow concentration index; norm, normalized; Asize, aneurysm maximum size; Nsize, neck maximum size; AR, aspect ratio (≤depth/neck size); VO, mean aneurysm vorticity; SR, shear rates; VE, mean aneurysm velocity; Distality, coordinate of vessel segment along the arterial tree.

  • a Values are given as mean ± SD. P values correspond to univariate paired Wilcoxon rank sum tests. For ipsilateral aneurysms, mean and maximum P values of 100 randomly selected ruptured–unruptured pairs are given.

  • b Significant difference (P < .05).