Geir Bråthen

EFNS guidelines for diagnosis, therapy and prevention of Wernicke encephalopathy.

Background:  Although Wernicke encephalopathy (WE) is a preventable and treatable disease it still often remains undiagnosed during life.

Headache prevalence related to smoking and alcohol use. The Head‐HUNT Study

The aim of this study was to examine a possible association between smoking, alcohol and headache in a large population‐based cross‐sectional study. A total of 51 383 subjects completed a headache questionnaire and constituted the ‘Head‐HUNT’ Study. Questionnaire‐based information on smoking was available in 95% and on alcohol in 89% of the individuals. Associations were assessed in multivariate analyses, estimating prevalence odds ratios (ORs) with 95% confidence intervals (CI). Prevalence rates for headache were higher amongst smokers compared with never smokers, most evident for those under 40 years smoking more than 10 cigarettes per day (OR 1.5, 95% CI 1.3–1.6). Passive smoking was also associated with higher headache prevalence. For alcohol use, there was a tendency of decreasing prevalence of migraine with increasing amounts of alcohol consumption compared with alcohol abstinence. Only with regard to symptoms indicating alcohol overuse, a positive association with frequent headache was found. The association between headache and smoking found in the present study raises questions about a causal relationship, e.g. that smoking causes headache or that it allays stress induced by headache. The observed negative association between migraine and alcohol consumption is probably explained by the headache precipitating properties of alcohol.

EFNS guideline on the diagnosis and management of alcohol‐related seizures: report of an EFNS task force

Despite being a considerable problem in neurological practice and responsible for one‐third of seizure‐related admissions, there is little consensus as to the optimal investigation and management of alcohol‐related seizures. The final literature search was undertaken in September 2004. Consensus recommendations are given graded according to the EFNS guidance regulations. To support the history taking, use of a structured questionnaire is recommended. When the drinking history is inconclusive, elevated values of carbohydrate‐deficient transferrin and/or gammaglutamyl transferase can support a clinical suspicion. A first epileptic seizure should prompt neuroimaging (CT or MRI). Before starting any carbohydrate containing fluids or food, patients presenting with suspected alcohol overuse should be given prophylactic thiamine parenterally. After an alcohol withdrawal seizure (AWS), the patient should be observed in hospital for at least 24 h and the severity of withdrawal symptoms needs to be followed. For patients with no history of withdrawal seizures and mild to moderate withdrawal symptoms, routine seizure preventive treatment is not necessary. Generally, benzodiazepines are efficacious and safe for primary and secondary seizure prevention; diazepam or, if available, lorazepam, is recommended. The efficacy of other drugs is insufficiently documented. Concerning long‐term recommendations for non‐alcohol dependant patients with partial epilepsy and controlled seizures, small amounts of alcohol may be safe. Alcohol‐related seizures require particular attention both in the diagnostic work‐up and treatment. Benzodiazepines should be chosen for the treatment and prevention of recurrent AWS.

A structured, nurse-led intervention program improves quality of life in patients with epilepsy: A randomized, controlled trial

We tested the hypothesis that structured epilepsy nursing improves quality of life (QOL). One hundred fourteen adult patients with uncontrolled epilepsy were randomly assigned to either an intervention group or a control group. The intervention group was offered an interactive, 1-day group education program followed by extended nurse follow-up and counseling. The nurse was present at as many outpatient consultations as possible and performed repeated consultations by telephone. All patients completed the QOLIE-89 before randomization and after 2 years. QOL was significantly improved from inclusion to completion of study in the intervention group (P=0.019), mainly in the subitems for Health Discouragement (P=0.01), Medication Effects (P=0.035), and Physical Role Limitations (P=0.05). To our knowledge, this is the first study to demonstrate a significant effect of a structured nurse-led intervention program in QOL of patients with epilepsy.

Weekday distribution of alcohol consumption in Norway: influence on the occurrence of epileptic seizures and stroke?

Binge drinking at weekends is considered to be a predominant feature of alcohol consumption in the Nordic countries. Neurological diseases, such as seizures and stroke, have been reported to occur in temporal relation to alcohol intoxication and withdrawal. We wanted to investigate weekday variances in alcohol consumption in relation to the onset of neurological symptoms in these disorders.

Lamotrigine and its N2-glucuronide during pregnancy: The significance of renal clearance and estradiol

PURPOSE To investigate the physiological mechanisms behind the pronounced decline of lamotrigine (LTG) serum concentrations during pregnancy. METHODS Serum and urine concentrations of LTG and its main metabolite, LTG-N2-glucuronide (LTG-GLUC), were measured monthly in 21 pregnancies of 19 women using LTG. Simultaneously, a panel of biochemical variables was monitored to evaluate liver and kidney function and possible hemodilution effects. Pharmacokinetic parameters were calculated once at baseline and once in gestational month 8. RESULTS Initially, LTG and LTG-GLUC serum concentrations fell simultaneously by 27% and 38%, respectively (gestational month 2). Subsequently, the ratio of the LTG-GLUC/LTG serum concentrations increased gradually, correlating strongly with rising serum estradiol concentrations. In gestational month 8, the ratio was 164% higher than at baseline. At that time, LTG total clearance had increased by 118%, and the amount of unchanged LTG in urine had dropped by 40% while the amount of LTG-GLUC had increased by a corresponding 37%. CONCLUSIONS The simultaneous decline of LTG and LTG-GLUC serum concentrations in early pregnancy suggests that in this phase, increased renal blood flow is the major cause. After gestational month 2, estradiol-induced glucuronidation of LTG becomes more important, leading to a further fall of LTG serum concentrations and a gradual rise of the LTG-GLUC/LTG-ratio through the remaining pregnancy. An expanded volume of distribution may also contribute to reduced LTG serum concentrations in pregnancy.

Clinical utility of EEG in alcohol-related seizures.

Objective– To study if electroencephalogram (EEG) can discriminate between alcohol‐related seizures (ARS) and seizures unrelated to alcohol use. Material and methods– Alcohol‐related seizures was defined as a seizure in a patient with score ≥ 8 in the Alcohol Use Disorders Identification Test (AUDIT). Twenty‐seven patients with ARS (22 without epilepsy: ARSwE), 21 AUDIT‐negative epileptic patients with seizures (ES), and 30 other AUDIT negative patients with seizures (OS) were studied. Thirty‐seven epilepsy outpatients and 79 sciatica inpatients were controls. Results– Epileptiform and slow activity were less frequent in the ARSwE than in the ES group. Alpha amplitude was lower in the ARSwE than the other groups. Photoparoxysmal activity was not observed. EEG was associated with a larger negative predictive value (78% probability of non‐ARS if EEG was abnormal) than a positive predictive value (55% probability of ARS if EEG was normal). Conclusion– A definitely abnormal EEG suggests epilepsy or symptomatic seizures unrelated to alcohol. The predictive value of a normal EEG is limited, but the typical post‐ictal finding in ARS is nevertheless a normal low‐amplitude EEG record.

Quantitative EEG findings in patients with acute, brief depression combined with other fluctuating psychiatric symptoms: a controlled study from an acute psychiatric department

BackgroundPatients with brief depressive episodes and concurrent rapidly fluctuating psychiatric symptoms do not fit current diagnostic criteria and they can be difficult to diagnose and treat in an acute psychiatric setting. We wanted to study whether these patients had signs of more epileptic or organic brain dysfunction than patients with depression without additional symptomatology.MethodsSixteen acutely admitted patients diagnosed with a brief depressive episode as well as another concurrent psychiatric diagnosis were included. Sixteen patients with major depression served as controls. Three electroencephalographic studies (EEG) were visually interpreted and the background activity was also analysed with quantitative electroencephalography (QEEG).ResultsThe group with brief depression and concurrent symptoms had multiple abnormal features in their standard EEG compared to patients with major depression, but they did not show significantly more epileptiform activity. They also had significantly higher temporal QEEG delta amplitude and interhemispheric temporal delta asymmetry.ConclusionOrganic brain dysfunction may be involved in the pathogenesis of patients with brief depressive episodes mixed with rapidly fluctuating psychiatric symptoms. This subgroup of depressed patients should be investigated further in order to clarify the pathophysiology and to establish the optimal evaluation scheme and treatment in an acute psychiatric setting.

An easily performed group education programme for patients with uncontrolled epilepsy—a pilot study

The factual knowledge of epilepsy is often insufficient among patients with this disorder. Compliance problems due to ignorance are common, and counselling is extremely important. We have developed a simple 1-day, low-cost group education programme for patients with epilepsy, intended to be suitable in routine care. The programme aims to help patients to achieve an improved understanding of the disorder and was carried out for a total of 54 consecutive patients with at least one seizure during the last year. This hospital-based 6-hour interactive course is organised by an epilepsy nurse and contains the following elements: basic knowledge about epilepsy, living with epilepsy, visit to the EEG lab, social security system and medical treatment. It was evaluated by means of a semi-structured interview and was found generally useful by all the participants. Sixty-five percent considered the sharing of experience with other patients to be the most valuable element. The ideal group size was found to be six to eight. Heterogeneity concerning age, sex and competence seemed to increase the interaction within the groups. This pilot study indicates that group education may be a useful approach in the clinic.

Alcohol withdrawal syndrome: mechanisms, manifestations, and management

The alcohol withdrawal syndrome is a well‐known condition occurring after intentional or unintentional abrupt cessation of heavy/constant drinking in patients suffering from alcohol use disorders (AUDs). AUDs are common in neurological departments with patients admitted for coma, epileptic seizures, dementia, polyneuropathy, and gait disturbances. Nonetheless, diagnosis and treatment are often delayed until dramatic symptoms occur. The purpose of this review is to increase the awareness of the early clinical manifestations of AWS and the appropriate identification and management of this important condition in a neurological setting.