title: Spetzler-Martin grades IV and V arteriovenous malformations.
authors.forename: Roberto C
authors.initials: RC
authors.lastname: Heros
mesh_terms: D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D017063:Outcome Assessment, Health Care; D011859:Radiography; D012720:Severity of Illness Index