Table 1:

Baseline characteristics and results of endovascular treatmenta

Total (n = 224)Ruptured BAVMs (n = 136)Unruptured BAVMs (n = 88)P Value
Age (yr)37.8 ± 1637.9 ± 17.737.6 ± 13.3.087
Male127 (57%)81 (60%)46 (52%).282
PresentationNA
    Hemorrhage136 (60%)136 (100%)0 (0%)
    Seizure42 (19%)0 (0%)42 (48%)
    Incidental37 (17%)0 (0%)37 (42%)
    Other9 (4%)0 (0%)9 (10%)
Initial mRS score.0001
    Good (0–2)178 (79%)91 (67%)87 (99%)
    Poor (3–5)46 (21%)45 (33%)1 (1%)
BAVM location.001
    Cortical and subcortical176 (79%)96 (71%)80 (90%)
    Deep19 (8%)15 (11%)4 (5%)
    Infratentorial29 (13%)25 (18%)4 (5%)
    Eloquent area77 (34%)55 (40%)22 (25%).017
Spetzler-Martin grade.361
    I71 (32%)40 (29%)31 (35%)
    II153 (68%)96 (71%)57 (65%)
Mean nidus diameter (cm)2.1 ± 1.11.9 ± 1.12.4 ± 1.1.0001
Deep venous drainage45 (20%)32 (24%)13 (15%).126
Venous ectasia54 (24%)27 (20%)27 (31%).061
Arterial aneurysm20 (9%)14 (10%)6 (7%).475
Intranidal aneurysm42 (19%)33 (24%)9 (10%).020
Mean No. of procedures1.6 ± 0.91.4 ± 0.81.8 ± 1.1.003
Duration of follow-up angiography (mo)9.7 ± 11.98.7 ± 10.411.3 ± 13.8.117
Angiographic result.091
    Complete exclusion205 (92%)128 (94%)77 (88%)
    Remnant19 (8%)8 (6%)11 (12%)1.000
Post-EVT AVM surgery7 (3%)4 (3%)3 (4%)NA
Post-EVT radiosurgery8 (4%)2 (2%)6 (8%)NA
Severe post-EVT hematoma11 (5%)7 (5%)4 (5%)1.000
Significant post-EVT ischemia5 (2%)4 (3%)1 (1%).651
Postop outcome (mRS).001
    Good (0–2)179 (80%)96 (71%)83 (94%)
    Poor (3–5)44 (19%)40 (29%)4 (5%)
    Mortality (6)1 (0.4%)0 (0%)1 (1%)
    Improved/unchanged mRS score211 (94%)127 (93%)85 (96%)1.000
  • Note:—NA indicates not applicable; postop, postoperative.

  • a Data are presented as No. (%) or means.