Publications by authors named "Shkolnikova M"

Unlabelled: One of the principles of prevention and non-drug treatment of liver diseases, including hepatitis of various etiologies, is the normalization of the diet, including the use of daily diet foods with physiologically active ingredients, in particular betulin, which helps to reduce metabolic and oxidative processes within liver cells. The aim of the work was to evaluate the in vivo effect of triterpene alcohol betulin Roth isolated from the bark of birch Betula pendula Roth. added to fat-containing products (for example, mayonnaise) on the biochemical parameters of blood and the morphological structure of the liver of rats with initiated acute toxic hepatitis.

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Infiltrative heart disease (InHD) is a group of diseases characterized by the deposition of abnormal substances in the heart tissue, causing diastolic, less often systolic, dysfunction of the ventricle(s). Their classification still does not exist. In 2013, the MOGE(S) classification of cardiomyopathies was published, taking into account, along with the morphological and functional characteristics of the heart, damage to other organs, the presence of genetic mutations, acquired causes (e.

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Article Synopsis
  • The study explores the role of betulin, a triterpene alcohol from birch bark, in improving liver health by normalizing metabolism and reducing oxidative stress, particularly in cases of acute toxic hepatitis.
  • Researchers conducted experiments on male Wistar rats, dividing them into groups to assess the effects of betulin-enriched mayonnaise on blood biochemistry and liver structure.
  • Key parameters evaluated included blood glucose, cholesterol, liver enzyme activities, and oxidative stress indicators, with the aim of demonstrating betulin's hepatoprotective and antioxidant properties.
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Objectives: This study sought to report our single-center experience with left cardiac sympathetic denervation (LCSD) for long QT syndrome (LQTS) since 1973.

Background: LCSD is still underutilized because clinicians are often uncertain whether to use it versus an implantable cardioverter-defibrillator (ICD).

Methods: We performed LCSD in 125 patients with LQTS (58% women, mean QT interval corrected for frequency [QTc] 527 ± 60 ms, 90% on beta blockers) with a follow-up of 12.

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Background: Limited data exist on training of European paediatric and adult congenital cardiologists.

Methods: A structured and approved questionnaire was circulated to national delegates of Association for European Paediatric and Congenital Cardiology in 33 European countries.

Results: Delegates from 30 countries (91%) responded.

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Aims: Mutation type, location, dominant-negative IKs reduction, and possibly loss of cyclic adenosine monophosphate (cAMP)-dependent IKs stimulation via protein kinase A (PKA) influence the clinical severity of long QT syndrome type 1 (LQT1). Given the malignancy of KCNQ1-p.A341V, we assessed whether mutations neighbouring p.

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Background: The pacemaker lead placement is presented as one of the most appropriate procedures in children with a complete atrioventricular block (AVB). Despite the fact that video-assisted thoracic surgery (VATS) for epicardial lead placement has demonstrated positive results as to the feasibility, safety, and efficacy in adults, its role in pacemaker implantation in children remains unclear.

Aim: This study sought to assess the intermediate-term outcomes of video-assisted thoracoscopic pacemaker lead placement in children with complete AVB.

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Article Synopsis
  • High mortality rates from cardiovascular disease (CVD) in Russia are largely unexplained by conventional risk factors, with ventricular arrhythmia (VA) identified as a key contributor, particularly in older men.
  • The study analyzed data from the SAHR study involving 1,800 participants with an average age of 68.8 years, assessing the prevalence of VA and its relation to mortality over a 7.4-year follow-up.
  • Findings showed that VAs were twice as common in men than women and linked to higher CVD mortality, explaining a notable portion of the male mortality gap in both CVD and all-cause deaths.
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Objective: To examine the prevalence of atrial fibrillation (AF), its impacts on cardiovascular disease (CVD) and all-cause mortality, and the associations between AF and inflammatory and serum biomarkers in a population-based sample of Muscovites.

Methods: The study is a secondary analysis of data from the Stress, Aging and Health in Russia (SAHR) survey that includes information on 1800 individuals with an average age of 68.5 years at baseline, and on their subsequent mortality during 7.

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Purpose: to assess specificities of course of the long-QT syndrome in children before and after implantation of cardioverter-defibrillator (ICD), and optimization of indications to ICD-therapy.

Materials And Methods: We included in this study 48 children with long-QT syndrome from 44 unrelated families (28 boys and 20 girls), who underwent ICD implantation at the mean age 11.8±3.

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Background: This study compares handgrip strength and its association with mortality across studies conducted in Moscow, Denmark, and England.

Materials: The data collected by the Study of Stress, Aging, and Health in Russia, the Study of Middle-Aged Danish Twins and the Longitudinal Study of Aging Danish Twins, and the English Longitudinal Study of Ageing was utilized.

Results: Among the male participants, the age-standardized grip strength was 2 kg and 1 kg lower in Russia than in Denmark and in England, respectively.

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The aim of the study was to compare different types of QT correction, establish age norms of QT duration, and assess associations between QT duration and heart rate (HR) in children. The sample comprised 0-18-year-old children (n=5909) selected from general population. The study examined several existing formulas of corrected QT (Bazett, Fridericia, Framingham, and Hodges) and modified Bazett formula developed for healthy children.

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The Brugada syndrome is a hereditary potentially arrhythmogenic disease related to the category of channelopathies. It is manifested as syncopal states and sudden death in young people in the absence of structural cardiac disease. The basis of the disease is genetically determined abnormality of function of ionic channels of cardiomyocytes (sodium, potassium, calcium) phenotypically manifesting as sustained or transitory segment-ST elevation and high risk of polymorphic ventricular tachycardia, fibrillation, and sudden death.

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The Brugada syndrome (BS) belongs to the group of hereditary channelopathies associated with elevated risk of sudden death (SD) in the absence of structural heart diseases. The disorder phenotypically manifests by specific electrocardiographic pattern, associated with ventricular tachycardia (VT). VT can be accompanied by loss of conscience, and after transformation to ventricular fibrillation result in SD.

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The paper presents a practical case of histiocytoid cardiomyopathy concurrent with noncompact myocardium, atrial septal defects, myocarditis, and pericarditis in an 8-month-old girl, by describing their clinical presentations and a morphological examination.

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Background: Analysis of publication activity in the field of biomedicine shows insignificant input of Russia in the world scientific product. This is largely due to the lack of incentives for researchers. Article describes stimulation of researchers in Russia, compares it with foreign models, formulates main shortcomings of support and stimulation of research in Russia and introduces the concept of effective contract.

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Background: The apparent contradiction that women live longer but have worse health than men, the so called male-female health-survival paradox, is very pronounced in Russia. The present study investigates whether men in Moscow are healthier than women at the level of biomarkers, and whether the associations between biomarkers and subjective health have sex-specific patterns.

Materials: Previously collected data in the study of Stress, Aging, and Health in Russia (SAHR, n = 1800) were used to examine sex differences in biomarkers and their associations with physical functioning and self-rated health.

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Background: Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a genetic disorder causing life-threatening arrhythmias whenever sympathetic activity increases. β-Βlockers are the mainstay of therapy; when they fail, implantable cardioverter-defibrillators (ICDs) are used but often cause multiple shocks. Preliminary results with flecainide appear encouraging.

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Persisting high levels of cardiovascular mortality in Russia present a specific case among developed countries. Application of cardiovascular risk prediction models holds great potential for primary prevention in this country. Using a unique set of cohort follow-up data from Moscow and Saint Petersburg, this study aims to test and recalibrate the Systematic Coronary Risk Evaluation (SCORE) methods for predicting CVD mortality risks in the general population.

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Longitudinal data are often segmented by unobserved time-varying factors, which introduce latent heterogeneity at the observation level, in addition to heterogeneity across subjects. We account for this latent structure by a linear mixed hidden Markov model. It integrates subject-specific random effects and Markovian sequences of time-varying effects in the linear predictor.

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In high income countries females outlive men, although they generally report worse health, the so-called male-female health-survival paradox. Russia has one of the world's largest sex difference in life expectancy with a male disadvantage of more than 10 years. We compare components of the paradox between Denmark and Moscow by examining sex differences in mortality and several health measures.

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Allostatic load theory implies a relationship between exposure to psychological stress and multi-system physiological dysregulation. We used data from population-based samples of men and women in Russia (Moscow; n = 1800; age, mean 68.6 years), Taiwan (n = 1036; 65.

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The Russian population continues to face political and economic challenges, has experienced poor general health and high mortality for decades, and has exhibited widening health disparities. The physiological factors underlying links between health and socioeconomic position in the Russian population are therefore an important topic to investigate. We used data from a population-based survey of Moscow residents aged 55 and older (n = 1495), fielded between December 2006 and June 2009, to address two questions.

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