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          TABLE 1:
         
            Clinical outcomes for patients undergoing parent vessel occlusion of the vertebral artery
          
Age (y)/Sex Group Aneurysm Location and Type Mode of Presentation Method of Embolization Months of Follow-up Clinical Presentation (Modified Rankin Score) Clinical Outcome (Modified Rankin Score)
1 48/F I R VA dis SAH Coil 2 4 2
2 56/M I L VA fus SAH Coil 14 5 4
3 46/M I R VA fus SAH Coil 10 1 0
4 52/M I L VA dis SAH Balloon 23 5 1
5 67/F I R VA fus SAH Coil 72 5 3
6 76/M I L VA fus SAH Coil 76 5 3
Mean 58 25.3 
7 52/M II L VB fus SAH Balloon 14 3 4
8 45/M II B VA dis L VA pa SAH Coil 12 5 4
9 78/M II L VB fus Mass effect Coil 30 3 6
10 61/M II BA fus L VA dis SAH Balloon + coil 1^* 5 6
11 71/M II L VB fus Mass effect Coil 19 1 1
12 66/M II L VB fus Mass effect Coil 9 4 6
13 78/M II R VB fus Mass effect Balloon 4^** 3 6
Mean 64 12.7 
Overall mean 61 22.0 
Note.—I indicates parent vessel occlusion for angiographic cure; II, parent vessel occlusion for angiographic palliation; R, right; L, left; VA, vertebral artery; dis, acute dissecting aneurysm; fus, chronic fusiform aneurysm; VB, vertebrobasilar; pa, pseudoaneurysm; SAH, subarachnoid hemorrhage.
* Deceased at 1 month after procedure.
** Deceased at 4 months after procedure; died in sleep.