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. 2017 Dec;38(12):2301–2307. doi: 10.3174/ajnr.A5397

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

Variable Mirror Aneurysms
 Ipsilateral Aneurysms
Unruptured Ruptured P Value Unruptured Ruptured P mean P max
WSSmin 0.6 ± 0.9 0.4 ± 0.6 .24 1.3 ± 2.0 0.4 ± 0.8 <.001b <.001b
WSSmax 285.3 ± 216.1 269.5 ± 183.1 1.00 269.6 ± 324.5 784.9 ± 2730.4 .006b .05b
WSSmean 28.1 ± 26.8 22.3 ± 18.6 .49 29.3 ± 35.5 27.1 ± 36.8 .28 .81
WSSnorm 0.53 ± 0.40 0.44 ± 0.26 .30 0.60 ± 0.39 0.50 ± 0.32 .12 .43
SCI 5.48 ± 10.87 5.54 ± 4.53 .21 3.30 ± 3.95 6.74 ± 7.20 <.001b <.001b
LSA 51.6 ± 33.0 50.9 ± 33.4 .81 48.7 ± 32.4 49.6 ± 32.0 .72 1.00
OSImax 0.243 ± 0.123 0.334 ± 0.115 .008b 0.181 ± 0.134 0.332 ± 0.103 <.001b <.001b
OSImean 0.012 ± 0.010 0.014 ± 0.010 .55 0.009 ± 0.011 0.014 ± 0.010 .005b .06
Q 0.80 ± 1.15 0.72 ± 0.85 .79 0.23 ± 0.29 0.70 ± 0.62 <.001b <.001b
ICI 0.72 ± 0.89 0.82 ± 0.80 .66 0.24 ± 0.43 0.68 ± 0.57 <.001b <.001b
Vmax 82.3 ± 62.5 80.8 ± 44.4 .88 61.9 ± 63.1 98.2 ± 81.0 <.001b <.001b
VE 11.8 ± 10.1 10.1 ± 6.8 .77 9.1 ± 8.9 10.9 ± 9.4 .29 .70
SR 259.6 ± 192.3 229.2 ± 159.8 .68 339.6 ± 305.0 246.1 ± 236.4 .03b .18
VO 363.1 ± 284.9 319.1 ± 225.8 .70 445.7 ± 421.7 346.1 ± 345.6 .09 .38
CORELEN 1.481 ± 2.014 2.501 ± 3.159 .17 0.376 ± 0.557 2.226 ± 2.144 <.001b <.001b
PODENT 0.167 ± 0.136 0.175 ± 0.074 .33 0.137 ± 0.121 0.192 ± 0.127 .009b .08
Asize 0.594 ± 0.331 0.713 ± 0.361 .14 0.365 ± 0.185 0.726 ± 0.282 <.001b <.001b
Nsize 0.412 ± 0.185 0.422 ± 0.147 .75 0.306 ± 0.127 0.423 ± 0.136 <.001b <.001b
AR 0.956 ± 0.755 1.176 ± 0.551 .06 0.669 ± 0.408 1.198 ± 0.609 <.001b <.001b
Distality – – – 0.444 ± 0.345 0.612 ± 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).