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Clinical Neuroscience

JANUARY 30, 2019

[Multiple ischemic stroke in Osler-Rendu-Weber disease]

SALAMON András, FARAGÓ Péter, NÉMETH Viola Luca, SZÉPFALUSI Noémi, HORVÁTH Emese, VASS Andrea, BERECZKY Zsuzsanna, TAJTI János, VÉCSEI László, KLIVÉNYI Péter, ZÁDORI Dénes

[Hereditary hemorrhagic teleangiectasia (HHT, Osler-Rendu-Weber disease) is an autosomal dominantly inherited disorder caused by the mutation of several possible genes and characterized by malformations of the arteriovenous system in multiple organs. The clinical diagnosis is based on the Curaçao criteria ((1) spontaneous, recurrent epistaxis; (2) teleangiectasias in characteristic sites (lips, oral cavity, nose, fingers); (3) visceral lesions (gastrointestinal, pulmonary, cerebral, spinal); (4) affected first degree relative). The aim of this study is to present the first genetically confirmed Hungarian case of hereditary hemorrhagic teleangiectasia with multiple ischemic strokes. Our 70-year-old woman has been suffering from severe epistaxis since her childhood and presented gastrointestinal bleeding during her adulthood as well. The characteristic skin lesions developed in the 5th decade of life. She was admitted to our department with loss of consciousness and fluctuating speech and swallowing problems. MRI of the brain supplemented with angiography revealed multiple arteriovenous malformations and multiple subacute ischemic lesions. The EEG demonstrated slowing of electric activity in the left frontal lobe. The neuropsychological assessment showed deficits in anterograde memory and executive functions. The diagnostic work-up for other characteristic alterations identified an arteriovenous malformation in the left lung. The genetic analysis demonstrated a heterozygous mutation in the 7th exon of the ENG gene at position 834 resulting in a thymine duplication and an early stop codon by a frame shift. The present case is largely similar to those already described in literature and draws the attention to the importance of multidisciplinary collaboration in the care of HHT patients.]

Lege Artis Medicinae

APRIL 01, 2000

[Modern approach to functional gastrintestinal disorders]


[Functional gastrointestinal disorders defined as a variable combination of chronic or recurrent gastrointestinal symptoms not explained by structural or biochemichal abnormalities, are everpresent in the society and in physicians' offices. These conditions account for half of the referrals to gastroenterologists, at least in the ,,developed countries". The pathophysiological mechanisms involved in the pathogenesis of these disorders are complex. The symptoms are believed to be biologically multidetermined, abnormalities in motor activity, visceral sensation (hypersensitivity and hyperalgesia) and/or central perception are the best known pathogenetic factors. Cultural/familiar influence, psychosocial status, life stress and early life events may also play important role in the development or amplification of the symptoms. Since functional gastrointestinal disorders are interrelated in their pathophysiology and clinical expression, many patients will have overlapping clinical features. Predominant symptoms, however, may be used for classifying these disorders (functional dyspepsia, irritable bowel syndrome etc) and for the positive (symptom-based) diagnostic approach of the functional gastrointestinal disorders. A biopsychosocial model created to explain complex pathophysiology described above provides the rationale also for the use of a multidisciplinary approach in the therapy. ]

Clinical Neuroscience

MAY 30, 2020

Simultaneous subdural, subarachnoideal and intracerebral haemorrhage after rupture of a peripheral middle cerebral artery aneurysm


The cause of intracerebral, subarachnoid and subdural haemorrhage is different, and the simultaneous appearance in the same case is extremely rare. We describe the case of a patient with a ruptured aneurysm on the distal segment of the middle cerebral artery, with a concomitant subdural and intracerebral haemorrhage, and a subsequent secondary brainstem (Duret) haemorrhage. The 59-year-old woman had hypertension and diabetes in her medical history. She experienced anomic aphasia and left-sided headache starting one day before admission. She had no trauma. A few minutes after admission she suddenly became comatose, her breathing became superficial. Non-contrast CT revealed left sided fronto-parietal subdural and subarachnoid and intracerebral haemorrhage, and bleeding was also observed in the right pontine region. The patient had leucocytosis and hyperglycemia but normal hemostasis. After the subdural haemorrhage had been evacuated, the patient was transferred to intensive care unit. Sepsis developed. Echocardiography did not detect endocarditis. Neurological status, vigilance gradually improved. The rehabilitation process was interrupted by epileptic status. Control CT and CT angiography proved an aneurysm in the peripheral part of the left middle cerebral artery, which was later clipped. Histolo­gical examination excluded mycotic etiology of the aneu­rysm and “normal aneurysm wall” was described. The brain stem haemorrhage – Duret bleeding – was presumably caused by a sudden increase in intracranial pressure due to the supratentorial space occupying process and consequential trans-tentorial herniation. This case is a rarity, as the patient not only survived, but lives an active life with some residual symptoms.

Clinical Neuroscience

MARCH 30, 2016

[The importance of anticoagulant therapy in patients with artial fibrillation in stroke prevention – summary of international data and novel therapeutic modalities]


[The most common cardiogenic cause of ischaemic stroke is atrial fibrillation which increases the probability of stroke five-fold and doubles case fatality. Based on international data the incidence of atrial fibrillation is approx. 2% however this rapidly increases with age. The necessity of using oral anticoagulants in the prevention of non-valvular atrial fibrillation related stroke is decided based on estimated stroke risk. The CHADS2 and the more predictive CHA2DS2-VASc scales are used for this purpose while the bleeding risk of patients treated with anticoagulant may be estimated by the HAS-BLED scoring scale. For decades oral anticoagulation meant using vitamin-K antagonists. Based on international data we can see that rate of anticoagulation is unacceptably low, furthermore most of the anticoagulated patients aren’t within the therapeutic range of INR (INR: 2-3). A lot of disadvantages of vitamin-K antagonists are known (e.g. food-drug interaction, need for regular coagulation monitoring, increased risk of bleeding), therefore compounds with new therapeutic target have been developed. The novel oral anticoagulants (NOAC) can be divided in two major subgroups: direct thrombin inhibitors (dabigatran etexilate) and Xa-factor inhibitors (rivaroxaban, apixaban, edoxaban). These products are administered in fix doses, they less frequently interact with other medications or food, and regular coagulation monitoring is not needed when using these drugs. Moreover several studies have shown that they are at least as effective in the prevention of ischaemic stroke than the vitamin-K antagonists, with no more haemorrhagic complications.]

Lege Artis Medicinae

DECEMBER 21, 2020

[Risk of nonsteroidal antiinflammatory drugs. Focus on aceclofenac]


[Nonsteroidal antiinflammatory drugs (NSAIDs) are among the most frequently used pharmaceuticals. Nevertheless, a number of studies emphasized that NSAIDs were damaging not only the gastrointestinal (GI), but also the cardiovascular (CV) system, could increase the blood pressure, the frequency of coronary events (angina, myocardial infarction) and stroke incidence, as well as they might deterio­rate renal functions. The National Institute for Health and Care Excellence (NICE) did not find evidence that administering NSAIDs could increase the risk of developing COVID-19 or worsened the condition of COVID-19 patients. However, unwanted effects of specific drugs differ substantially in their occurrence and seriousness as well. It seemed to be for a long time that the NSAIDs provoked higher GI-risk was closely related to the COX1/COX2 selectivity, like the cardiovascular (CV) risk to the COX2/COX1 selectivity, however, the recent data did not prove it clearly. Based on the available literature while pondering the gastrointestinal and cardiovascular adverse events, among all NSAIDs the aceclofenac profile seemed to be the most favourable.]

Lege Artis Medicinae

APRIL 01, 2000

[New approaches in the pharmacotherapy of irritable bowel syndrome]


[New findings and data obtained in the pathophysiology of IBS had promoting role in the revision of pharmacotherapy of IBS and they were crucial to stimulate the development of new classes of drugs. Symptom-specific treatment is based on three groups of drugs: products modifying the gastrointestinal smooth muscle activity, the visceral hypersensitivity and the central modulatory processes. Only small group of products fulfill the new evaluation criteria.]

Lege Artis Medicinae

APRIL 01, 2000

[Funcitonal Dyspepsia]


[Functional dyspepsia is defined as a group of different epigastric symptoms without definite morphological, biochemical or infectious origin, having overlapping clinical features. The pathogenesis of the syndrome is surely multi factorial, involving the alterations of visceral perception, as well. Gastric acid hypersecretion does not play an essential role in the development of symptoms, however its pharmacological inhibition may result in symptomatic improvement. Several clinical studies have proved recently that Helicobacter pylori infection has secondary importance in the clinical history of functional dyspepsia patients, nevertheless (in the ulcer-like functional dyspepsia subgroup) eradication therapy is generally accepted as a preventive tool. The dysmotility-type subgroup of the functional dyspepsia syndrome is caused primarily by a multifactorial mixture of gastrointestinal motility disorders and altered visceral perception. The need for positiv diagnosis is emphasized by the authors. The correct doctor-patient relationship plays the most important role in the management of functional dyspepsia patients, complete with a well proven series of acid-inhibitory, prokinetics and anti-anxiety drugs.]

Lege Artis Medicinae

JULY 13, 2021

[Mechanism of mucosal defence and options to reduce virus invasion during the COVID pandemic]


[The portal of entry for coronavirus is the mucous membrane of the respiratory tract. Severity, organ manifestations and out­come of COVID-19 are determined by the viral load, burdening the attacked organism. Condition of the respiratory tract and gastrointestinal mucosa and the capacity of their defence system are crucial for virus penetration, fusion with epithelial cells and replication. Direct neural spread, penet­ra­tion into the deeper airways and spread through the lymph nodes depend on these functions. Virus binding and engulfment is an active process. The virus penetrates the endosomes of the epithelial cell, by enzymatic transfer where it is recognised by natural defence agents and triggers the first defence responses. These alarm the entire immune system and trigger a whole chain of inflammatory and enzymatic defence processes (cytokine and bradykinin storm) proportional to the viral load. The severity endpoint of COVID-19 pathology is alveolitis, cerebral vasculitis and intestinal da­mage, often with fatal outcome. The airway mucosa defends itself by secreting surface factors and recruiting and activating cells of the adaptive immune system. An important element of the latter is the early ap­pearance of secretory IgA in the mucosa. The viral invasion can be prevented by application of a nasal spray containing carrageenan, which engages the virus and prevents its attachment by the gel-forming property of carrageenan. This effect has worked in previous virus epidemics and the first COVID-19 experiences confirm its pro­tec­tive role. ]

Lege Artis Medicinae

JUNE 07, 2021

[Practical aspects of anticoagulant treatment during the COVID-19 pandemic]


[Coronavirus infection has a multiple im­pact on the coagulation system and anti­coagulant therapies. Patients admitted with COVID-19 have un­usually high incidence of coagulation ab­normalities. The incidence of atrial fibrillation (AF) seems also to be more frequent among COVID-19 out- and especially in-patients. Among COVID-19 patients receiving oral anticoagulant therapy, for minimizing the risk of bleeding or thromboembolic complications there should also be considered the renal and hepatic functions and drug-drug interactions of oral anticoagulant and COVID-19 therapy. In case of direct anticoagulants, in addition to the benefits of better safety, more favorable treatment ad­he­rence, and fixed dosing, the use of this class of drugs does not require laboratory mo­nitoring of efficacy, which may be of exp­licit benefit in terms of social distancing and health network burdens. This study reviews the possible interactions of drugs used for viral infection and anticoagulation, and in addition to the issues of coagulopathy associated with COVID-19, we discuss also the concerning difficulties of continued anticoagulant therapy related to the social distancing measures.]

Hypertension and nephrology

APRIL 24, 2020

[Arterial hypertension and atrial fibrillation - the most important risk factors for stroke in clinical practice ]


[Vascular stroke is a very frequent cause of morbidity and mortality, and in patients who suffered stroke subsequent long-term neurological deficit of greater or lesser extent is an important factor. Numerous clinical and epidemiological studies confirmed that elevated systemic blood pressure is among the main risk factors of both ischemic and hemorrhagic vascular stroke, the effects of arterial hypertension being very complex including morphological and functional changes in vessels and vascular circulation. In our retrospective analysis of 218 patients hospitalized for stroke we found arterial hypertension in 91.2% of subjects and atrial fibrillation in 32.1% of subjects. 182 patients (83.5%) have been diagnosed with ischemic stroke and 36 patients (16.5%) with hemorrhagic stroke. In the group of patients with atrial fibrillation, only 33 patients (47.1%) were treated by anticoagulants, what points out an inadequate indication of anticoagulant treatment when considering the stroke risk calculation for atrial fibrillation (CHA2DS2- VASc Score) and bleeding risk (HAS-BLED Calculator for Atrial Fibrillation). It is also noteworthy that in the group of patients with anticoagulant therapy who have developed ischemic stroke in spite of this treatment, we found that in 48.5% the treatment was underdosed and therefore ineffective. Our work points to the need to improve the effective management of arterial hypertension and atrial fibrillation, the most common modifiable factors of vascular strokes.]