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Location Ruptured (n = 118) Unruptured (n = 72) Anterior circulation 88 (74.6) 53 (73.6) Anterior choroidal artery 4 2 Posterior communicating artery 3 4 Paraclinoid ICA 7 32 ICA bifurcation 5 2 A1 segment of the ACA 1 1 Anterior communicating artery 45 6 Distal ACA 6 1 M1 segment of the MCA 1 0 MCA bifurcation 6 5 Posterior circulation 30 (25.4) 19 (26.4) Basal artery tip 16 11 Distal posterior cerebral artery 3 1 Superior cerebellar artery 2 3 Basal artery trunk 1 1 Vertebrobasilar junction 1 0 Posterior inferior cerebellar artery 7 3 Note.—Data in parentheses are percentages. ACA is anterior cerebral artery; ICA, internal carotid artery; and MCA, middle cerebral artery.
Complication Ruptured (n = 118) Unruptured (n = 72) Retreated (n = 20) Incidence (%) Thromboembolism (n = 22) 13 5 4 10.4 Intraprocedural rupture (n = 9) 9 0 0 4.2 Coil migration (n = 2) 2 0 0 1.0 Parent-vessel injury (n = 2) 2 0 0 1.0 Postprocedural rupture (n = 1) 1 0 0 0.5 Cranial nerve palsy (n = 1) 0 1 0 0.5 Total (n = 37) 27 6 4 17.6 Complication Neurologic Sequlae Total Incidence (%) None Transient Persistent Fatal Intraprocedural rupture 6 0 0 3 9 7.6 Postprocedural rupture 0 0 0 1 1 0.8 Thromboembolism 1 1 7 4 13 11.0 Coil migration 1 0 0 1 2 1.7 Parent-vessel injury 2 0 0 0 2 1.7 Total 10 1 7 9 27 22.9 Reference Rate Johnston et al62 10% procedure-related adverse outcome rate in coiled unruptured aneurysms (adverse outcome not defined) Duke et al63 2.5% procedure-related neurologic deficit rate Johnston et al64 11% procedure-related adverse outcome rate Vanninen et al65 4% technique-related mortality rate Bavinzski et al66 2.2% procedure-related mortality, 4.4% procedure-related morbidity Solander et al21 13% procedure-related temporary neurologic complication rate Klein et al67 24% inadvertent vessel occlusion secondary to coiling, 10% stroke/TIA rate secondary to coiling procedure Eskridge et al68 23% procedure-related embolus rate Guglielmi et al69 4.8% procedure-related morbidity, 2.4% procedure-related mortality Murayama et al70 4.3% procedure-related neurologic morbidity for unruptured aneurysms Kuether et al2 9.1% procedure-related morbidity, 7.8% procedure-related mortality Raymond et al71 22% procedure-related neurologic complications, 3% procedure-related mortality McDougall et al72 10% procedure-related neurologic complications Byrne et al73 18% procedure-related neurologic complications, 4% procedure-related mortality Casasco et al74 4.2% procedure-related strokes, 7% procedure-related deaths Brilstra et al1 4% procedure-related permanent neurologic complications, 8.5% procedure-related temporary neurologic ischemic complications, 1.1% procedure-related mortality Soeda et al75 20% procedure-related ischemic event rate in coiling or unruptured aneurysms Vinuela et al6 8.9% procedure-related morbidity, 1.8% procedure-related mortality Klotzsch et al76 20% procedure-related neurologic complications Holley et al77 7.1% procedure-related neurologic morbidity Graves et al78 8% procedure-related stroke rate Pelz et al22 28% procedure-related neurologic thromboembolic rate (12% TIA rate, 17% stroke rate)
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