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Table 2: 
Complications of preoperative embolization of cerebral arteriovenous malformations with Onyx
ComplicationNo. of Procedures (%)No. of Patients (%)
Death0 (0)0 (0)
Permanent neurological deficit (> 6 mo)5 (6.1)5 (12.2)
Transient neurological deficit (< 48 h)2 (2.4)2 (4.8)
Technical complication without deficit16 (19.5)15 (36.6)
    Asymptomatic small infarction3 (3.7)3 (7.3)
    Perforation9 (11.0)9 (22.0)
    Catheter entrapment4 (4.9)4 (9.8)
No complication59 (72.0)19 (46.3)
Total82 (100)41 (100)