Lege Artis Medicinae

[Addictions in the focus - Readers’ questions answered by dr. János Szemelyácz]

SZEMELYÁCZ János

JULY 14, 2007

Lege Artis Medicinae - 2007;17(06-07)

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Lege Artis Medicinae

[Clinical consensus conference on COPD]

TAMÁSI Lilla

Lege Artis Medicinae

[THE USE OF BETA RECEPTOR BLOCKERS IN CHRONIC HEART FAILURE]

CZURIGA István

[The beneficial effects of treatment with betablockers in patients with chronic heart failure have been demonstrated in several large, prospective, randomised, placebo-controlled clinical trials. In large trials with mortality as the endpoint, the long-term use of bisoprolol, carvedilol, nevibolol and metoprolol succinate have been associated with a reduction in total mortality, cardiovascular mortality, sudden cardiac death and death due to progression of heart failure in patients of functional classes II-IV. These favorable clinical experiences warrant a recommendation that beta-blockers should be used in all haemodynamically stable heart failure patients with reduced left ventricular systolic function who are on standard treatment, unless contraindicated. In this review, the most important data of clinical trials and practical considerations of therapy with beta-blockers in heart failure are summarized.]

Lege Artis Medicinae

[THE USE OF DIRECT VASODILATORS AND DIGITALIS IN CHRONIC HEART FAILURE]

DÉKÁNY Miklós

[For the optimal treatment of heart failure patients with systolic dysfunction, supplementation of the standard diuretics plus neurohormonal antagonists treatment with the direct vasodilator combination dihydralazine+nitrate, as well as with digitalis may be necessary. Addition of hydralazine/dihydralazine+nitrate to the treatment of chronic heart failure is recommended if ACE-inhibitors or angiotensin-receptor blockers cannot be administered. Beta blockers should also be used in these cases. If symptoms persist or worsen, addition of this combination to the standard therapy is reasonable. Supplementation with digitalis, mostly digoxin should be considered in similar conditions. It can be especially beneficial for patients with high-ventricular-rate atrial fibrillation. To achieve maximal survival benefit, the dose of digoxin must not exceed 0.125 mg/day. Low body weight or muscle mass, significantly reduced renal function may make further dose reduction necessary. If renal function is severely limited, digitoxin instead of digoxin may be used.]

Lege Artis Medicinae

[RECOGNITION AND MANAGEMENT OF ACUTE HEART FAILURE]

KARLÓCAI Kristóf

[Acute heart failure may develop in previously healthy hearts. Nevertheless, structural abnormalities can facilitate its development and also, chronic heart failure can progress into acute stage. Considering the total cost of care in the patient's life, this is the most expensive heart disease. The clinical signs and physical abnormalities are usually of diagnostic power, however, instrumental investigations are necessary to recognize complications and to guide therapy. Patients should be monitored in well equipped coronary care units. Therapy consists of medications, coronary revascularization and use of mechanical assist devices.]

Lege Artis Medicinae

[CONTROVERSIAL EFFECTS OF NITRIC OXIDE: INTEGRITY AND TOXICITY]

KISS Róbert Gábor, BÉRES Bernát János

[Nitric oxide is a key molecule of the human body. Since its discovery, a library of books and papers have been published on its physiological and pathophysiological role. It is involved in almost all pathological processes. In healthy individuals nitric oxide plays a crucial role in the vascular regulation by protecting against atherosclerosis, myocardial infarction and stroke. In the central nervous system, nitric oxide in its function as a neurotransmitter is responsible for synaptic plasticity, long-term potentiation, memory and a number of neuroendocrine control mechanisms. Furthermore, during inflammation and host defense, macrophages and neutrophils produce nitric oxide that has antibacterial, antiviral, and tumour cell killing activity. In pathologic conditions, however, nitric oxide reacts with superoxide anion to form peroxynitrite that damages the enzymes of the mitochondrial respiratory chain, superoxide-dismutase, reduced glutathion and activates or inactivates signalling molecules. During ischaemia- reperfusion, nitric oxide and peroxynitrite contribute to nitrative/nitrosative stress, DNAfragmentation and consequent polyADP-ribosepolymerase- 1 enzyme activation both in coronary thrombosis and ischaemic stroke.]

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VASTAGH Ildikó, SZŐCS Ildikó, OBERFRANK Ferenc, AJTAY András, BERECZKI Dániel

[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. ]

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[Risk of nonsteroidal antiinflammatory drugs. Focus on aceclofenac]

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[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.]

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[A short chronicle of three decades ]

KAPRONCZAY Katalin

[Hungarian professional periodicals started quite late in European context. Their publish­ing, editing and editorial philosophy were equally influenced by specific historical and political situations. Certain breaking points of history resulted in termina­tion of professional journals (War of In­de­pendence 1848-1849, First and Se­cond World Wars), however there were pe­riods, which instigated the progress of sciences and founding of new scientific journals. Both trends were apparent in years after the fall of former Hungarian regime in 1990. The structure of book and journal publishing has changed substantially, some publishers fell “victim” others started successfully as well. The latters include the then-established publishing house Literatura Medica and its own scientific journal, Lege Artis Me­di­cinae (according to its subtitle: New Hun­garian Medical Herald) issued first in 1990. Its appearance enhanced significantly the medical press market. Its scientific publications compete with articles of the well-established domestic medical journals however its philosophy set brand-new trends on the market. Concerning the medical community, it takes on its problems and provides a forum for them. These problems are emerging questions in health care, economy and prevention, in close interrelation with system of public health institutions, infrastructure and situation of those providing individual health services. In all of them, Lege Artis Medicinae follows consequently the ideas of traditional social medicine.]

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[Focus on Lege Artis Medicinae (LAM)]

VASAS Lívia, GEGES József

[Three decades ago, LAM was launched with the goal of providing scientific information about medicine and its frontiers. From the very beginning, LAM has also concerned a special subject area while connecting medicine with the world of art. In the palette of medical articles, it remained a special feature to this day. The analysis of the history of LAM to date was performed using internationally accepted publication guidelines and scientific databases as a pledge of objectivity. We examined the practice of LAM if it meets the main criteria, the professional expectations of our days, when publishing contents of the traditional printed edition and its electronic version. We explored the visibility of articles in the largest bibliographic and scientific metric databases, and reviewed the LAM's place among the Hun­ga­rian professional journals. Our results show that in recent years LAM has gained international reputation des­pite publishing in Hungarian spoken by a few people. This is due to articles with foreign co-authors as well as references to LAM in articles written exclusively by foreign researchers. The journal is of course full readable in the Hungarian bibliographic databases, and its popularity is among the leading ones. The great virtue of the journal is the wide spectrum of the authors' affiliation, with which they cover almost completely the Hungarian health care institutional sys­tem. The special feature of its columns is enhanced by the publication of writings on art, which may increase Hungarian and foreign interest like that of medical articles.]

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Neuroscience highlights: The mirror inside our brain

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Over the second half of the 19th century, numerous theories arose concerning mechanisms involved in understanding of action, imitative learning, language development and theory of mind. These explorations gained new momentum with the discovery of the so called “mirror neurons”. Rizzolatti’s work inspired large groups of scientists seeking explanation in a new and hitherto unexplored area of how we perceive and understand the actions and intentions of others, how we learn through imitation to help our own survival, and what mechanisms have helped us to develop a unique human trait, language. Numerous studies have addressed these questions over the years, gathering information about mirror neurons themselves, their subtypes, the different brain areas involved in the mirror neuron system, their role in the above mentioned mechanisms, and the varying consequences of their dysfunction in human life. In this short review, we summarize the most important theories and discoveries that argue for the existence of the mirror neuron system, and its essential function in normal human life or some pathological conditions.