Репозиторий Университета

© 2018 Media Sphera Publishing Group.All right reserved. Objective. This study aimed to assess the cognitive functions and cerebral blood flow measured with arterial spin labeling (ASL) and their possible correlations with vascular age in untreated middle-aged patients with grade 1-2 essential arterial hypertension (EAH). Methods. We examined 73 subjects aged 40-59 years (33 with EAH and 40 healthy volunteers [controls]). Neuropsychological assessment included Montreal Cognitive Assessment (MoCA), Trail Making test (part A and part B), Stroop Color and Word Test, verbal fluency test (phonemic verbal fluency and semantic verbal fluency), 10-item word list learning task. All subjects underwent brain MRI. MRI protocol included ASL. Vascular age was calculated by two techniques-using Framingham Heart Study risk tables and SCORE project scales. Results. Patients with EAH had lower performance on phonemic verbal fluency test and lower mean MoCA score (29.2±1.4 vs. 28.1±1.7 points) compared to controls (13.4±3.2, p=0.002; 29.2±1.4, p=0.001, respectively). White matter hyperintensities (WMH) were present in 7.5 % controls and in 51.5 % EAH patients (p=0.0002). Cerebral blood flow (CBF) in EAH patients was lower in both right (39.1±5.6 vs. 45.8±3.2 ml/100 g/min) and left frontal lobes of the brain (39.2±6.2 45.2±3.6 ml/100 g/min, respectively) compared to controls (p<0.001). EAH patients without WMH had lower CBF compared to controls (right frontal lobe: 39.5±5.1 ml/100 g/min, p=0.0002; left frontal lobe: 38.9±4.3 ml/100 g/min, p=0.00002). In EAH patients vascular age (57.7±7.4 and 64.6±11.0 years as measured by SCORE project scales and Framingham Heart Study risk tables, respectively) was significantly (p<0.001) greater than chronological one (50.2±6.2 years) and was significantly (p<0.001) higher than the corresponding values in the control group. Correlation analysis revealed negative significant associations between vascular age and MoCA score, phonemic verbal fluency test score and CBF. Conclusions. Treatment-naive middle-aged patients with uncomplicated grade 1-2 EAH compared to normotensive controls have lower mean scores in phonemic fluency test and MoCA, lower CBF, even in the absence of WMH, which correlates with vascular age, particularly with the value calculated by Framingham Heart Study risk tables. Early vascular ageing is important factor of brain impairment in hypertension in middle-aged patients even at early stages of EAH.

© 2018, Dynasty Publishing House. All rights reserved. The objective. Was to develop echographic and Doppler prognostic markers of lesions of the central nervous system (CNS) in premature newborns. Patients and methods. In accordance with the objective of the study we conducted a complex prospective examination of 196 pregnant women diagnosed with threatened preterm labour. The treatment group consisted of 166 women, whose pregnancy ended with spontaneous births at terms 22–36 wks, and premature newborns later developed various disorders of CNS. Results. We found morphological ultrasound and Doppler ultrasound specificities of fetal CNS against the background of threatened preterm labour depending on the term of gestation at the moment of birth and subsequent neurological disorders in premature infants. The most significant were changes of the ventriculo-cranial index, width of anterior horns of lateral ventricles, thalamo-occipital distance, systolic-diastolic ratio between vertebrobasilar vessels of the brain. Conclusion. Such a detailed prenatal diagnosis contributes to noninvasive prognostication of the severity of neurological lesions of CNS in premature infants. The results showed interrelations between perinatal outcomes and initial blood flow impairment of fetal CNS in 97% of observations.

© 2018 Russian Electronic Journal of Radiology.All right reserved. The literature data which demonstrate the possibilities of using computed tomography (CT) with contrast agents for the analysis of the deceased patients' bodies are presented. It is shown that postmortem CT angiography significantly expands the possibility of so-called noninvasive autopsy. The information on the features of the use of different types of con-trast agents as well as the main methods of postmortem CT angiography are presented. The use of targeted postmortem CT angiography allows to study the features of blood supply and to identify pathological changes in blood vessels of certain organs, in particular, coronary heart disease and cerebrovascular lesions. CT angiography of the whole body, especially multiphase postmortem CT angiography, allows to visualization of the cardiovascular system as a whole. The use of CT angiography is most effective for determining the source and volume of internal bleeding, the severity of thrombosis and the degree of stenosis of blood vessels, the type and prevalence of vascular malformations. We noted the complexity of the application and possible artifacts of postmortem CT angiography. It was concluded that postmortem CT angiography can be used to analyze of the bodies and clarify the tanatogenesis of deceased patients. We accented that postmortem CT angiography cannot fully replace the traditional autopsy despite its high specificity and sensitivity with regard to visualization of fatal bleeding.

© 2018, Media Sphera Publishing Group. All rights reserved. The paper describes the procedure to prepare endothelial cell monolayer samples from the vascular intima, which is suitable for studying various morphological processes. To obtain high-quality multicellular specimens, it is recommended to preliminarily remove excess tissue from the outside of the vessel and to free the intima; ways to dry the surface and to separate endothelial cells are examined. The paper gives the figures of specimens stained by the Romanowsky-Giemsa method and identifies factor VIII, an endothelial marker, and Chlamydia pneumoniae inclusions in the cytoplasm of endothelial cells.

© 2018 Stolichnaya Izdatelskaya Kompaniya. Цель. Изучить влияние ожирения в детском и зрелом возрасте на показатели артериальной жесткости, центрального аортального давления в популяционной выборке мужчин 42-43 лет. Материал и методы. Представленное исследование является частью 32-летнего проспективного, когортного наблюдения за лицами мужского пола, начиная с детского возраста (11-12 лет). Через 32 года обследованы 303 (30,1%) представителя исходной популяционной выборки - 1005 человек. В анализ включены 290 человек. Средний возраст мужчин на момент настоящего обследования составил 42,9 лет. Обследование включало опрос по стандартной анкете, измерение антропометрических показателей, артериального давления (АД), подсчет пульса. Измерение жесткости артериальной стенки и центрального давления проводилось методом аппланационной тонометрии. Результаты. Согласно нашим данным из 290 мужчин в возрасте 43 лет только 95 (32,8%) имеют нормальную массу тела (МТ), у 111 (38,3%) выявлена избыточная МТ (ИМТ), а у 84 (28,9%) - ожирение (ОЖ). Мужчины с ОЖ и ИМТ во взрослом возрасте имели статистически значимую ИМТ уже в детском возрасте. Центральное аортальное АД (ЦАД) как суррогатный показатель жесткости сосудов было статистически значимо выше в группах с ОЖ и ИМТ. Корреляционный анализ выявил статистически значимую положительную взаимосвязь между показа- телями, характеризующими ОЖ в детском возрасте (индекс Кетле, толщина кожных складок), и уровнем АД в детском возрасте. Имеется по- ложительная корреляция между толщиной кожных складок в детстве с ЦАД во взрослом возрасте, а также слабая положительная связь между периферическим систолическим АД (пСАД) в детстве и центральным систолическим АД (цСАД) во взрослом возрасте. Из потенци- альных предикторов, оцененных в возрасте 12 лет и включенных в регрессионную модель, только толщина кожной складки под лопаткой (КСЛ) оказывает влияние на значение цСАД в возрасте 43 лет. С увеличением толщины КСЛ в детском возрасте на 1 мм связано повышение цСАД во взрослом состоянии на 0,4 мм.рт.ст. Среди предикторов, оцененных во взрослом возрасте, статистически значимое влияние на уровень цСАД оказывают пСАД, периферическое диастолическое АД (пДАД) и индекс Кетле. На значение центрального диастолического АД (цДАД) в возрасте 43 лет оказывает влияние толщина кожной складки на животе в 12-летнем возрасте. Среди потенциальных предикторов, оцененных во взрослом возрасте, статистически значимое влияние на уровень цДАД оказывают пДАД, показатели ожирения. Заключение. Во взрослом возрасте центральное аортальное давление максимально зависит от повышения периферического АД и показа- телей, характеризующих ожирение. Из детских предикторов (12-летнего возраста) значение имело только ожирение.

It reports the results of primary basal blood flow in partially edentulous bone tissue with atrophy, as well as comparative evaluation of haemomicrocirculation level of the alveolar bone mucosa after bone augmentation via tunneling and conventional methods. The results of the initial state of microcirculation in the mucous membrane of the alveolar process in the partially edentulous area show a 45% decrease of blood flow (M), its intensity (s) by 60%. Microcirculatory shifts in blood flow levels indicators, its intensity, vasomotor activity are more evident when using the conventional method, where revascularization takes more than five months. When using the tunnel method, there is an improvement in haemodynamic mechanisms of tissue blood flow regulation. Microcirculation is restored 4 months after surgery.

© 2018 All-Russian Public Organization Antihypertensive League. All rights reserved. The review discusses the role of blood pressure variability as a novel risk factor and its prognostic value in hypertension associated with the coronary artery disease. We discuss the modern approaches to calculation of blood pressure variability, its classification. The choice of antihypertensive drugs based on the blood pressure variability is discussed considering hypertension associated with coronary artery disease. We pay special attention to angiotensin enzyme converting inhibitors and calcium channel blockers, as well as their combinations. We present the evidence of the effects of perindopril and amlodipine and their fixed combination on the blood pressure variability and the decrease in cardiovascular risk in hypertension associated with coronary artery disease.

Copyright © 2018 Institute of Computer Science. The paper proposes a mathematical model for the therapy of glioma, taking into account the blood-brain barrier, radiotherapy and antibody therapy. The parameters were estimated from experimental data and the evaluation of the effect of parameter values on the effectiveness of treatment and the prognosis of the disease were obtained. The possible variants of sequential use of radiotherapy and the effect of antibodies have been explored. The combined use of radiotherapy with intravenous administration of mab Cx43 leads to a potentiation of the therapeutic effect in glioma. Radiotherapy must precede chemotherapy, as radio exposure reduces the barrier function of endothelial cells. Endothelial cells of the brain vessels fit tightly to each other. Between their walls are formed so-called tight contacts, whose role in the provision of BBB is that they prevent the penetration into the brain tissue of various undesirable substances from the bloodstream. Dense contacts between endothelial cells block the intercellular passive transport. The mathematical model consists of a continuous part and a discrete one. Experimental data on the volume of glioma show the following interesting dynamics: after cessation of radio exposure, tumor growth does not resume immediately, but there is some time interval during which glioma does not grow. Glioma cells are divided into two groups. The first group is living cells that divide as fast as possible. The second group is cells affected by radiation. As a measure of the health of the blood-brain barrier system, the ratios of the number of BBB cells at the current moment to the number of cells at rest, that is, on average healthy state, are chosen. The continuous part of the model includes a description of the division of both types of glioma cells, the recovery of BBB cells, and the dynamics of the drug. Reducing the number of well-functioning BBB cells facilitates the penetration of the drug to brain cells, that is, enhances the action of the drug. At the same time, the rate of division of glioma cells does not increase, since it is limited not by the deficiency of nutrients available to cells, but by the internal mechanisms of the cell. The discrete part of the mathematical model includes the operator of radio interaction, which is applied to the indicator of BBB and to glial cells. Within the framework of the mathematical model of treatment of a cancer tumor (glioma), the problem of optimal control with phase constraints is solved. The patient's condition is described by two variables: the volume of the tumor and the condition of the BBB. The phase constraints delineate a certain area in the space of these indicators, which we call the survival area. Our task is to find such treatment strategies that minimize the time of treatment, maximize the patient's rest time, and at the same time allow state indicators not to exceed the permitted limits. Since the task of survival is to maximize the patient's lifespan, it is precisely such treatment strategies that return the indicators to their original position (and we see periodic trajectories on the graphs). Periodic trajectories indicate that the deadly disease is translated into a chronic one.

© 2018 Media Sphera Publishing Group. All rights reserved. The objective of the present study was to elucidate the peculiar morphological features of the blood stains on the snow over of different density. We have undertaken the modeling and investigation of the blood stains on the loose snow cover (ρ=0.35±0.03 g/cm3) and at the areas of snow compacted by a motor-vehicle wheel (ρ=0.96±0.03 g/cm3) with the use of the visual, metric, descriptive, and statistical methods. The analysis of the blood stain patterns on the loose snow showed that a blood drop tends to form a depressed cylindrical canal at the bottom of which an irregularly shaped spherical element can be seen; it is composed of small snow crystals soaked with blood. The upper end of the canal has the fine-scalloped edge tending to shed unevenly. The morphological picture of the blood stains at the compacted snow cover is similar to that on the hard wettable rough surfaces; they have the oval shape and the unevenly serrated edge with the well apparent signs of sputtering.at the periphery.

© 2018 Media Sphera Publishing Group. All rights reserved. The objective of the present study was to elucidate the specific morphological features of the imprints of blood-soaked straight and wavy head hair. The contact imprints of straight and wavy head hair dirtied with blood were obtained experimentally. The imprints of straight hair were shown to exhibit the elements in the form of the rectilinear and bow-shaped slightly bent stripes. The imprints of wavy hair were shaped as the arches, waves, circles, and a large number of various small elements, such as dashes and commas.

© AUTHORS, 2018. The area of invasive species Aedes albopictus and Aedes aegypti is expanding. Precise identification and understanding of the genetic diversity of invasive mosquito populations allows us to develop appropriate control methods. Endosymbiotic bacterium Wolbachia pipientis has different effects on their arthropod hosts and can influence the transmission and spread of the pathogens. The objective of the presented study was molecular-genetic identification of the Aedes mosquitoes collected in sampling sites on the Black Sea coast from 2007 to 2017; determination of genetic variability of Ae. aegypti, Ae. albopictus and their symbiotic bacteria Wolbachia; assessment of mosquitoes ability to be infected and to spread parasitic Dirofilaria. Another objective was obtaining the genetic characteristic of laboratory strain Ae. aegypti IMPITM. We investigated two markers of nuclear and mitochondrial DNA from Ae. albopictus and Ae. aegypti and compared them to DNA from Ae. cretinus and Ae. koreiсus sympatrically inhabiting the territory, as well as to one of Ae. aegypti from a laboratory line. The study of nuclear and mitochondrial DNA revealed a low level of variability in the invasive mosquitoes Ae. albopictus and Ae. aegypti collected at different collection sites and in different years. More than a half of Ae. albopictus were infected with Wolbachia, two strains of bacteria, wAlbA and wAlbB, occur in the Ae. albopictus population on the Black Sea coast. Total infection of Ae. aegypti and Ae. albopictus with dirofilariae was 1.8 %. Dirofilaria immitis was found only in mosquito abdomen, larvae of infective stage L3 were not found. D. repens larvae developed to the infective stage in the mosquitoes of both species.

© 2018 Media Sphera Publishing Group. All rights reserved. In this article we present problems of prognostic value of day-by-day blood pressure (BP) variability, its role in development and progression of damage of target organs in arterial hypertension, and impact on risk of cardiovascular, cerebral-vascular complications, and mortality. We also discuss methodological aspects of assessment of day-by-day BP variability. The article contains literature data on effects of antihypertensive therapy on variability of home BP, and consideration of evidence base of possibilities of the fixed amlo-dipine/perindopril combination for lowering day-by-day BP variability.

© 2018, Springer Science+Business Media, LLC, part of Springer Nature.  We studied the influence of magnetite nanoparticles (FeO•Fe 2 O 3 ) and quantum dots (CdSe/ZnS coated with mercaptopropionic acid) on the expression of 5 common reference genes (BA, B2M, PPIA, UBC, and YWHAZ) in peripheral blood cells from 20 volunteers by reverse transcription PCR method. The stability of the expression of reference genes varied depending of the cells type and chemical structure of nanoparticles. The level of YWHAZ mRNA after exposure by nanoparticles demonstrated highest stability in lymphocytes, neutrophils, and monocytes. Stability of YWHAZ expression was confirmed by Western blotting. Our findings suggest that YWHAZ is the most suitable as the reference gene.

© 2018 Sergey S. Simakov. The study of the physiological and pathophysiological processes in the cardiovascular system is one of the important contemporary issues, which is addressed in many works. In this work, several approaches to the mathematical modelling of the blood flow are considered. They are based on the spatial order reduction and/or use a steady-state approach. Attention is paid to the discussion of the assumptions and suggestions, which are limiting the scope of such models. Some typical mathematical formulations are considered together with the brief review of their numerical implementation. In the first part, we discuss the models, which are based on the full spatial order reduction and/or use a steady-state approach. One of the most popular approaches exploits the analogy between the flow of the viscous fluid in the elastic tubes and the current in the electrical circuit. Such models can be used as an individual tool. They also used for the formulation of the boundary conditions in the models using one dimensional (1D) and three dimensional (3D) spatial coordinates. The use of the dynamical compartment models allows describing haemodynamics over an extended period (by order of tens of cardiac cycles and more). Then, the steady-state models are considered. They may use either total spatial reduction or two dimensional (2D) spatial coordinates. This approach is used for simulation the blood flow in the region of microcirculation. In the second part, we discuss the models, which are based on the spatial order reduction to the 1D coordinate. The models of this type require relatively small computational power relative to the 3D models. Within the scope of this approach, it is also possible to include all large vessels of the organism. The 1D models allow simulation of the haemodynamic parameters in every vessel, which is included in the model network. The structure and the parameters of such a network can be set according to the literature data. It also exists methods of medical data segmentation. The 1D models may be derived from the 3D Navier - Stokes equations either by asymptotic analysis or by integrating them over a volume. The major assumptions are symmetric flow and constant shape of the velocity profile over a cross-section. These assumptions are somewhat restrictive and arguable. Some of the current works paying attention to the 1D model's validation, to the comparing different 1D models and the comparing 1D models with clinical data. The obtained results reveal acceptable accuracy. It allows concluding, that the 1D approach can be used in medical applications. 1D models allow describing several dynamical processes, such as pulse wave propagation, Korotkov's tones. Some physiological conditions may be included in the 1D models: gravity force, muscles contraction force, regulation and autoregulation.

© 2018, Media Sphera Publishing Group. All rights reserved. Objective. To study cognitive functions, anxiety and depression levels, 24-hour blood pressure (BP) profile, cerebral blood flow (CBF) perfusion in treatment-naive middle-aged patients with uncomplicated essential arterial hypertension (EAH) depending on the white matter hyperintensities (WMH) burden. Material and methods. Forty-one hypertensive patients (mean age 46.2±4.6 years) and 41 healthy volunteers (mean age 50.3±6.7 years) were enrolled to the study. All subjects underwent brain MRI (MAGNETOM Skyra 3.0T, T1, T2 FSE, T2 FLAIR, T1 MPRAGE, ASL), Montreal cognitive assessment (MoCA), 10-word learning task, verbal fluency test, trail making test, Stroop color and word test, anxiety and depression assessment with Hamilton rating scales, 24-hour blood pressure monitoring (ABPM). Results. WMH were found in 22 (53.7%) hypertensive patients and in 3 (7.3%) healthy volunteers (p=0.0002). Hypertensive patients had the significantly lower CBF compared to controls (p<0.001). Conclusion. WMH were identified in treatment-naive middle-aged patients with uncomplicated mild to moderate EAH. There was an association between WMH and lower CBF in the cortical plate of frontal lobes, SBP variability and worse cognition. Cerebral hypoperfusion can cause cognitive impairment even in the earliest stages of EAH, which increases due to emotional disorders.

© 2018, Dynasty Publishing House. All rights reserved. Preoperative anemia is common in clinical practice, particularly in women of reproductive age, and it worsens the outcomes of operative treatment. Red blood cell hemotransfusions can be used for management of anemia developing in the perioperative period, however, they have only a short-term effect and can lead to serious complications. Introduction of blood saving strategies can prevent the development and progression of perioperative anemia and hence avoid hemotransfusions. The review considers modern perioperative blood saving strategies based on recent guidelines of the European and American societies of anesthesiologists.

© 2018 Vserossiiskoe Obshchestvo Kardiologov. All rights reserved. Although on the first glance, the prevention of arterial hypertension (AH) is effective since childhood and adolescence, further research is needed, as it is not well known how to make it effective. Aim. Based upon the analysis of 32-year long dynamics of various levels of blood pressure (BP), to define the efficacy of screening investigations in children. Material and methods. A 32-year long prospective, cohort study conducted, the observation of males beginning at age 11-12 y.o. In 32 years, among 1005 participants, 303 (30,1%) were investigated, and the cohort consisted finally of 290 persons. The assessment included: surveying, triple BP measurement, pulse count, body mass and height measurement, triceps skin folds thickness measurement, as scapular and abdominal, waist and hip circumference, total cholesterol measurement, as the high density, and level of triglycerides, electrocardiogram. Results. Among the males that at the age 12 were in the upper 20% (5th quintile) by systolic BP, in 32 years almost one quarter remained in the same quintile. The stability of raised BP the parameters influence such as body mass and skin fold thickness. Combination of raised systolic BP in high body mass in 13 y.o. adolescents does increase the risk of AH at 43 y.o. the same grade that does an isolated body mass increase - this witness on the decrease of baseline BP values role in hypertension developemnt with remaining role of body mass. The risk of AH development with the baseline age 15 y.o. was significantly higher in combination of overweight and AH. Conclusion. For AH prevention, even in childhood and adolescence it necessary to monitor closely those with raised systolic BP and overweight, and active prevention should start before the age 20 y.o.

© 2018, Media Sphera Publishing Group. All rights reserved. The objective of the present study was the analysis of the results of the medical criminalistics expertises of the blood stains with reference to their different characteristics including the occurrence across the years, variability, the forms and parameters of the traumatizing impacts, the properties of the objects with which the injuries were inflicted, etc. The majority of the data necessary for the analysis were extracted from the archive materials of the Medical and Criminalistic Department of the Bureau of Forensic Medical Expertise of the Moscow Health Department for the period from 2011 till 2015. A total of 5749 expertises performed during this time included 107 analyses of blood stains, 98 trace-evidence and 9 situational analyses. The specific features of such expertises include a large number of objects carrying blood stains available for the analysis. In the majority of the cases, such objects are stained with blood of several types differing in the mechanisms of their formation. 3D-scanning of the scene of the event with the subsequent three-dimensional computer-assisted simulation of the actions of each participant of the accident is considered to be the most promising method for the medical criminalistic expertise of the blood stains. The application of this approach is believed to make the work of the forensic medical experts significantly easier.

© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. The development of express method for assessing the state of skin graft by the spectroscopic properties of tissue components involved in the healing of the affected skin or healing of skin grafts was carried out in present work. The proposed method for assessing the state of the skin by the spectroscopic properties of tissue components (using photosensitizers, fluorescent dyes (methylene blue and IcG) and nanophotosensitizers aluminum phthalocyanine nanoparticles (NP-AlPc) applied locally) will evaluate the physiological condition of the skin and assess the degree and rate of engraftment or rejection while also controlling several biochemical and physiological parameters in the entire graft, or the whole area of the skin lesions. Such parameters include the oxygenation of hemoglobin in the tissue microvasculature; the blood supply level; blood flow and lymph flow; assessment of intracellular metabolism; assessment of the cellular respiration type (aerobic/anaerobic).To assess the extent of inflammation the spectrally sensitive to biological environment nanoparticles of aluminum phthalocyanine (NP-AlPc) were also used.

© 2018, V.A. Negovsky Research Institute of General Reanimatology. All rights reserved. The purpose of the study - to determine the feasibility of using the succinate-based antioxidant for the in vitro reduction of excessive methemoglobin to oxyhemoglobin in blood. Materials and Methods. Blood sampling was performed in five healthy donors in microvettes containing EDTA during prophylactic examinations. NaNO2 solution was added to blood samples in vitro in order to yield methemoglobin (MetHb). The complex drug containing the following active ingredients: succinic acid, inosine, riboflavin, nicotinamide, was used as an antioxidant. The absorption spectrum of red cell suspensions with different drug content Dl(λl) exper was measured with 1 nm increments. The non-linear regression method was used to calculate concentrations of hemoglobin derivatives in suspensions. Results. In our experiments, when methemoglobin reacted with drug the optical density of peaks typical for oxyhemoglobin increased and the spectral peak of methemoglobin decreased. The greater the concentration of drug, the more was the incubation time, the more efficient was the process of reduction of MetHb to HbO2. Conclusion. We proved experimentally that while the baseline concentration of MetHb was an average of 91-93%, addition of drug decreased its concentration to 25-7%. Without drug, due to autoreduction, the concentration of MetHb decreases only to 84%. The revealed effect provide a potential for practical applications in critical illness, during the storage of donor blood, in blood transfusions, and under the action of physico-chemical factors on blood.