Gonzague Guillaumet1, Eimad Shotar2, Frédéric Clarençon2, Nader-Antoine Sourour2, Kevin Premat2, Stéphanie Lenck2, Sophie Dupont3, Alice Jacquens4, Vincent Degos4, Tom Boeken5,6, Aurélien Nouet1, Alexandre Carpentier1, Bertrand Mathon7,8. 1. Department of Neurosurgery, AP-HP, La Pitié-Salpêtrière Hospital, Sorbonne University, Paris, 75013, France. 2. Department of Neuroradiology, AP-HP, La Pitié-Salpêtrière Hospital, Sorbonne University, Paris, France. 3. Epileptology Unit, Department of Rehabilitation, AP-HP, La Pitié-Salpêtrière Hospital, Sorbonne University, Paris, France. 4. Department of Neurosurgical Anesthesiology and Critical Care, AP-HP, La Pitié Salpêtrière Hospital, Sorbonne University, Paris, France. 5. Department of Vascular and Oncological Interventional Radiology, AP-HP, Centre, Hôpital Européen Georges-Pompidou, 75015, Paris, France. 6. Université de Paris, 75006, Paris, France. 7. Department of Neurosurgery, AP-HP, La Pitié-Salpêtrière Hospital, Sorbonne University, Paris, 75013, France. bertrand.mathon@aphp.fr. 8. ICM, INSERM U 1127, CNRS UMR 7225, UMRS 1127, Paris Brain Institute, Sorbonne University, 75013, Paris, France. bertrand.mathon@aphp.fr.
Abstract
BACKGROUND: Little is known about incidence, time of onset, clinical presentation, and risk factors of epileptic seizure following brain arteriovenous malformation (bAVM) rupture. METHODS: We performed a monocentric retrospective cohort study from January 2003 to March 2021. The main objective of this study was to determine the incidence of seizures after spontaneous bAVM rupture in nonepileptic adult patients and describe the corresponding clinical features. The secondary objective was to identify clinical, radiological, or biological predictors for the occurrence of de novo seizures after bAVM rupture. RESULTS: Of the 296 cases of bAVM rupture registered during the study period, 247 nonepileptic patients (male 53%, median age 40) were included in the study. Fifty-nine patients (23.9%) had at least one seizure after bAVM rupture. The use of preventive antiepileptic drugs (10.3 [1.5-74.1]; P = 0.02) and decompressive craniectomy (15.4 [2.0-125]; P < 0.009) were independently associated with the occurrence of epilepsy after the bAVM rupture. The factors independently associated with the absence of any seizure after the rupture were isolated intraventricular hemorrhage (0.3 [0.1-0.99]; P = 0.04) and infratentorial location of the bAVM (0.2 [0.1-0.5]; P = 0.09). The first seizure occurred within the first year or within 5 years in, respectively, 83.1% and 98.3% of the patients. CONCLUSIONS: Epilepsy affects nearly a quarter of patients after bAVM rupture. Decompressive craniectomy represents an independent risk factor significantly associated with the occurrence of epilepsy after bAVM rupture. The introduction of preventive AEDs after rupture could be considered in these most severe patients who have a decompressive craniectomy.
BACKGROUND: Little is known about incidence, time of onset, clinical presentation, and risk factors of epileptic seizure following brain arteriovenous malformation (bAVM) rupture. METHODS: We performed a monocentric retrospective cohort study from January 2003 to March 2021. The main objective of this study was to determine the incidence of seizures after spontaneous bAVM rupture in nonepileptic adult patients and describe the corresponding clinical features. The secondary objective was to identify clinical, radiological, or biological predictors for the occurrence of de novo seizures after bAVM rupture. RESULTS: Of the 296 cases of bAVM rupture registered during the study period, 247 nonepileptic patients (male 53%, median age 40) were included in the study. Fifty-nine patients (23.9%) had at least one seizure after bAVM rupture. The use of preventive antiepileptic drugs (10.3 [1.5-74.1]; P = 0.02) and decompressive craniectomy (15.4 [2.0-125]; P < 0.009) were independently associated with the occurrence of epilepsy after the bAVM rupture. The factors independently associated with the absence of any seizure after the rupture were isolated intraventricular hemorrhage (0.3 [0.1-0.99]; P = 0.04) and infratentorial location of the bAVM (0.2 [0.1-0.5]; P = 0.09). The first seizure occurred within the first year or within 5 years in, respectively, 83.1% and 98.3% of the patients. CONCLUSIONS: Epilepsy affects nearly a quarter of patients after bAVM rupture. Decompressive craniectomy represents an independent risk factor significantly associated with the occurrence of epilepsy after bAVM rupture. The introduction of preventive AEDs after rupture could be considered in these most severe patients who have a decompressive craniectomy.
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