Oclusión espontánea de malformación arteriovenosa cerebral parcialmente embolizada: reporte de dos casos

Torrico, T. Alejandro; Tevah, C. José

doi:10.1590/s0004-282x2006000400032

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Ahmad et al 13 reported one case occluded after 70% occlusion of the nidus in 2 sessions. Kocur et al 14 and Torrico et al 15 each reported 2 cases after being embolized with onyx. Viñuela et al 16 reported 2 cases after the use Isobutyl-2-Cyanoacrylate.…”

Section: Discussionmentioning

confidence: 99%

Angiographic predictors of spontaneous obliteration of transarterial partially embolized brain arteriovenous malformations

2022

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Background Spontaneous obliteration of cerebral arteriovenous malformations is uncommon but could occur after partial embolization. Methods A retrospective study of 140 patients that underwent embolization for cerebral AVMs from 2005 to August 2019 using liquid embolic agents. The angiographic outcome of patients was classified as regard complete embolization, partial embolization, and complete obliteration after partial embolization. The parameters studied included size, location, number of arterial feeders, number of draining veins, rupture status, embolic agent, and patient factors as well. Results The study patients included 74 (53%) females and 66 (47%) males. Their age ranged from 7 to 43 years old. One hundred and eight patients (77%) presented with hemorrhage. The AVM grades were grade II in 57 (40.7%) patients and grade III in 56 (39.3%) patients. Sixty-one (43.57%) patients were treated by n-Butyl Cyanoacrylate and 71 (50.71%) patients were treated with Onyx, and both materials were used together in 8 cases. Follow-up angiography was done from 6 to 36 months after embolization. The rate of complete occlusion in all patients was 61.43% (86 patients). There were three groups of patients, the first group had complete occlusion of the nidus at the time of embolization and included 68 (48.57%) patients. The second group had partial embolization with partial occlusion of the nidus 54 patients (38.57%). The 3rd group included 18 patients (12.85%) with complete nidal occlusion on follow up after partial embolization. The delay in the venous drainage of the AVM to the late arterial phase or early venous phase with flow stasis was a significant predictor of future obliteration on follow up after partial embolization. Other significant parameters that were associated with the progressive disappearance of the AVM nidus on follow up after partial embolization are presentation with hemorrhage, AVMs size less than 3 cm, the presence of single draining or double draining veins, superficial venous drainage, and one or 2 arterial feeders. Conclusion Spontaneous closure of intracranial arteriovenous malformations after partial embolization may be encountered in cases of stasis of flow during embolization procedure with a delay of the venous drainage. A long-term follow-up of more cases over many years is required to confirm the validity of this conclusion.

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Section: Discussionmentioning

confidence: 99%

Angiographic predictors of spontaneous obliteration of transarterial partially embolized brain arteriovenous malformations

2022

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Angioarchitecture and clinical presentation of brain arteriovenous malformations

Santos

Júnior²,

Matos

et al. 2009

Arq. Neuro-Psiquiatr.

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-The purpose of this study was to correlate the angioarchitecture of brain arteriovenous malformations (AVM) with their clinical presentation. A total of 170 patients with AVM 78 males and 92 females, were studied. Univariate and multivariate analyses were conducted in order to test the associations between morphological features and clinical presentation. The most frequent clinical presentations at diagnosis were hemorrhage in 89 (52%) patients, headache in 79 (46%), focal neurological deficit in 54 (32%), and seizure in 52 (31%). According to the Spetzler-Martin classification, grade I was found in 15 patients, II in 49, III in 55, IV in 41, and grade V in 10 patients. AVM with small nidus size, single feeding artery and single draining vein were associated with hemorrhage. Hemorrhage was positively associated with Spetzler-Martin grade I and negatively with grade V. The association between seizure and large nidus size was positive, however negative with small nidus size.Key wordS: brain arteriovenous malformations, angioarchitectural features, clinical presentation. Angioarquitetura e apresentação clínica de malformações arteriovenosas encefálicasResumo -o objetivo deste estudo foi correlacionar a angioarquitetura de malformações arteriovenosas encefálicas (MAV) com sua apresentação clínica. Foram estudados 170 pacientes portadores de MAV, sendo 78 do sexo feminino e 92 do masculino. Análises univariada e multivariada foram efetuadas para testar associações entre características morfológicas e quadro clínico. As principais formas de apresentação clínica no momento do diagnóstico incluíram hemorragia em 89 (52%) pacientes, cefaléia em 79 (46%), déficit focal em 54 (32%) e convulsão em 52 (31%). de acordo com a classificação de Spetzler e Martin, 15 pacientes tinham MAV grau I, 49 grau II, 55 grau III, 41 grau IV, e 10 grau V. MAV com nidus de tamanho pequeno, aferência e eferência únicas foram associados à hemorragia. Hemorragia foi positivamente associada com grau I e negativamente com grau V. A associação entre convulsão e nidus de tamanho grande foi positiva, porém negativa com nidus de tamanho pequeno.PAlAVrAS-cHAVe: malformações arteriovenosas encefálicas, angioarquitetura, apresentação clínica. of AVMs remains incompletely elucidated and its treatment is still a challenge to neurosurgeons. The purpose of this study was to morphologically characterize a series of brain arteriovenous malformations, trying to establish a correlation with their clinical presentation. METHODone hundred and seventy patients with brain AVMs, admitted at the Vascular and endovascular Neurosurgery Unit of Hospital de Base at São José do rio Preto, São Paulo, Brazil, were studied between January, 2001, and January, 2007. Seventy-eight (46%) were male and 92 (54%) female, and age ranged from 1 to 77 years (34.1±15 years) at presentation.This study was approved by the research ethics committee of the São José do rio Preto Medical School (FAMerP).other types of vascular malformations such as dural fistula, carotid-cavernous ...

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Oclusión espontánea de malformación arteriovenosa cerebral parcialmente embolizada: reporte de dos casos

Cited by 2 publications

References 13 publications

Angiographic predictors of spontaneous obliteration of transarterial partially embolized brain arteriovenous malformations

Angiographic predictors of spontaneous obliteration of transarterial partially embolized brain arteriovenous malformations

Angioarchitecture and clinical presentation of brain arteriovenous malformations

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