Clinical Neuroscience

[Non-contrast brain ct based systemic thrombolysis of two wake up ischemic stroke patients in rural settings]

POZSEGOVITS Krisztián, RENCZ László, CSÚSZ Lajos, SZABÓ Géza

MAY 30, 2017

Clinical Neuroscience - 2017;70(05-06)


[Background and presentation - Conventionally the acute ischemic stroke patients who wake up with symptomes (WUS - wake up stroke) cannot benefit from systemic thrombolysis due to the uncertainty of the exact onset time of the cerebrovascular event. Perfusion brain imaging could be used as patient selection tool but the method is not available in many settings. Simple non-contrast CT scan is easily accessible and reliable as it shows the different stages of the evolving ischemia with high accuracy. Early brain CT scan results of WUS patients have the same characteristics as the ones who are surely within therapeutic window. The intravenous thrombolysis with recombinant tissue plasminogen activator (rTPA) of WUS patients seems to be similarly successful as the ones with known onset time, the treatment does not come with excess complications, higher rate of symptomatic intracranial hemorrhage was not found in previous reports. Purpose - In this report we present two systemic thrombolysis cases of acute ischemic stroke patients who woke up with stroke symptoms. Methods - In 2014 and 2015 we performed systemic thrombolysis for one wake up stroke patients, respectively. Both patients had large vessel occlusion. Indication was based on favourable non-contrast brain CT scan results. Results - Treatment of these two patients with rTPA proved to be safe, no hemorrhage occurred after treatment. Conclusion - We presented two acute ischemic stroke patients with symptomes at early wake up who were treated intravenously with recombinant tissue plasminogen activator based on non-contrast CT alone without complications and some moderate improvement at 90 days in the settings of a rural town hospital in a middle income country.]



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Clinical Neuroscience

[Prevention of invasive meningococcal infection, recognition and first treatment of the disease in primary care]


[Neisseria meningitidis, the meningococcus, is a Gram-negative diplococcal bacterium that is only found naturally in humans. The meningococcus is part of the normal microbiota of the human nasopharynx and is commonly carried in healthy individuals. In some cases systemic invasion occurs, which can lead to meningitis and/or septicemia. Invasive disease caused by Neisseria meningitidis is potentially devastating, with a high case fatality rate and high rates of significant sequelae among survivors after septicaemia or meningitis. Between 2006-2015 every year between 34 and 70 were the numbers of the registered invasive disease because of Neisseria meningitis, the morbidity rate was 0.2-0.7⁰⁄₀₀₀₀. Half of the diseases (50.7%) were caused by B serotype N. meningitidis, 23.2% were C serotype. In this article the authors summarise what you must do and must not do as primary care physician when suddenly meeting a young patients suspected of having meningococcus infection. ]

Clinical Neuroscience

[EEG-based cerebral networks in 14 neurological disorders]

DÖMÖTÖR Johanna, CLEMENS Béla, CSÉPÁNY Tünde, EMRI Miklós, FOGARASI András, HOLLÓDY Katalin, PUSKÁS Szilvia, FEKETE Klára, KOVÁCS Attila, FEKETE István

[Background - Brain networks have not been systematically investigated yet in most neurological disorders. Purpose - To investigate EEG functional connectivity (EEGfC) networks in 14 neurological disorders. Patients - Potentially eligible patients were collected from clinical and EEG databases. All the available clinical data and EEG records were critically revised. All the patients who suffered of a single neurological disorder (out of the 14) and had a good quality EEG recording entered the study. Confoundig factors as comorbidity and CNS-active drug effects were eliminated as far as possible. EEG analysis - Three minutes of resting-state, waking EEG activity were selected for analysis. Current source density (CSD) values were computed for 2394 cortical voxels by Low Resolution Electromagnetic Tomography (LORETA). Thereafter, Pearson correlation coefficients were computed between all pairs of 23 cortical regions of interest (ROI) in each hemisphere (LORETA Source Correlation, LSC software). Computation was carried out for conventional EEG broad bands and very narrow bands (1 Hz bandwidth) between 1 and 25 Hz as well. Correlation coefficients of each group were statistically compared to our normative EEG (LSC) database by two-talied t-tests. Bonferroni-corrected p<0.05 values were accepted as statistically significant, and were graphically displayed as topographical networks. Results and conclusion - Group-specific networks were demonstrated. However, non-specific networks, charasteristic for most groups, were detected as well. Common finding were: decreased connectivity in the alpha band and increased connectivity in the delta, theta bands and upper-beta band. Decreased alpha-band connectivity presumably reflected primary lesional effects and on the other hand, non-specific vulnerability of “rich club connections”. Increased connectivity in the slow bands presumably indicated adaptive-compensatory activity of brain homeostasis. ]

Clinical Neuroscience

[Relationship between the number of hours of sunshine and the number of (violent) suicides in Hungary]

BOZSONYI Károly, ZONDA Tamás, FÜLÖP Andrea, BÁLINT Lajos

[Aim - Studying the impact of the sunshine on the numbers of suicides. The number of suicides is highest in the late spring and early summer months, while it is lowest in the cold, gloomy winter. Although the exact causes are still un-known, there are some theories about this phenomenon. A number of studies conducted in recent years have conclud-ed that the rise in suicide rate during the warm months might be due to an increased exposure to sunlight, especially in the cases of the violent method. We studied the validity of this hypothesis on a large Hungarian database. Methods and subjects - We analyzed the number of monthly hours of sunshine and the number of suicides by sex and by violent vs. non-violent method over a 360-month period. Our sample consisted of 127 877 committed suicides between 1971 and 2000. The parabolic trend of seasonality had to be removed from the suicide time series, then regression analysis was conducted on the seasonally adjusted data. Results - Our analysis revealed that in Hungary there was no statistically significant direct relationship between the number of hours of sunshine and the number of suicides. Moreover, there was no correlation between the hours of sunshine and the number of violent suicides either. Conclusion - If the above claim were confirmed in subsequent research, it would mean that our current therapeutic regime should be reconsidered during the spring-summer seasons.]

Clinical Neuroscience

[Experience with natalizumab-treatment at Semmelweis University]

GOMBOS Barbara, ILJICSOV Anna, BARSI Péter, HEGEDÛS Katalin, SIMÓ Magdolna

[Multiple sclerosis is an autoimmune demyelinating disorder of the central nervous system. During the last two decades, numerous disease modifying drugs have been introduced for the treatment of the relapsing-remitting form of the disease. Since 2010, natalizumab (NTZ) treatment has been used as a second-line therapy for patients with breakthrough disease. In comparison to conventional immunomodulant drugs, NTZ has a more specific effect in that it prevents the entry of immune cells into the central nervous system without interfering with systemic immune response. The efficacy and the safety of NTZ have been confirmed by several studies. The most severe side-effect of NTZ is progressive multifocal leukoencephalopathy, which has been associated with an increased incidence in patients with anti-JCV antibody positivity, and in those who have been undergoing NTZ treatment for over two years and who have received prior immunosuppressive therapy. In the present study, our experience with natalizumab treatment of 37 patients at the Department of Neurology of Semmelweis University during the last 6 years is presented. We have observed a significant decrease of disease activity in our patients; in many cases the disease has become inactive both clinically (36/37) and radiologically (34/37). The patients’ quality of life has improved significantly during the treatment. In accordance with the literature, we confirm that NTZ is a highly effective treatment in a carefully selected patient group, and can be administered without significant inconvenience to the patient. ]

Clinical Neuroscience

Independent validation of the Quality of Life in Essential Tremor Questionnaire (QUEST)

KOVÁCS Márton, MAKKOS Attila, JANSZKY József, KOVÁCS Norbert

Quality of Life in Essential Tremor Questionnaire (QUEST) was specially developed for essential tremor population to measure the health-related quality of life. Besides the development of the Hungarian version, we performed an independent testing of the scale adding further information on its clinimetric properties. In this study 133 ET patients treated at University of Pécs, Hungary, were enrolled. Besides QUEST, we assessed Patient’s Global Impression-Severity (PGI-S) and Fahn-Tolosa-Marin Tremor Rating Scales. After the independent validation in accordance to the Classic Theory of Tests, we evaluated cut-off values for detecting clinically meaningful ET-related disabilities based on receiver operating characteristics analysis. Cronbach’s a was 0.897. QUEST demonstrated high convergent validity with PGI and divergent validity with disease-duration, positive family history, need for deep brain stimulation surgery, and the presence of depression and anxiety. Presence of moderate ET-related disabilities was identified by scores > 11.25 points on QUEST-SI (sensitivity: 77.4%, specificity: 83.3%); whereas scores > 20.35 points indicated severe ET-related disabilities (sensitivity: 83.3%, specificity: 59.1%). We demonstrated that the fundamental clinimetric properties of the QUEST are satisfactory.

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Clinical Neuroscience

[The connection between the socioeconomic status and stroke in Budapest]


[The well-known gap bet­ween stroke mortality of Eastern and Western Euro­pean countries may reflect the effect of socioeconomic diffe­rences. Such a gap may be present between neighborhoods of different wealth within one city. We set forth to compare age distribution, incidence, case fatality, mortality, and risk factor profile of stroke patients of the poorest (District 8) and wealthiest (District 12) districts of Budapest. We synthesize the results of our former comparative epidemiological investigations focusing on the association of socioeconomic background and features of stroke in two districts of the capital city of Hungary. The “Budapest District 8–12 project” pointed out the younger age of stroke patients of the poorer district, and established that the prevalence of smoking, alcohol-consumption, and untreated hypertension is also higher in District 8. The “Six Years in Two Districts” project involving 4779 patients with a 10-year follow-up revealed higher incidence, case fatality and mortality of stroke in the less wealthy district. The younger patients of the poorer region show higher risk-factor prevalence, die younger and their fatality grows faster during long-term follow-up. The higher prevalence of risk factors and the higher fatality of the younger age groups in the socioeconomically deprived district reflect the higher vulnerability of the population in District 8. The missing link between poverty and stroke outcome seems to be lifestyle risk-factors and lack of adherence to primary preventive efforts. Public health campaigns on stroke prevention should focus on the young generation of socioeconomi­cally deprived neighborhoods. ]

Clinical Neuroscience

[The Comprehensive Aphasia Test in Hungarian]


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Clinical Neuroscience

The applications of transcranial Doppler in ischemic stroke


Background: This overview provides a summary of the applications of transcranial Doppler (TCD) in ischemic stroke. Results: A fast-track neurovascular ultrasound protocol has been developed for detecting occlusion or stenosis. The technique is more reliable in the carotid area than in the posterior circulation. By monitoring the pulsatility index the in­crea­sed intracranial pressure can be diagnosed. TIBI score was developed for grading residual flow. TCD has been shown to accurately predict complete or any recanalization. Regarding recanalization, TCD has a sensitivity of 92%, a specificity of 88%, a positive predictive value of 96%, a negative predictive value of 78% and an overall accuracy of 91%, respectively. Sonothrombolysis seemed to be a promising application but randomized controlled trials have shown that it does not improve clinical outcome. TCD examination can detect microembolic signals (MES) which are associated with an increased risk of stroke. Micro­em­boli were detected in symptomatic and asymptomatic carotid artery stenosis and during carotid endarterectomy. The number of microemboli can be decreased by antithrombotic therapy. Contrast en­chan­ced examination and Valsalva maneuver with continuous TCD monitoring can accurately screen for right-to-left shunt.

Clinical Neuroscience

Hyperhomocysteinemia in female migraineurs of childbearing ages


Background and purpose - Migraine is a risk factor for ischemic stroke in women of childbearing ages. Previous researches revealed a higher prevalence of hyperhomocysteinemia in migraineurs. Possible differences on the frequencies of hyperhomocysteinemia between migraine with aura and migraine without aura could contribute the established variances in stroke risk between these migraine types. Therefore, we aimed to search if the frequency of hyperhomocysteinemia was different between these subtypes of migraine or not. Methods - We analyzed the findings of serum homocysteine levels in female migraineurs of 16-49 years old who admitted to our outpatient clinic. Results - Homocysteine level was elevated in 13.3% of study population. There were not any significant differences on median serum homocysteine levels between migraine with aura (8.0 mikromol/L) and without aura (8.5 mikromol/L). (p=0.426) The frequencies of hyperhomocysteinemia were also similar (9.1% versus 16.7%, respectively; p=0.373). Correlation analyses did not reveal any linear correlation between ages and homocysteine levels either in group of migraine with aura or in group of migraine without aura (p=0.417 and p=0.647, respectively). Similarly, any linear correlation between disease ages and homocysteine levels either in group of migraine with aura or in group of migraine without aura was not detected (p=0.359 and p=0.849, respectively). Conclusion - The median serum homocysteine levels and the frequencies of hyperhomocysteinemia are similar between migraine with aura and without aura in women of childbearing ages. Therefore, the variances on stroke risk ratios between these types of migraine are probably not originated from the differences of serum homocysteine status.

Clinical Neuroscience

[Clinical neurophysiological methods in diagnosis and treatment of cerebrovascular diseases]

NAGY Ildikó, FABÓ Dániel

[Neurophysiological methods are gaining ground in the diagnosis and therapy of cerebrovascular disease. While the role of the EEG (electroencephalography) in the diagnosis of post-stroke epilepsy is constant, quantitative EEG para-meters, as new indicators of early efficiency after thrombolysis or in prognosis of patient’s condition have proved their effectiveness in several clinical studies. In intensive care units, continuous EEG monitoring of critically ill patients became part of neurointenzive care protocols. SSEP (somatosesnsory evoked potencial) and EEG performed during carotid endarterectomy, are early indicative intraoperativ neuromonitoring methods of poor outcome. Neurorehabilitation is a newly discovered area of neurophysiology. Clinical studies have demonstrated the effectiveness of repetitive transcranial magnetic stimulation (rTMS) in the rehabilitation of stroke patients. Brain computer interface mark the onset of modern rehabi-litation, where the function deficit is replaced by robotic tehnology. ]