Seizure Freedom (seizure + freedom)

Distribution by Scientific Domains


Selected Abstracts


Current Treatment of Myoclonic Astatic Epilepsy: Clinical Experience at the Children's Hospital of Philadelphia

EPILEPSIA, Issue 9 2007
Sudha Kilaru
Summary:,Purpose: Myoclonic astatic epilepsy (MAE) is a generalized epilepsy of early childhood. Little is known about the use of newer antiepileptic treatments (AET) in MAE. The purpose of this study was to describe the characteristics, treatment, and outcome of a contemporary MAE cohort exposed to the new generation AET. Methods: Charts of subjects with MAE treated between 1998 and 2005 were reviewed. Results: Twenty-three subjects (19 boys), with a median (range) follow-up of 38 (2, 86) months were identified. Thirty-nine percent had a family history of epilepsy, and 39% had family history of febrile seizures. Age at seizure onset was a median of 36 (12,24) months. Initial EEG was normal in 30%. When seizures ceased, EEG background and epileptiform abnormalities persisted in 17 and 58%, respectively. On average, each subject was exposed to five AET. The most frequently used AET was valproate (83%). Seizure freedom occurred spontaneously in three subjects, with ethosuximide and levetiracetam in one each, valproate and lamotrigine in two each, topiramate in three and the ketogenic diet (KD) in five subjects. By 36 months after seizure onset, 67% achieved seizure freedom. At the last visit, 43% were developmentally normal, 52% had mild, and 5% had moderate cognitive disabilities. Time to seizure freedom did not correlate with cognitive outcome. Conclusions: The new generation of AET may offer significant benefit to children with MAE. The KD was the most effective AET in this series, and perhaps should be considered earlier in treatment. [source]


Topiramate in Patients with Learning Disability and Refractory Epilepsy

EPILEPSIA, Issue 4 2002
Kevin Kelly
Summary: ,Purpose: Management of seizures in learning disabled people is challenging. This prospective study explored the efficacy and tolerability of adjunctive topiramate (TPM) in patients with learning disability and refractory epilepsy attending a single centre. Methods: Sixty-four patients (36 men, 28 women, aged 16,65 years) were begun on adjunctive TPM after a 3-month prospective baseline on unchanged medication. Efficacy end points were reached when a consistent response was achieved over a 6-month period at optimal TPM dosing. These were seizure freedom or ,50% seizure reduction (responder). Appetite, behaviour, alertness, and sleep were assessed by caregivers throughout the study. Results: Sixteen (25%) patients became seizure free with adjunctive TPM. There were 29 (45%) responders. A further 10 (16%) patients experiencing a more modest improvement in seizure control continued on treatment at the behest of their family and/or caregivers. TPM was discontinued in the remaining nine (14%) patients, mainly because of side effects. Final TPM doses and plasma concentrations varied widely among the efficacy outcome groups. Many patients responding well to adjunctive TPM did so on ,200 mg daily. Mean carer scores did not worsen with TPM therapy. Conclusions: TPM was effective as add-on therapy in learning-disabled people with difficult-to-control epilepsy. Seizure freedom is a realistic goal in this population. [source]


Topiramate in long-term treatment of epilepsy in the intellectually disabled

JOURNAL OF INTELLECTUAL DISABILITY RESEARCH, Issue 3 2005
M. Arvio
Abstract Background To study the effectiveness of topiramate (TPM) in refractory epilepsy in patients who have intellectual disability (ID). Methods A representative population sample of 57 patients with ID (age range 2,61, mean 32.8) was administered add-on TPM for drug-refractory epilepsy. Results Seizure freedom for at least for 6 months was attained by 10 (17%), and seizure reduction of ,,50% by further 26 (46%). Less than 50% decrease in seizure frequency was found in 16 (29%). TPM was more efficacious in localisation-related than in generalised epilepsies (81% vs. 50%, P = 0.019). An at least 50% decrease in seizure frequency was achieved by patients with temporal lobe epilepsy in 100%, continuous spike,waves during sleep syndrome in 75%, Lennox,Gastaut syndrome in 52%, and those with infantile spasms in 25% of cases. As great decrease in seizure frequency was found in most patients with cortical dysplasia (83%), acquired encephalopathy with mesial temporal sclerosis (MTS) (75%), and genetic disease associated with MTS (66%). Adverse effects occurred in 10% including two (3%) with seizure aggravation and three (5%) necessitating discontinuation. Conclusion TPM is an effective antiepileptic drug which is of value in treating people with seizures that are resistant to other antiepileptic medication. As a broad-spectrum drug it may substitute for polypharmacy and, at the same time decrease adverse effects and costs of therapy. [source]


Predicting seizure control: Cortical excitability and antiepileptic medication

ANNALS OF NEUROLOGY, Issue 1 2010
Radwa A. B. Badawy MBBCh
Objective Approximately 30% of patients with newly diagnosed epilepsy do not respond to antiepileptic drugs (AEDs), but this is not predictable. We used transcranial magnetic stimulation to determine the effect of AEDs on cortical excitability in patients with epilepsy and correlated this with a successful response to treatment. Methods Ninety-nine drug-naïve patients with newly diagnosed epilepsy (55 idiopathic generalized epilepsy, 44 focal epilepsy) were evaluated. Motor threshold and cortical excitability on recovery curve analysis were measured before and 4 to 16 weeks after starting medication. After 1 year of treatment, 43 of 55 idiopathic generalized epilepsy and 26 of 44 focal epilepsy patients were seizure free. Results A decrease in cortical excitability occurred in the seizure-free group as indicated by an increase in motor threshold (p < 0.05) and intracortical inhibition on recovery curve analysis, maximum at the 250-millisecond interstimulus interval (p < 0.01) compared with pretreatment values. These changes were not present in the group with ongoing seizures. Interpretation Seizure freedom is marked by a reduction in transcranial magnetic stimulation measures of cortical excitability, evident shortly after beginning therapy. This virtual normalization of cortical excitability occurred regardless of the seizure characteristics or AED used. Failure to show this response to AED treatment may be valuable as an early predictor of pharmacoresistance in individual patients. ANN NEUROL 2010;67:64,73 [source]


Idiopathic generalized epilepsies: a follow-up study in a single-center

ACTA NEUROLOGICA SCANDINAVICA, Issue 3 2010
E. Kharazmi
Kharazmi E, Peltola M, Fallah M, Keränen T, Peltola J. Idiopathic generalized epilepsies: a follow-up study in a single-center. Acta Neurol Scand: 122: 196,201. © 2009 The Authors Journal compilation © 2009 Blackwell Munksgaard. Objective,,, To characterize adult patients with idiopathic generalized epilepsies (IGEs) with precise evaluation and to assess factors related to refractoriness. Materials and methods,,, Hospital records of all our patients with IGEs (n = 128) were evaluated in 2005 and followed-up until 2008. Results,,, In 2005, 76% of patients were 1-year seizure-free. Seizure freedom increased to 82% during the 3-year follow-up. Seizure freedom was not significantly associated with age, age at diagnosis, epilepsy duration, exposure to inappropriate initial antiepileptic drug (AED), or delay time between starting initial AED and appropriate AED. Women constituted 78% of patients with merely provoked seizures. In 58% of women with recent seizure, one to two avoidable precipitating factors, such as lack of sleep, alcohol, and forgetting to take AED, were observed. In 2008, all patients with no medication, 91% of monotherapy patients, 60% of patients on two AED, and 14% of patients on three AED were seizure-free. Conclusions,,, Most of patients with IGEs can be successfully treated with monotherapy. Refractory seizures in some patients may be because of avoidable factors, especially in young women. [source]


Facial Emotion Recognition after Curative Nondominant Temporal Lobectomy in Patients with Mesial Temporal Sclerosis

EPILEPSIA, Issue 8 2006
Shearwood McClelland III
Summary:,Purpose: The right (nondominant) amygdala is crucial for processing facial emotion recognition (FER). Patients with temporal lobe epilepsy (TLE) associated with mesial temporal sclerosis (MTS) often incur right amygdalar damage, resulting in impaired FER if TLE onset occurred before age 6 years. Consequently, early right mesiotemporal insult has been hypothesized to impair plasticity, resulting in FER deficits, whereas damage after age 5 years results in no deficit. The authors performed this study to test this hypothesis in a uniformly seizure-free postsurgical population. Methods: Controls (n = 10), early-onset patients (n = 7), and late-onset patients (n = 5) were recruited. All patients had nondominant anteromedial temporal lobectomy (AMTL), Wada-confirmed left-hemisphere language dominance and memory support, MTS on both preoperative MRI and biopsy, and were Engel class I 5 years postoperatively. By using a standardized (Ekman and Friesen) human face series, subjects were asked to match the affect of one of two faces to that of a simultaneously presented target face. Target faces expressed fear, anger, or happiness. Results: Statistical analysis revealed that the early-onset group had significantly impaired FER (measured by percentage of faces correct) for fear (p = 0.036), whereas the FER of the late-onset group for fear was comparable to that of controls. FER for anger and happiness was comparable across all three groups. Conclusions: Despite seizure control/freedom after AMTL, early TLE onset continues to impair FER for frightened expressions (but not for angry or happy expression), whereas late TLE onset does not impair FER, with no indication that AMTL resulted in FER impairment. These results indicate that proper development of the right amygdala is necessary for optimal fear recognition, with other neural processes unable to compensate for early amygdalar damage. [source]


Electrical source imaging for presurgical focus localization in epilepsy patients with normal MRI

EPILEPSIA, Issue 4 2010
Verena Brodbeck
Summary Purpose:, Patients with magnetic resonance (MR),negative focal epilepsy (MRN-E) have less favorable surgical outcomes (between 40% and 70%) compared to those in whom an MRI lesion guides the site of surgical intervention (60,90%). Patients with extratemporal MRN-E have the worst outcome (around 50% chance of seizure freedom). We studied whether electroencephalography (EEG) source imaging (ESI) of interictal epileptic activity can contribute to the identification of the epileptic focus in patients with normal MRI. Methods:, We carried out ESI in 10 operated patients with nonlesional MRI and a postsurgical follow-up of at least 1 year. Five of the 10 patients had extratemporal lobe epilepsy. Evaluation comprised surface and intracranial EEG monitoring of ictal and interictal events, structural MRI, [18F]fluorodeoxyglucose positron emission tomography (FDG-PET), ictal and interictal perfusion single photon emission computed tomography (SPECT) scans. Eight of the 10 patients also underwent intracranial monitoring. Results:, ESI correctly localized the epileptic focus within the resection margins in 8 of 10 patients, 9 of whom experienced favorable postsurgical outcomes. Discussion:, The results highlight the diagnostic value of ESI and encourage broadening its application to patients with MRN-E. If the surface EEG contains fairly localized spikes, ESI contributes to the presurgical decision process. [source]


Temporal lobe epilepsy surgery and the quest for optimal extent of resection: A review

EPILEPSIA, Issue 8 2008
Johannes Schramm
Summary The efficacy of surgery to treat drug-resistant temporal lobe epilepsy (TLE) has been demonstrated in a prospective randomized trial. It remains controversial which resection method gives best results for seizure freedom and neuropsychological function. This review of 53 studies addressing extent of resection in surgery for TLE identified seven prospective studies of which four were randomized. There is considerable variability between the intended resection and the volumetrically assessed end result. Even leaving hippocampus or amygdalum behind can result in seizure freedom rates around 50%. Most authors found seizure outcome in selective amygdalohippocampectomy (SAH) to be similar to that of lobectomy and there is considerable evidence for better neuropsychological outcome in SAH. Studies varied in the relationship between extent of mesial resection and seizure freedom, most authors finding no positive correlation to larger mesial resection. Electrophysiological tailoring saw no benefit from larger resection in 6 of 10 studies. It must be concluded that class I evidence concerning seizure outcome related to type and extent of resection of mesial temporal lobe structures is rare. Many studies are only retrospective and do not use MRI volumetry. SAH appears to have similar seizure outcome and a better cognitive outcome than TLR. It remains unclear whether a larger mesial resection extent leads to better seizure outcome. [source]


Current Treatment of Myoclonic Astatic Epilepsy: Clinical Experience at the Children's Hospital of Philadelphia

EPILEPSIA, Issue 9 2007
Sudha Kilaru
Summary:,Purpose: Myoclonic astatic epilepsy (MAE) is a generalized epilepsy of early childhood. Little is known about the use of newer antiepileptic treatments (AET) in MAE. The purpose of this study was to describe the characteristics, treatment, and outcome of a contemporary MAE cohort exposed to the new generation AET. Methods: Charts of subjects with MAE treated between 1998 and 2005 were reviewed. Results: Twenty-three subjects (19 boys), with a median (range) follow-up of 38 (2, 86) months were identified. Thirty-nine percent had a family history of epilepsy, and 39% had family history of febrile seizures. Age at seizure onset was a median of 36 (12,24) months. Initial EEG was normal in 30%. When seizures ceased, EEG background and epileptiform abnormalities persisted in 17 and 58%, respectively. On average, each subject was exposed to five AET. The most frequently used AET was valproate (83%). Seizure freedom occurred spontaneously in three subjects, with ethosuximide and levetiracetam in one each, valproate and lamotrigine in two each, topiramate in three and the ketogenic diet (KD) in five subjects. By 36 months after seizure onset, 67% achieved seizure freedom. At the last visit, 43% were developmentally normal, 52% had mild, and 5% had moderate cognitive disabilities. Time to seizure freedom did not correlate with cognitive outcome. Conclusions: The new generation of AET may offer significant benefit to children with MAE. The KD was the most effective AET in this series, and perhaps should be considered earlier in treatment. [source]


Long-term Prognosis and Psychosocial Outcomes after Surgery for MTLE

EPILEPSIA, Issue 12 2006
Sophie Dupont
Summary:,Purpose: To assess the seizure-freedom rates and self-perceived psychosocial changes associated with the long-term outcome of epilepsy surgery in patients with refractory medial temporal lobe epilepsy associated with hippocampal sclerosis. Methods: A standard questionnaire was given to 183 patients who underwent surgery between 1988 and 2004, and 110 were completed. Results: The mean duration of follow-up after surgery was 7 years, with a maximum of 17 years. The probability that patients were seizure-free after surgery was dependent on the definition of the seizure freedom. For the patients who were seizure-free since surgery (Engel's class Ia), the probability was 97.6% at 1 year after surgery, 85.2% at 2 years after surgery, 59.5% at 5 years after surgery, and 42.6% at 10 years after surgery. For the patients who still experienced rare disabling seizures after surgery but were seizure-free at least 1 year before the time of assessment, the probability was of 97.6% at 1 year after surgery, 95% at 2 years after surgery, 82.8% at 5 years after surgery, and 71.1% at 10 years after surgery. The psychosocial long-term outcome, as measured by indices of driving, employment, familial and social relationships, and marital status, was similar to the psychosocial short-term outcome. It did not depend on seizure freedom or on follow-up time interval and was not influenced statistically by seizure frequency in cases of persisting seizures. Most but not all patients noticed a substantial overall improvement in their psychosocial condition; 48% drove (increased by 7%), 47% improved (14% worsened) in their employment status, and 68% improved (5% worsened) in their familial and social relationships. Overall, 91% of patients were satisfied with the surgery, and 92% did not regret their decision. Conclusions: The results of this study suggest that temporal lobe surgery has real long-term benefits. Two specific conclusions emerge: (a) the long-term rates of freedom from seizure depend on how seizure freedom is defined, and (b) the psychosocial long-term outcome does not change dramatically over years and does not depend on seizure freedom. [source]


Antiepileptic Drug Withdrawal after Successful Surgery for Intractable Temporal Lobe Epilepsy

EPILEPSIA, Issue 2 2005
Young Dae Kim
Summary:,Purpose: To investigate the prognosis related to antiepileptic drug (AED) discontinuation after successful surgery for intractable temporal lobe epilepsy. Methods: The clinical courses after temporal lobectomies (TLs) were retrospectively analyzed in 88 consecutive patients. All the patients had TLs as the only surgical procedure, and they had been followed up for longer than 3 years. AED discontinuation was attempted if the patient had been seizure free without aura for ,1 year during the follow-up period. Results: Sixty-six (75%) patients achieved complete seizure freedom for ,1 year; 28 patients were seizure free immediately after surgery (immediate success); and 38 patients became seizure free after some period of recurrent seizures (delayed success). AED discontinuation was attempted in 60 (91%) of 66 patients with a successful outcome. In 13 (22%) patients, seizure relapse developed during AED reduction (n = 60), and in seven (12%) patients after discontinuation of AEDs (n = 38). The seizure recurrence rate was not different between the immediate- and delayed-success groups. Among 20 patients with seizure relapse related to AED tapering, nine (45%) of them regained seizure freedom after reinstitution of AED treatment, and AEDs were eventually discontinued in six of them. Seizures that recurred after complete AED discontinuation had a better prognosis than did the seizures that recurred during AED reduction (seizure freedom in 86% vs. 23%). At the final assessment, 54 (61%) patients had been seizure free ,1 year; 37 without AEDs and 17 with AEDs. The successful discontinuation of AEDs was more frequent for patients with a younger age at the time of surgery and for those patients with shorter disease duration. Conclusions: Our results suggest that seizure freedom without aura at ,1 year is a reasonable indication for the attempt at AED discontinuation. The subsequent control of recurrent seizures was excellent, especially if seizures relapsed after the complete discontinuation of AEDs. Younger age at the time of surgery and a shorter disease duration seem to affect successful AED discontinuation for a long-term period. [source]


Topiramate in Patients with Learning Disability and Refractory Epilepsy

EPILEPSIA, Issue 4 2002
Kevin Kelly
Summary: ,Purpose: Management of seizures in learning disabled people is challenging. This prospective study explored the efficacy and tolerability of adjunctive topiramate (TPM) in patients with learning disability and refractory epilepsy attending a single centre. Methods: Sixty-four patients (36 men, 28 women, aged 16,65 years) were begun on adjunctive TPM after a 3-month prospective baseline on unchanged medication. Efficacy end points were reached when a consistent response was achieved over a 6-month period at optimal TPM dosing. These were seizure freedom or ,50% seizure reduction (responder). Appetite, behaviour, alertness, and sleep were assessed by caregivers throughout the study. Results: Sixteen (25%) patients became seizure free with adjunctive TPM. There were 29 (45%) responders. A further 10 (16%) patients experiencing a more modest improvement in seizure control continued on treatment at the behest of their family and/or caregivers. TPM was discontinued in the remaining nine (14%) patients, mainly because of side effects. Final TPM doses and plasma concentrations varied widely among the efficacy outcome groups. Many patients responding well to adjunctive TPM did so on ,200 mg daily. Mean carer scores did not worsen with TPM therapy. Conclusions: TPM was effective as add-on therapy in learning-disabled people with difficult-to-control epilepsy. Seizure freedom is a realistic goal in this population. [source]


Seizure Outcome after Temporal Lobectomy: Current Research Practice and Findings

EPILEPSIA, Issue 10 2001
A. M. McIntosh
Summary: ,Purpose: The literature regarding seizure outcome and prognostic factors for outcome after temporal lobectomy is often contradictory. This is problematic, as these data are the basis on which surgical decisions and counseling are founded. We sought to clarify inconsistencies in the literature by critically examining the methods and findings of recent research. Methods: A systematic review of the 126 articles concerning temporal lobectomy outcome published from 1991 was conducted. Results: Major methodologic issues in the literature were heterogeneous definitions of seizure outcome, a predominance of cross-sectional analyses (83% of studies), and relatively short follow-up in many studies. The range of seizure freedom was wide (33,93%; median, 70%); there was a tendency for better outcome in more recent studies. Of 63 factors analyzed, good outcome appeared to be associated with several factors including preoperative hippocampal sclerosis, anterior temporal localization of interictal epileptiform activity, absence of preoperative generalized seizures, and absence of seizures in the first postoperative week. A number of factors had no association with outcome (e.g., age at onset, preoperative seizure frequency, and extent of lateral resection). Conclusions: Apparently conflicting results in the literature may be explained by the methodologic issues identified here (e.g., sample size, selection criteria and method of analysis). To obtain a better understanding of patterns of long-term outcome, increased emphasis on longitudinal analytic methods is required. The systematic review of possible risk factors for seizure recurrence provides a basis for planning further research. [source]


Valproate in children with newly diagnosed idiopathic generalized epilepsy

ACTA NEUROLOGICA SCANDINAVICA, Issue 3 2010
K. D. Holland
Holland KD, Monahan S, Morita D, Vartzelis G, Glauser TA. Valproate in children with newly diagnosed idiopathic generalized epilepsy. Acta Neurol Scand: 2010: 121: 149,153. © 2009 The Authors Journal compilation © 2009 Blackwell Munksgaard. Objectives,,, Sparse information on dose,response characteristics for initial antiepileptic drug monotherapy in children with idiopathic generalized epilepsy (IGE) is available. The aim of this study is to characterize the therapeutic dose of valproate in children with newly diagnosed IGE. Materials and methods,,, Effect of initial valproate monotherapy and doses associated with seizure freedom were examined in consecutive children with IGE identified from a New Onset Seizure Clinic. Results,,, Of 84 patients identified, 48 (57%) became seizure-free on valproate monotherapy and another 10 patients became seizure-free but discontinued VPA because of adverse effects. The mean dose in seizure-free children was 15.7 mg/kg/day and over 95% of IGE patients will respond below 25 mg/kg/day. Conclusions,,, Half of children became seizure-free on valproate monotherapy and did so at modest doses. [source]


The intracarotid amobarbital or Wada test: unilateral or bilateral?

ACTA NEUROLOGICA SCANDINAVICA, Issue 3 2009
S. G. Uijl
Objective,,, In the Netherlands, presurgical screening for temporal lobe epilepsy (TLE) includes the intracarotid amobarbital procedure (IAP), consisting of two consecutive injections of amobarbital, ipsilateral and contralateral to the epileptic focus. We studied whether a bilateral IAP has added value to a unilateral, ipsilateral IAP. Methods,,, This population-based study included 183 consecutive patients referred for screening for TLE surgery who underwent bilateral IAP. Using multivariable modeling, we assessed the added value of bilateral IAP on the decision for surgery, resection size, amygdalohippocampectomy, post-operative seizure freedom, memory performance, and IQ change. Results,,, Given the results from the unilateral IAP, the bilateral IAP had added prognostic value for postoperative change in verbal memory (P < 0.01) and verbal IQ (P < 0.01), especially if patients had a left-sided focus. In contrast, information provided by the contralateral IAP was not associated with decision-making or surgical strategy. Conclusions,,, A bilateral IAP has added value in predicting post-operative verbal memory and IQ. A bilateral IAP is currently not used to guide surgical strategy, but may be used for this purpose when verbal capacity is of particular concern in patients with a left-sided focus. In other cases, IAP is best performed unilaterally. [source]


Long-term safety and efficacy of zonisamide in patients with refractory partial-onset epilepsy

ACTA NEUROLOGICA SCANDINAVICA, Issue 2 2008
S. J. Wroe
Objectives,,, To investigate whether zonisamide remains effective and well tolerated in the treatment of refractory partial epilepsy during long-term treatment and with flexible dosing in clinical practice. Materials and methods,,, Patients with refractory partial epilepsy who completed a fixed-dose, randomized, double-blind clinical trial were recruited in an open-label extension study with adjustment of zonisamide and other antiepileptic drug dosage according to the treating physician's usual clinical practice. Results,,, An intention-to-treat analysis of 317 patients showed that zonisamide was well tolerated with a predictable safety profile. Patient retention rates at 1, 2 and 3 years were 65.3%, 44.5% and 28.8%, respectively. Zonisamide treatment was associated with a maintained reduction in seizure frequency, with some patients achieving prolonged periods of seizure freedom. Conclusions,,, Flexible dosing with zonisamide demonstrated a good safety profile and sustained efficacy in the long-term adjunctive treatment of refractory partial epilepsy. [source]


Comparison of the efficacy and tolerability of new antiepileptic drugs: what can we learn from long-term studies?

ACTA NEUROLOGICA SCANDINAVICA, Issue 3 2006
G. Zaccara
Objective,,, A review of long-term open-label studies was performed with the aim of detecting differences in efficacy and/or tolerability of new antiepileptic drugs (AEDs). Methods,,, From more than 500 open studies conducted to evaluate the efficacy and tolerability of gabapentin (GBP), lamotrigine (LTG), levetiracetam (LEV), oxcarbazepine (OXC), pregabalin (PGB), tiagabine (TGB), topiramate (TPM) or zonisamide (ZNS), we selected all studies that reported or allowed us to calculate the number of patients who achieved seizure freedom for 6 months and/or the number of patients withdrawing for adverse effects and/or the number or percentage of patients continuing treatment after 1 year. Results,,, No studies were found in which this information was available for OXC, PGB, TGB or ZNS. The number of patients who achieved seizure freedom for 6 months was reported in four studies each for GBP and TPM, five studies for LTG, and eight studies for LEV. The best efficacy profile using this end point was found for LEV, followed by TPM, LTG, and GBP. Twenty-two studies reported the number of patients withdrawing due to adverse effects. LEV was the best-tolerated AED, a little ahead of LTG, and significantly better than GBP or TPM . TPM was by far the least well-tolerated drug. Information concerning patients continuing treatment after 1 year was reported in two GBP studies, two TPM studies, six LEV studies and five LTG studies. GBP had a very low retention rate (between 20% and 25% of patients continued the drug), while TPM and LTG had a retention rate of 40,60% and LEV had a retention rate of 60,75%. Conclusion,,, One limitation of these rankings is that their statistical value is limited because of the indirect nature of the comparisons. Anyhow, this review covers the main studies published thus far on this subject and provides full updated information on the current literature about these drugs. [source]


Valproic acid blood genomic expression patterns in children with epilepsy , a pilot study

ACTA NEUROLOGICA SCANDINAVICA, Issue 3 2004
Y. Tang
Objective , Valproic acid (VPA) is a commonly used anticonvulsant with multiple systemic effects. The purpose of this pilot study is to examine the blood genomic expression pattern associated with VPA therapy in general and secondly VPA efficacy in children with epilepsy. Materials and methods , Using oligonucleotide microarrays, gene expression in whole blood was assessed in pediatric epilepsy patients following treatment with VPA compared with children with epilepsy prior to initiation of anticonvulsant therapy (drug free patients). Results , The expression of 461 genes was altered in VPA patients (n = 11) compared with drug free patients (n = 7), among which a significant number of serine threonine kinases were down-regulated. Expression patterns in children seizure free on VPA therapy (n = 8) demonstrated 434 up-regulated genes, many in mitochondria, compared with VPA children with continuing seizures (n = 3) and drug free seizure patients (n = 7). Conclusion , VPA therapy is associated with two significant and unique blood gene expression patterns: chronic VPA monotherapy in general and a separate blood genomic profile correlated with seizure freedom. These expression patterns provide new insight into previously undetected mechanisms of VPA anticonvulsant activity. [source]


Prognostic factors in the surgical treatment of medically intractable epilepsy associated with mesial temporal sclerosis

ACTA NEUROLOGICA SCANDINAVICA, Issue 6 2001
M. J. Hennessy
Objectives, To assess the prognostic factors determining seizure remission after temporal lobectomy for intractable epilepsy associated with mesial temporal sclerosis (MTS) at pathology. Methods, The clinical and investigative features of 116 consecutive patients who had temporal lobe surgery for drug-resistant epilepsy and MTS at pathology were assessed using actuarial statistics and logistic regression analysis. Results, At a median follow-up of 63 months the probability of achieving at least a 1-year period of continuous seizure freedom was 67%. Factors contributing to a favourable outcome were interictal EEG localization to the operated lobe and the absence of secondarily generalized seizures. These were also selected in the multivariate analysis, although at lower statistical significance (P=0.08 and 0.09, respectively). Perinatal complications were associated with a significantly worse outcome but overall, complicated febrile convulsions and congruent neuropsychological deficits were not significantly predictive variables. Conclusions, The present findings may aid in the non-invasive presurgical assessment of patients with intractable TLE and clinical and neuroimaging evidence of MTS. [source]