Table 2:

Comparison of angioarchitecture and hemodynamics between the unruptured and ruptured AVMs

Characteristics	Unruptured	Ruptured	P Value
No. of patients	77	103
Mean nidus volume (mean) (mL)	40.2 (SD, 46.4)	13.6 (SD, 21.0)	<.001^{^a}
Angioarchitecture
Feeding artery dilation	57 (74.0%)	51 (49.5%)	.001^{^a}
Single feeding artery	12 (15.6%)	35 (34.0%)	.003^{^a}
Deep venous drainage	17 (22.1%)	38 (36.9%)	.035^{^a}
Single draining vein	33 (42.9%)	65 (63.1%)	.07
Drainage vein stenosis	11 (14.3%)	27 (26.2%)	.07
Diffuse nidus	15 (19.5%)	38 (36.9%)	.01^{^a}
Flow-related aneurysm	14 (18.2%)	43 (41.7%)	.001^{^a}
Hemodynamics
Feeding artery
TTP (mean) (sec)	2.88 (SD, 0.80)	3.14 (SD, 1.01)	.07
FWHM (mean) (sec)	2.83 (SD, 1.02)	3.33 (SD, 1.29)	.006^{^a}
Inflow gradient (mean)	1265.61 (SD, 912.53)	1317.85 (SD, 1018.43)	.72
Outflow gradient (mean)	636.89 (SD, 505.72)	600.35 (SD, 511.84)	.63
Stasis index (mean)	2.42 (SD, 0.99)	2.63 (SD, 1.04)	.16
Drainage vein
TTP (mean) (sec)	3.62 (SD, 1.07)	3.76 (SD, 1.30)	.42
FWHM (mean) (sec)	3.00 (SD, 0.75)	3.56 (SD, 1.29)	<.001^{^a}
Inflow gradient (mean)	1854.28 (SD, 2794.89)	1289.84 (SD, 975.82)	.06
Outflow gradient (mean)	741.99 (SD, 568.85)	610.58 (SD, 522.51)	.11
Stasis index (mean)	2.38 (SD, 0.65)	2.52 (SD, 0.97)	.28
MTT (ICA-sinus) (mean) (sec)	1.48 (SD, 1.03)	1.97 (SD, 1.70)	.02^{^a}
MTT (feeding-draining) (mean) (sec)	0.73 (SD, 0.97)	0.62 (SD, 1.04)	.47
ADW (mean)	695.02 (SD, 607.38)	742.75 (SD, 720.42)	.64
TRV (mean)	225.35 (SD, 211.26)	115.93 (SD, 157.39)	<.001^{^a}
LFI (mean)	49.40 (SD, 98.25)	390.27 (SD, 919.81)	<.001^{^a}