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PURPOSE: Drug-resistant epilepsy affects a substantial proportion (30-40 %) of patients with epilepsy, often necessitating video-electroencephalography (video-EEG) monitoring. In 2016, Sauro et al. introduced a set of measures aimed at improving the quality and safety indicators reported in video-EEG evaluations. This study aims to report our experience with the implementation of these measures. METHODS: We analyzed video-EEG data regarding quality and safty from a period spanning January 2016 to January 2018, involving a total of 101 patients monitored in our video-EEG unit. RESULTS: Among the patients included in the study, a definitive diagnosis was attainable for 92.1 %, with 36.6 % experiencing a change in diagnosis and 65.3 % undergoing a change in treatment as a result of the video-EEG evaluation. Additionally, the referral question was fully addressed in 60.4 % of admissions, and video-EEG was considered to be very useful or extremely useful in 66.4 % of cases. Adverse events were observed in 26.7 % of patients, with the most common being the progression of focal seizures to bilateral tonic-clonic seizures (11.9 %) and the occurrence of seizure clusters (5.9 %). CONCLUSION: Our findings support the implementation of Sauro et al.'s set of measures, as they provide valuable criteria for improving the reporting of video-EEG quality and safety indicators. However, challenges may arise due to variations in terminology across studies and the lack of standardized criteria for defining essential questions in video-EEG evaluations. Further research utilizing these measures is necessary to enhance their effectiveness and encourage consistent reporting of results from epilepsy monitoring units.
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Epilepsia , Indicadores de Qualidade em Assistência à Saúde , Humanos , Brasil , Gravação em Vídeo/métodos , Convulsões/diagnóstico , Convulsões/etiologia , Epilepsia/diagnóstico , Epilepsia/etiologia , Monitorização Fisiológica/métodos , Eletroencefalografia/métodosRESUMO
OBJECTIVE: To investigate the association between left epileptiform activity and language laterality indices (LI) in patients with right mesial temporal sclerosis (MTS). METHODS: Twenty-two patients with right MTS and 22 healthy subjects underwent fMRI scanning while performing a language task. LI was calculated in multiple regions of interest (ROI). Data on the presence of left epileptiform abnormalities were obtained during prolonged video-EEG monitoring. RESULTS: After correction for multiple comparisons, LI was reduced in the middle temporal gyrus in the left interictal epileptiform discharges (IED+) group, compared with the left IED- group (p < 0.05). SIGNIFICANCE: Using a responsive reading naming fMRI paradigm, right MTS patients who presented left temporal interictal epileptiform abnormalities on video-EEG showed decreased LI in the middle temporal gyrus, indicating decreased left middle temporal gyrus activation, increased right middle temporal gyrus activation or a combination of both, demonstrative of language network reorganization, specially in the MTG, in this patient population. PLAIN LANGUAGE SUMMARY: This research studied 22 patients with right mesial temporal sclerosis (a specific type of epilepsy) comparing them to 22 healthy individuals. Participants were asked to perform a language task while undergoing a special brain imaging technique (fMRI). The findings showed that patients with epilepsy displayed a change in the area of the brain typically responsible for language processing. This suggests that their brains may have adapted due to their condition, altering the way language is processed.
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Epilepsia do Lobo Temporal , Epilepsia , Esclerose Hipocampal , Humanos , Encéfalo , IdiomaRESUMO
OBJECTIVE: To compare memory outcomes after surgery for unilateral hippocampal sclerosis (HS)-associated epilepsy in patients with unilateral and bilateral ictal electrographic involvement. METHODS: We prospectively evaluated HS patients, aged 18-55 years and IQ ≥70. Left (L) and right (R) surgical groups underwent noninvasive video-EEG monitoring and Wada test. We classified patients as Ipsilateral if ictal EEG was restricted to the HS side, or Bilateral, if at least one seizure onset occurred contralaterally to the HS, or if ictal discharge evolved to the opposite temporal region. Patients who declined surgery served as controls. Memory was evaluated on two occasions with Rey Auditory-Verbal Learning Test and Rey Visual-Design Learning Test. Baseline neuropsychological test scores were compared between groups. Pre- and postoperative scores were compared within each group. Reliable change index Z-scores (RCI) were obtained using controls as references, and compared between surgical groups. RESULTS: We evaluated 64 patients. Patients were classified as: L-Ipsilateral (9), L-Bilateral (15), L-Control (9), R-Ipsilateral (10), R-Bilateral (9), and R-Control (12). On preoperative evaluation, memory performance did not differ among surgical groups. Right HS patients did not present postoperative memory decline. L-Ipsilateral group presented postoperative decline on immediate (P = 0.036) and delayed verbal recall (P = 0.011), while L-Bilateral did not decline. L-Ipsilateral had lower RCI Z-scores, indicating delayed verbal memory decline compared to L-Bilateral (P = 0.012). SIGNIFICANCE: Dominant HS patients with bilateral ictal involvement presented less pronounced postoperative verbal memory decline compared to patients with exclusive ipsilateral ictal activity. Surgery was indicated in these patients regardless of memory impairment on neuropsychological testing, since resection of the left sclerotic hippocampus could result in cessation of contralateral epileptiform activity, and, therefore, improved memory function.
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Epilepsia do Lobo Temporal , Esclerose Hipocampal , Humanos , Epilepsia do Lobo Temporal/cirurgia , Lobo Temporal/patologia , Lobo Temporal/cirurgia , Transtornos da Memória/etiologia , Transtornos da Memória/patologia , Eletroencefalografia , Esclerose/complicações , Esclerose/patologiaRESUMO
OBJECTIVES: To determine the incidence of seizure-like events in a cohort of infants born preterm as well as the prevalence of associated vital sign changes (heart rate [HR], respiratory rate, and pulse oximetry [SpO2]). STUDY DESIGN: We performed prospective conventional video electroencephalogram monitoring on infants born at 23-30 weeks of gestational age during the first 4 postnatal days. For detected seizure-like events, simultaneously captured vital sign data were analyzed during the pre-event baseline and during the event. Significant vital sign changes were defined as HR or respiratory rate >±2 SD from the infant's own baseline physiologic mean, derived from a 10-minute interval before the seizure-like event. Significant change in SpO2 was defined as oxygen desaturation during the event with a mean SpO2 <88%. RESULTS: Our sample included 48 infants with median gestational age of 28 weeks (IQR 26-29) and birth weight of 1125 g (IQR 963-1265). Twelve (25%) infants had seizure-like discharges with a total of 201 events; 83% (10/12) of infants had vital sign changes during these events, and 50% (6/12) had significant vital sign changes during the majority of the seizure-like events. Concurrent HR changes occurred the most frequently. CONCLUSIONS: Individual infant variability was observed in the prevalence of concurrent vital sign changes with electroencephalographic seizure-like events. Physiologic changes associated with preterm electrographic seizure-like events should be investigated further as a potential biomarker to assess the clinical significance of such events in the preterm population.
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Oximetria , Convulsões , Recém-Nascido , Humanos , Lactente , Estudos Prospectivos , Idade Gestacional , Convulsões/diagnóstico , Convulsões/epidemiologia , Peso ao Nascer , OxigênioRESUMO
PURPOSE: Self-limited epilepsy with centrotemporal spikes, formerly called benign epilepsy with centrotemporal spikes, or rolandic epilepsy, is an age-related and well-defined epileptic syndrome. Since seizures associated with rolandic spikes are infrequent and usually occur during sleep, and repetitive or prolonged EEG recording for diagnostic purposes is not necessary for diagnosis, reports of ictal video-electroencephalographic seizures in this syndrome are rare. We aimed to show ictal video-EEG of typical rolandic seizures. METHODS: We report the ictal video-EEG recordings of two children with rolandic epilepsy who presented typical rolandic seizures during routine recording. RESULTS: Case 1: A 9-year-old boy, with normal development, had his first seizure at 8 years old, characterized by paresthesia in his left face, blocking of speech, and drooling. Carbamazepine was started with seizure control. Case 2: A 10-year-old boy, with normal development, started with focal seizures during sleep, characterized by eye and perioral deviation, and speech arrest at age of 7. He started using oxcarbazepine. Both patients underwent routine electroencephalography for electroclinical diagnosis and presented a seizure. CONCLUSION: Although self-limited epilepsy with centrotemporal spikes is a very common epileptic syndrome, seizure visualization is very difficult, and these videos may bring didactical information for recognition of this usual presentation of benign childhood focal epilepsy.
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Eletroencefalografia , Epilepsia Rolândica , Carbamazepina/uso terapêutico , Criança , Documentação , Epilepsia Rolândica/complicações , Epilepsia Rolândica/diagnóstico , Epilepsia Rolândica/tratamento farmacológico , Humanos , Masculino , Convulsões/complicações , Convulsões/diagnósticoRESUMO
Desde la antigüedad se han descrito manifestaciones de religiosidad peri-ictal en epilepsia. Es frecuente la psicopatología asociada a epilepsia; entre otras manifestaciones, la psicosis asociada a epilepsia ha sido reportada aunque con menor frecuencia que la depresión y la ansiedad; en especial la psicosis postictal. El uso del monitoreo prolongado con Video- EEG en los últimos años ha permitido estudiar mejor estas manifestaciones. Presentamos un caso de epilepsia del lóbulo temporal farmacorresistente, con un episodio de psicosis postictal caracterizado por delusiones de contenido religioso. Se realizó un estudio detallado que incluyó resonancia de encéfalo y Video-EEG prolongado; revisamos la literatura y los mecanismos fisiopatogénicos propuestos para este fenómeno postictal.
Peri-ictal religious manifestations in epilepsy have been described since ancestral times. Psychopathology associated with epilepsy is frequent; among other manifestations, the psychosis associated with epilepsy has been reported, although less frequently than depression and anxiety; especially postictal psychosis. In recent years the use of prolonged monitoring with Video-EEG has allowed us to better study these manifestations. We present a case of drug-resistant temporal lobe epilepsy, with an episode of postictal psychosis characterized by religious delusions. A detailed study was performed that included brain imaging and prolonged Video-EEG. We review the literature and physiopathogenic mechanisms proposed for this postictal phenomenon.
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Las manifestaciones de religiosidad en epilepsia han sido descritas empíricamente desde la antigüedad. En los últimos 60 años con el uso del EEG y luego con la ayuda del Video-EEG se han estudiado mejor estas manifestaciones, en especial en su presentación peri-ictal. El signo de la cruz es un automatismo epiléptico muy infrecuente, con escasos reportes desde el 2009. Presentamos un caso de epilepsia del lóbulo temporal con este automatismo, con estudio detallado que incluyó el registro de la semiología por Video-EEG. Revisamos la literatura con el objetivo de entender los mecanismos fisiopatogénicos propuestos y conocer el valor localizador y/o lateralizador de este signo.
Religious manifestations in epilepsy have been described empirically since ancestral times. In the last 60 years with the use of the EEG and then with the help of the Video-EEG, these manifestations have been studied better, especially in their peri-ictal presentation. The Sign of the Cross is a very infrequent epileptic automatism, with few reports since 2009. We present a case of temporal lobe epilepsy with this automatism, with a detailed study that included the video-EEG recording of semiology. We review the literature with the objective of understanding the physiopathogenic mechanisms and know the localizing and / or lateralizing value of this sign.
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Neonatal seizures are common expression of acute brain injury in the perinatal period and could potentiate the degree of neuronal injury. The majority of events are electroencephalographic and the clinical seizures can be subtle and difficult to identify by medical personnel. Neonatal seizures are usually short and frequent at onset and have a tendency to subside after a short period. Continuous video-EEG monitoring is the gold standard to detect seizures, but amplitude integrated EEG is a useful tool when conventional EEG is not available. EEG monitoring is important not only to monitor frequency and duration of seizures but to provide important prognostic information.
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Eletroencefalografia , Monitorização Neurofisiológica/métodos , Convulsões/diagnóstico , Encéfalo/fisiopatologia , Humanos , Recém-Nascido , Convulsões/etiologia , Convulsões/fisiopatologiaRESUMO
Las convulsiones neonatales son una expresión común de lesiones cerebrales agudas durante el periodo perinatal y podrían incrementar el daño neuronal. La mayoría son electroencefalográficas y las clínicas pueden ser sutiles y difíciles de identificar por el personal médico. Las convulsiones neonatales son usualmente cortas pero frecuentes al inicio y tienden a desaparecer en un periodo corto. El video-EEG continuo es el test ideal para detectar estas convulsiones, pero el EEG de amplitud es útil cuando el EEG convencional no está disponible. El monitoreo con EEG no solo es necesario para evaluar la frecuencia y duración de estas convulsiones, también puede proporcionar información pronóstica importante.
Neonatal seizures are common expression of acute brain injury in the perinatal period and could potentiate the degree of neuronal injury. The majority of events are electroencephalographic and the clinical seizures can be subtle and difficult to identify by medical personnel. Neonatal seizures are usually short and frequent at onset and have a tendency to subside after a short period. Continuous video-EEG monitoring is the gold standard to detect seizures, but amplitude integrated EEG is a useful tool when conventional EEG is not available. EEG monitoring is important not only to monitor frequency and duration of seizures but to provide important prognostic information.
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Humanos , Recém-Nascido , Convulsões/diagnóstico , Eletroencefalografia , Monitorização Neurofisiológica/métodos , Convulsões/etiologia , Convulsões/fisiopatologia , Encéfalo/fisiopatologiaRESUMO
OBJECTIVE: To compare surgical outcome in mesial temporal lobe epilepsy (MTLE) patients with unilateral hippocampal sclerosis (MTLE-HS) who had or did not have preoperative video-electroencephalographic monitoring (VEEG). METHODS: A prospective study was undertaken with 166 consecutive pharmacoresistant unilateral MTLE-HS patients. All patients were investigated with detailed seizure semiology, serial routine outpatient EEG, magnetic resonance imaging, neuropsychological evaluation, and if necessary, other examinations. Postoperative follow-up ranged between 2 and 16 years. Patients were divided into: (1) patients operated on based on routine outpatient EEG information, with >80% of EEGs with unilateral interictal epileptiform discharges (IEDs) ipsilateral to HS or ictal events (n = 71); and (2) patients submitted to preoperative VEEG (n = 95). To avoid the bias generated by ictal recordings, we performed a subanalysis of: (1) patients without preoperatively ictal recordings (n = 80) and (2) patients with ictal recordings in VEEG or routine outpatient EEG (n = 86). RESULTS: Groups were similar regarding gender, age at surgery, seizure onset, preoperative seizure frequency, and duration of follow-up. Overall, 136/166 (81.92%) were classified as Engel I seizure outcome, with no difference between groups; 76.84% and 88.73% of patients with and without VEEG, respectively, had Engel I postoperative seizure outcome (P = .77). The time lag until surgery was shorter in the group without VEEG (80 vs 38 months; P = .01). Considering ictal recordings, 76.74% of patients with seizures recorded and 87.50% without ictal recordings had Engel I outcome (P = .11). SIGNIFICANCE: We performed the first prospective study in a tertiary epilepsy center comparing surgical outcomes in unilateral MTLE-HS patients investigated preoperatively with and without VEEG. Based on the surgical outcome, VEEG is not imperative in patients with unilateral MTLE-HS who have compatible semiology and clearly ipsilateralized IEDs evaluated by a multidisciplinary and experienced epilepsy group.
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Epilepsia Resistente a Medicamentos/cirurgia , Eletroencefalografia/métodos , Epilepsia do Lobo Temporal/cirurgia , Hipocampo/patologia , Hospitalização , Monitorização Fisiológica/métodos , Cuidados Pré-Operatórios/métodos , Adolescente , Adulto , Idoso , Estudos de Casos e Controles , Epilepsia Resistente a Medicamentos/diagnóstico por imagem , Epilepsia do Lobo Temporal/diagnóstico por imagem , Feminino , Seguimentos , Hipocampo/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Procedimentos Neurocirúrgicos , Estudos Prospectivos , Esclerose , Gravação em Vídeo , Adulto JovemRESUMO
PURPOSE: We compared the semiology of psychogenic nonepileptic seizures (PNES) between patients from the USA and Brazil. This international cross-cultural comparative study may expand understanding of PNES across the borders. METHODS: We retrospectively investigated all patients with PNES admitted to one epilepsy center in the USA and one in Brazil. We classified their seizures into four classes: generalized motor, akinetic, focal motor, and subjective symptoms. All patients were interviewed by an epileptologist in both countries and were administered psychological assessment measures, including questions about PNES risk factors. For the statistical analyses, we compared patients from the two nations. RESULTS: Eighty-nine patients (49 from the USA and 40 from Brazil) were studied. Patients from the two countries were not significantly different with regard to sex and age, but patients from Brazil had earlier age at onset (26years vs. 34years; P=0.004) and a significantly greater delay in diagnosis (9.9years vs. 5.6years; P=0.001). Some characteristics of PNES were different between the two groups; patients from the USA had generally more seizure types and more often reported subjective seizures (55% in the USA vs. 10% in Brazil; P=0.0001). Clinical and historical characteristics of the patients were not significantly different. CONCLUSION: Delay in diagnosis of PNES may represent a major factor in resource-limited countries. Large multicenter cross-cultural studies may reveal subtle but significant cross-cultural differences with respect to the semiological, clinical, and historical aspects of PNES; however, patients with PNES share more similarities than differences.
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Cultura , Convulsões/psicologia , Adulto , Idade de Início , Brasil , Comparação Transcultural , Eletroencefalografia/métodos , Feminino , Hospitalização , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Estados UnidosRESUMO
INTRODUCTION: Video-EEG has been used to characterize genetic generalized epilepsies (GGE). For best performance, sleep recording, photic stimulation, hyperventilation, and neuropsychological protocols are added to the monitoring. However, risks and benefits of these video-EEG protocols are not well established. The aim of this study was to analyze the efficacy and safety of a video-EEG neuropsychological protocol (VNPP) tailored for GGE and compare its value with that of routine EEG (R-EEG). METHODS: We reviewed the VNPP and R-EEG of patients with GGE. We considered confirmation of the clinical suspicion of a GGE syndrome and characterization of reflex traits as benefits; and falls, injuries, psychiatric and behavioral changes, generalized tonic-clonic (GTC) seizures, and status epilepticus (SE) as the main risks of the VNPP. RESULTS: The VNPPs of 113 patients were analyzed. The most common epileptic syndrome was juvenile myoclonic epilepsy (85.8%). The protocol confirmed a GGE syndrome in 97 patients and 62 had seizures. Sleep recording had a provocative effect in 51.2% of patients. The second task that showed highest efficacy was praxis (39.3%) followed by hyperventilation (31.3%). Among the risks, 1.8% had GTC seizures and another 1.8%, SE. Eighteen percent of patients had persistently normal R-EEG, 72.2% of them had discharges during VNPP. Generalized tonic-clonic seizures, myoclonic status epilepticus, and repeated seizures were the main risks of VNPP present in 6 (5.31%) patients while there were no complications during R-EEG. CONCLUSIONS: The VNPP in GGE is a useful tool in diagnosis and characterization of reflex traits, and is a safe procedure. Its use might preclude multiple R-EEG exams.
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Eletroencefalografia/métodos , Epilepsia Generalizada/diagnóstico , Epilepsia Generalizada/fisiopatologia , Gravação em Vídeo/métodos , Adolescente , Adulto , Idoso , Criança , Eletroencefalografia/normas , Epilepsia Generalizada/genética , Feminino , Humanos , Hiperventilação/diagnóstico , Hiperventilação/fisiopatologia , Masculino , Pessoa de Meia-Idade , Estimulação Luminosa/métodos , Sono/fisiologia , Resultado do Tratamento , Gravação em Vídeo/normas , Adulto JovemRESUMO
Anti-NMDA receptor encephalitis is a treatable autoimmune disease characterized by cognitive, motor and psychiatric features that primarily affects young adults and children. We present a case of a 7-year-old boy with asymmetrical (mainly right hemibody) and abnormal polymorphic movements without concomitant scalpictal EEG changes but had background slowing predominating over the left hemisphere. This report illustrates previous descriptions of asymmetric presentation of abnormal movements in pediatric anti-NMDA receptor encephalitis and emphasizes the importance of video-EEG interpreted within the overall clinical context, to differentiate epileptic from non-epileptic abnormal movements in patients with autoimmune encephalitis.
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Knowledge about health systems can promote implementation of more specific and strategic health practices for patients with psychogenic nonepileptic seizures (PNES). For this purpose, we surveyed the current management of PNES (standard medical care [SMC]) by Brazilian League Against Epilepsy members. Respondents reported diagnosing PNES with a mean frequency of 3patients/month. Video-EEG (vEEG) was considered the best method for the diagnosis. Respondents who have vEEG in their facilities refer to vEEG significantly more often than those who have no vEEG (p<0.001). Therefore, South and Southeast Brazil regions referred patients more frequently to vEEG than other regions (p=0.004). Psychotherapy was considered the most effective (92.2%) treatment option, followed by education (75%) and psychopharmacology (70.3%). There were no regional differences considering treatment. The study identified current national diagnostic and treatment practices across the country and identified relevant Brazilian regional differences.
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Transtornos Psicofisiológicos/terapia , Psicoterapia , Convulsões/terapia , Brasil , Eletroencefalografia/métodos , Humanos , Transtornos Psicofisiológicos/diagnóstico , Transtornos Psicofisiológicos/psicologia , Convulsões/diagnóstico , Convulsões/psicologia , Resultado do TratamentoRESUMO
AIM: To determine whether there is added benefit in detecting electrographic abnormalities from 16-24 hours of continuous video-EEG in adult medical/surgical ICU patients, compared to a 30-minute EEG. METHODS: This was a prospectively enroled non-randomized study of 130 consecutive ICU patients for whom EEG was requested. For 117 patients, a 30-minute EEG was requested for altered mental state and/or suspected seizures; 83 patients continued with continuous video-EEG for 16-24 hours and 34 patients had only the 30-minute EEG. For 13 patients with prior seizures, continuous video-EEG was requested and was carried out for 16-24 hours. We gathered EEG data prospectively, and reviewed the medical records retrospectively to assess the impact of continuous video-EEG. RESULTS: A total of 83 continuous video-EEG recordings were performed for 16-24 hours beyond 30 minutes of routine EEG. All were slow, and 34% showed epileptiform findings in the first 30 minutes, including 2% with seizures. Over 16-24 hours, 14% developed new or additional epileptiform abnormalities, including 6% with seizures. In 8%, treatment was changed based on continuous video-EEG. Among the 34 EEGs limited to 30 minutes, almost all were slow and 18% showed epileptiform activity, including 3% with seizures. Among the 13 patients with known seizures, continuous video-EEG was slow in all and 69% had epileptiform abnormalities in the first 30 minutes, including 31% with seizures. An additional 8% developed epileptiform abnormalities over 16-24 hours. In 46%, treatment was changed based on continuous video-EEG. CONCLUSION: This study indicates that if continuous video-EEG is not available, a 30-minute EEG in the ICU has a substantial diagnostic yield and will lead to the detection of the majority of epileptiform abnormalities. In a small percentage of patients, continuous video-EEG will lead to the detection of additional epileptiform abnormalities. In a sub-population, with a history of seizures prior to the initiation of EEG recording, the benefits of continuous video-EEG in monitoring seizure activity and influencing treatment may be greater.
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Encefalopatias/diagnóstico , Eletroencefalografia/métodos , Epilepsia/diagnóstico , Unidades de Terapia Intensiva , Monitorização Fisiológica/métodos , Gravação de Videoteipe/métodos , Adulto , Humanos , Estudos RetrospectivosRESUMO
AIM: To identify factors that influence diurnal and sleep/wake seizure timing in children undergoing tapered drug withdrawal in an epilepsy monitoring unit. METHODS: Medical charts of patients that underwent video-EEG were reviewed. Seizures were evaluated based on their occurrence in three-hour time intervals (bins) and between wakefulness and sleep. Patients were classified according to EEG localisation and age: infants (≤3 years), children (3-12 years), and adolescents (>12-21 years). Analysis utilising generalised estimating equations with a negative binomial distribution was performed. RESULTS: A total of 390 patients (188 girls; mean age: 9.2 years; SD: 6.0) had 1,754 seizures. Generalised seizures (109 patients; 490 seizures) occurred more during wakefulness (p<0.001) and during the day (p<0.001). Modelling revealed a greater occurrence of seizures at night with increasing age (p=0.046). Temporal lobe seizures (62 patients; 271 seizures) occurred overall more frequently during wakefulness (p=0.03). Frontal lobe seizures (41 patients; 184 seizures) occurred more frequently during wakefulness in infants (p<0.05) and more frequently during sleep in adolescents (p<0.0001). Adolescents with frontal lobe seizures were 3.6 times more likely to have seizures during sleep compared to other children (95% CI: 1.8-7.2). CONCLUSION: These findings are suggestive of changes in circadian rhythmicity that may alter seizure susceptibility in different age groups. The results may assist in prediction of periods of greatest seizure propensity.
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Lobo Frontal/fisiopatologia , Convulsões/fisiopatologia , Sono/fisiologia , Vigília/fisiologia , Adolescente , Fatores Etários , Criança , Ritmo Circadiano/fisiologia , Eletroencefalografia/métodos , Feminino , Humanos , Masculino , Adulto JovemRESUMO
Atonic seizures are epileptic attacks characterised by a sudden loss or diminution of muscle tone. Structures corresponding to inhibitory cortical areas, such as the primary negative motor area or the supplementary negative motor area, could be responsible. We present findings observed in a patient with atonic seizures due to focal epilepsy, who underwent intracranial video-EEG monitoring and epilepsy surgery, and discuss possible underlying mechanisms. [Published with video sequences].
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Eletroencefalografia/métodos , Epilepsias Parciais/fisiopatologia , Convulsões/fisiopatologia , Adulto , Epilepsias Parciais/cirurgia , Feminino , Humanos , Convulsões/cirurgia , Resultado do TratamentoRESUMO
Gastaut type idiopathic childhood occipital epilepsy is an uncommon epileptic syndrome characterised by frequent seizures, most commonly presenting as elementary visual hallucinations or blindness. Other occipital (non-visual) symptoms may also occur. Interictal EEG typically shows occipital paroxysms, often with fixation-off sensitivity. Ictal EEG is usually characterised by interruption by paroxysms and sudden appearance of low-voltage, occipital, fast rhythm and/or spikes. Despite well described clinical and EEG patterns, to our knowledge, there are very few reports in the literature with video-EEG recording of either seizure semiology or fixation-off phenomena. We present a video-EEG recording of a 12-year-old girl with Gastaut type epilepsy, illustrating the interictal and ictal aspects of this syndrome. Our aim was to demonstrate the clinical and neurophysiological pattern of a typical seizure of Gastaut type epilepsy, as well as the fixation-off phenomena, in order to further clarify the typical presentation of this syndrome. [Published with video sequences].
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Epilepsias Parciais/fisiopatologia , Lobo Occipital/fisiopatologia , Criança , Eletroencefalografia , Feminino , HumanosRESUMO
Continuous Vídeo-EEG monitoring remains the gold-standard tool to confirm or disregard the diagnosis of epilepsy in selected cases in which a differential diagnosis is required and not clearly established in the basis of outpatient procedures. However, it may be a tiresome and stressful experience for patients and it is certainly an expensive test. Thus, we wonder how far (considering both financial and emotional costs) should we pursue the goal of documenting all suspicious events. An illustrative case is presented.
Monitorização continua com Video-EEG permanece como método de eleição no diagnóstico de epilepsia, em casos selecionados onde o diagnóstico diferencial não pode ser perfeitamente definido com base em procedimentos ambulatoriais. Entretanto, a monitorização contínua pode constituir uma experiência cansativa e estressante para os pacientes, além de custo envolvido. Considerando estes custos (emocional e financeiro) é especulada a real necessidade da documentação de todos os eventos suspeitos. Um caso ilustrativo é apresentado.
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Humanos , Convulsões , Eletroencefalografia , EpilepsiaRESUMO
El diagnóstico de la epilepsia es fundamentalmente clínico, pero frecuentemente se plantea el diagnóstico diferencial con fenómenos no epilépticos. El desarrollo de la monitorización EEG continua (MEEGC) en las últimas dos décadas ha permitido mejorar el diagnóstico de pacientes epilépticos de todas las edades. En este trabajo se revisan los datos de la literatura sobre la eficacia de los distintos tipos de MEEGC en el diagnóstico de la epilepsia pediátrica, resaltando especialmente nuestra experiencia personal. En nuestros estudios, la MEEGC ambulatoria suplementada con video permitió contestar la pregunta que determinó su petición en el 80% de pacientes diagnosticados de epilepsia y en el 83% de aquéllos con sospecha diagnóstica de epilepsia. Con la MEEGC ambulatoria asistida por ordenador, dichas cifras fueron 88% y 89%, respectivamente y con la MEEGC intrahospitalaria con video fueron 82% y 51%, respectivamente. La MEEGC intrahospitalaria con video es crucial en la evaluación de pacientes con epilepsia, candidatos al tratamiento quirúrgico. La MEEGC es también importante en pacientes con encefalopatías agudas ingresados en las unidades de cuidados intensivos. La MEEGC, tanto ambulatoria como intrahospitalaria, es muy útil en el diagnóstico diferencial de fenómenos clínicos epilépticos y no epilépticos y en la confirmación del tipo de epilepsia o síndrome epiléptico. Los avances tecnológicos y el desarrollo de nuevas modalidades de EEG en el futuro, harán que la electroencefalografía siga siendo una técnica muy importante en el estudio de la función cerebral en pacientes con enfermedades neurológicas agudas o crónicas.
The diagnosis of epilepsy is basically clinical, but it frequently raises the differential diagnosis with non-epileptic events. The development of continuous EEG monitoring (CEEGM) in the past decades has allowed a better diagnosis of epileptic patients of all ages. In this paper we review the data available in the literature about the efficacy of the different modalities of CEEGM in the diagnosis of pediatric epilepsy, emphasizing our personal experience. In our studies the ambulatory CEEGM supplemented with video allowed to answer the question that prompted its request in 80% of patients diagnosed with epilepsy and in 83% of those with the suspected diagnosis of epilepsy. With ambulatory computer-assisted CEEGM those figures were 88% and 89%, respectively, and with inpatient video-CEEGM they were 82% and 51%, respectively. The latter is crucial in the evaluation of epilepsy patients who are candidates for surgical treatment. Inpatient video-CEEGM is also very important in the management of patients with acute encephalopathies admitted to the Intensive Care Units. Both, ambulatory or inpatient CEEGM, are very useful in the differential diagnosis of clinical epileptic versus non-epileptic events, as well as in the confirmation of the type of epilepsy or epileptic syndrome. The development of technological advances and new EEG modalities in the future will help to continue to consider electroencephalography as a very important technique in the study of brain function in patients with acute or chronic encephalopathies.