Melatonin (MEL)is an endogenous hormone with antioxidant potential that plays an important role in maintaining redox homeostasis. MEL and its derivatives directly scavenge free oxygen and nitrogen radicals. Melatonin inhibits lipid peroxidation, stimulates antioxidant enzymes, and reduces metal toxicity. It stabilizes mitochondrial activity and suppresses inflammatory signaling. It takes part in neurogenesis, neuroprotection, and modulation of the cardiovascular system. It prevents many diseases of free radical etiology, i.e., neurodegenerative and circulatory system diseases and ischemic stroke. Supplementation with this antioxidant can slow down the aging process and provide protection against diseases of the central nervous system and support the body’s natural antioxidant system. This study uses current reports from the literature and meta-analyses of the antioxidant mechanisms of melatonin and its importance in neurodegenerative diseases.
K. Mota, C. M. L. de Vasconcelos, L. Kirshenbaum
et al.
Advanced glycation end-products (AGEs) are formed by the non-enzymatic glycation of proteins, lipids, and nucleic acids due to the consumption of high-carbohydrate diets; their production is also promoted by a sedentary lifestyle as well as cigarette smoking. Elevated levels of AGEs in the circulatory system and internal organs of the body are commonly observed in a number of cardiovascular diseases such as hypertension, diabetes, atherosclerosis, coronary artery disease, aortic aneurysm, atrial fibrillation, myocardial infarction, and heart failure, which are associated with the development of oxidative stress and myocardial inflammation. The adverse effects of AGEs on the cardiovascular system are elicited by both non-receptor mechanisms involving the cross-linking of extracellular and intracellular proteins, and by receptor-mediated mechanisms involving the binding of AGEs with advanced glycation end-product receptors (RAGEs) on the cell membrane. AGE–RAGE interactions along with the cross-linking of proteins promote the generation of oxidative stress, the production of inflammation, the occurrence of intracellular Ca2+-overload, and alterations in the extracellular matrix leading to the development of cardiovascular dysfunction. AGEs also bind with two other protein receptors in the circulatory system: soluble RAGEs (sRAGEs) are released upon the proteolysis of RAGEs due to the activation of matrix metalloproteinase, and endogenous secretory RAGEs (esRAGEs) are secreted as a spliced variant of endogenous RAGEs. While the AGE–RAGE signal transduction axis serves as a pathogenic mechanism, both sRAGEs and esRAGEs serve as cytoprotective interventions. The serum levels of sRAGEs are decreased in ischemic heart disease, vascular disease, and heart failure, as well as in other cardiovascular diseases, but are increased in chronic diabetes and renal disease. Several interventions which can reduce the formation of AGEs, block the AGE–RAGE axis, or increase the levels of circulating sRAGEs have been shown to exert beneficial effects in diverse cardiovascular diseases. These observations support the view that the AGE–RAGE axis not only plays a critical role in pathogenesis, but is also an excellent target for the treatment of cardiovascular disease.
The rapid development of nanotechnology has led to increased human exposure to metal-based nanoparticles (MNPs) through inhalation, ingestion, and dermal contact, raising growing concerns on their potential health effects. Due to their nanoscale size and unique physicochemical properties, the MNPs can translocate from the initial exposure sites to the circulatory system and accumulate in the body. This review focuses on MNP-induced cardiovascular toxicity, highlighting its biodistribution, cytotoxic mechanisms, and pathological impact associated with various cardiovascular diseases. MNPs disrupt endothelial function, promote oxidative stress, and induce apoptosis and ferroptosis in cardiovascular cells. Furthermore, MNPs increase endothelial permeability, impair blood–brain barrier integrity, and enhance procoagulant activity, thereby contributing to vascular and cardiac dysfunction. The particles and their released metal ions play a synergistic role in mediating these toxic effects. Here, we focused on the effects of nano-sized particles while incorporating recent in vitro and in vivo studies that address the cardiovascular impacts and mechanisms of MNP-induced toxicity. This comprehensive review will help understand and explain the potentially toxic effects of MNPs on the cardiovascular system.
Conditions affecting the circulatory system and blood vessels are referred to as cardiovascular diseases that include strokes and heart attacks. Internet of Things (IoT) technologies monitor health metrics, identify irregularities and enable remote patient care, resulting in earlier intervention and more individualized therapy. This research aims to establish an efficient cardiovascular disease prediction model through Artificial intelligence (AI)-driven IoT technology. We propose a novel Shuffled Frog leaping-tuned Iterative Improved Adaptive Boosting (SF-IIAdaboost) algorithm for predicting cardiovascular disease with the implementation of IoT device data. IoT medical sensors and wearable devices will collect the patient's clinical data in our proposed framework. Z-score normalization is used to preprocess the gathered data and optimize its quality. Kernel principal component analysis (Kernel-PCA) extracts the relevant features from the processed data. We obtained a dataset that contains various health data gathered from numerous sensing devices to train our recommended model. Our proposed methodology is implemented using Python software. During the evaluation phase, we assess the effectiveness of our model across different parameters. We conduct comparative analyses against conventional methods to ascertain the superiority of our approach. Experimental findings demonstrate the superior performance of our recognition method over traditional approaches. The proposed SF-IIAdaboost algorithm, integrated with IoT device data, presents a promising avenue for predicting cardiovascular disease. The SF-IIAdaboost model demonstrated notable enhancements, attaining 95.37 % accuracy, 93.51 % precision, 94.3 % sensitivity, 96.31 % specificity, and 95.72 % F-measure. Future developments are predicted to involve computing on the edge, where immediate evaluations can be performed in the edge layer to avoid the basic constraints of the clouds, such as high latency, utilization of bandwidth and performing the growth of IoT data. Edge computing can revolutionize the healthcare industry's efficacy by enabling providers to make flexible decisions, operate quickly, and accurately anticipate diseases. It can improve the average level of service standards.
Abstract Introduction The ROsulord® sAfety for patients with Dyslipidemia study (ROAD study) in the Republic of Korea investigated the safety and efficacy of rosuvastatin in routine clinical practice. Methods This non-interventional, multicenter, prospective, observational study was conducted over a period of approximately 4.6 years and involved 14,243 participants. During this study, we assessed the adverse events, changes in laboratory test results, and efficacy endpoints associated with rosuvastatin use. Results The findings revealed a notably low adverse event rate of 1.63%, indicating a favorable safety profile for rosuvastatin in the management of dyslipidemia. Importantly, no clinically significant incidences of statin-associated myopathy, hepatotoxicity, or diabetes were observed during the study period. Moreover, this study demonstrated significant improvements in lipid profiles among patients receiving rosuvastatin treatment, with a reduction in total cholesterol, low-density lipoprotein cholesterol, and triglyceride levels. These improvements contributed to a lower cardiovascular risk in the study population. Conclusion Overall, these findings suggest that rosuvastatin is safe and effective in managing dyslipidemia in real-world clinical settings, providing clinicians with valuable insights into the benefits and risks associated with statin therapy in this patient population.
Diseases of the circulatory (Cardiovascular) system
BACKGROUND:
Owing to the adverse effects of unilateral neglect (UN) on rehabilitation outcomes, fall risk, and activities of daily living, this field has gradually got considerable interest. Notwithstanding, there is presently an absence of efficient portrayals of the entire research field; hence, the motivation behind this study was to dissect and evaluate the literature published in the field of UN following stroke and other nonprogressive brain injuries to identify hotspots and trends for future research.
MATERIALS AND METHODS:
Original articles and reviews related to UN from 1970 to 2022 were retrieved from the Science Citation Index Expanded of the Web of Science Core Collection. CiteSpace, VOSviewer, and Bibliometrix software were used to observe publication fields, countries, and authors.
RESULTS:
A total of 1,202 publications were incorporated, consisting of 92% of original articles, with an overall fluctuating upward trend in the number of publications. Italy, the United Kingdom, and the United States made critical contributions, with Neuropsychologia being the most persuasive academic journal, and Bartolomeo P. ranked first in both the quantity of publications and co-citations. Keywords were divided into four clusters, and burst keyword detection demonstrated that networks and virtual reality might additionally emerge as frontiers of future development and warrant additional attention.
CONCLUSIONS:
UN is an emerging field, and this study presents the first bibliometric analysis to provide a comprehensive overview of research in the field. The insights and guidance garnered from our research on frontiers, trends, and popular topics could prove highly valuable in facilitating the rapid development of this field while informing future research directions.
Medical technology, Diseases of the circulatory (Cardiovascular) system
Introduction. Cardiovascular diseases are the leading cause of death in the population, their diagnosis and prevention are of great importance nowadays. Ferrous metallurgy workers are exposed to occupational risk factors, which, together with a genetic predisposition, can induce and affect progression of diseases of the circulatory system. The Ala16Val (rs4880) polymorphism influences the functioning of the superoxide dismutase enzyme, which catalyzes the first step in the removal of reactive oxygen species, and can be therefore associated with cardiovascular diseases and comorbidities. Our objective was to study the relationship between SOD2 gene Ala16Val polymorphism and blood pressure, body mass index, and biochemical blood test parameters (total cholesterol and glucose levels) in iron and steel production employees. Materials and methods. The study cohort included ninety eight 24 to 66 years (mean: 48.8 ± 8.3 years) male patients working in the converter shop of a metallurgical plant. Genomic DNA was isolated using the LumiPure kit (Lumiprobe, Russia) in accordance with the manufacturer’s instructions for use. Genotyping was performed using a QuantStudioTM 3 real-time PCR system (ThermoFisher, USA) and a commercial SNP-Screen kit (Synthol, Russia). Results. The Val/Val genotype was associated with higher systolic and diastolic blood pressure, and total blood cholesterol. Limitations. The study limitations include the lack of comprehensive data on working conditions in the sanitary and hygienic characteristics presented. There is no control group in the study, which does not allow assessing the contribution of occupational risk factors to the development of cardiovascular diseases in carriers of the Val/Val genotype. However, our sample can be considered representative, which allows applying the findings to assessing health risks for the adult working-age population involved in ferrous metals production with account for regional features. Conclusion. We assume that the Val/Val genotype is associated with risk factors for cardiovascular disease in the metallurgists due to the reduced antioxidant potential.
This article aims to investigate economic factors that determine the mortality rate from cardiovascular diseases in Russian regions. Independent variables are socio-economic factors, including the level of well-being, characteristics of the health care system in the region, level of alcohol consumption as a characteristic of the lifestyle of the population, as well as the directions of state policy for prevention and treatment of cardiovascular diseases, and alcohol and tobacco control initiatives. These factors are the focus of several social programs currently being implemented in Russia. The objective of this study is to identify the degree of sensitivity of the mortality rate from circulatory system diseases to changes in each of the factors considered. This will help to guide public policies aimed at improving population health.The empirical component of the study is based on the data from the Federal State Statistics Service of Russia (for the period from 2005 to 2019), as well as regional budgets and territorial compulsory health insurance funds. Panel data model with fixed effects was evaluated, and the elasticity of mortality from circulatory system diseases to changes in the formed set of factors. The paper shows that an increase in health care costs leads to a decrease in mortality from circulatory system diseases. With that, the sensitivity of this indicator to a one percent change in factors of well-being and lifestyle, including the volume of alcohol consumption, is higher than the sensitivity to a one percent change in health care expenditures. The article revealed the presence of a statistically significant relationship between changes in the legislation, which led to a significant increase in the availability of expensive medical care, and a decrease in mortality from circulatory system diseases. The findings are relevant for those reforming the health care system and can serve as a guideline for developing parameters of government healthcare programs.
Darya P. Tsygankova, Alena S. Agienko, Darya Yu. Sedykh
et al.
HighlightsEvery year more than 4 million deaths are registered from cardiovascular diseases (CVD), which is 46% of all deaths. Over the past 40 years, a downward trend in mortality from CVD has been revealed. However, the COVID-19 pandemic period has changed the statistics of indicators of both total mortality and mortality from CVD. Aim. To analyze the mortality rate (MR) features from CVD in the Kemerovo Region (KR) from 2017 to 2021, in comparison with the Russian Federation (RF) rate.Materials and Methods. Mortality rates of the adult population of KR and RF for the period 2017–2021 were taken from the official sources. The KR/RF dynamics was approximated by a linear trend using Microsoft Excel 2010.Results. Over the past 5 years (from 2017 to 2021) the increase in mortality from CVD was 58.2% in the KR and in the RF – 9%. In 2017 the mortality rates in the RF were higher than in the KR and they levelled off by 2018. However, in the period 2019-2021 there was a sharp increase rate in the KR, in comparison with the RF. According to Kemerovo Statistical Office, the mortality rate from CVD in the region in 2021 was 10.8% higher than in 2020. The structure of mortality from CVD in 2021 in the KR had 52.8% of death cases due to coronary heart disease and 32.6% were caused by the cerebrovascular disease. During the COVID-19 pandemic (2019–2021) the first 3 places among the causes of total mortality in the KR were occupied by CVD (46.3% – 49.4% – 49.3%, respectively), neoplasms (17.1% – 15.2% – 13.2%) and external causes of death (9% – 7.7% – 6.5%). In the structure of total mortality cases the COVID-19 share is 2% in 2020 and 6.4% in 2021, respectively, which raised them to the 4th place in 2021.Conclusion. An increase in mortality rates in the region may indicate both the real causes of death, they can also be associated with the peculiarities the death cases coding and the impact of clinical and organizational technologies as well as the aging of the population. All the data require further in-depth research.
Mansour S Aljabry, Fahad Alabbas, Ghaleb Elyamany
et al.
BACKGROUND: Rare bleeding disorder (RBDs) encompasses a deficiency of one or more of FXIII, FXI, FX, FVII, FV, FII, and FI clotting factors, leading to bleeding disorders with variable presentations and outcomes ranging from none or minimal to life-threatening events. RBDs are still underdiagnosed and underreported, especially in Saudi population with a high prevalence of consanguinity.
OBJECTIVES: The study aimed to determine the frequency of RBDs, grading of their bleeding severity, and assessment of clinical manifestations and management of RBDs in tertiary Saudi Arabian hospitals.
DESIGN AND SETTINGS: This retrospective study of RBDs describes the clinicopathological features of refereed cases to both Prince Sultan Military Medical City and King Khaled University Hospital in Riyadh, Saudi Arabia, from September 2018 to September 2021. Any patient who had already been diagnosed or suspected to have RBDs was enrolled in the study.
PATIENTS AND METHODS: Patient's medical records were reviewed for demographic data, clinical presentations, bleeding and family history, consanguinity, treatment outcomes, and molecular testing. Samples were run in specialized coagulation laboratories. Patients with liver dysfunction or acquired factor deficiency were excluded. Patients were categorized into four groups according to the severity of bleeding episodes: asymptomatic, Grade I, Grade II, and Grade III.
RESULTS: A total of 26 cases with RBDs were identified during the study period. Most of the included patients are males and pediatrics (<14 years) representing 15 (57.7%) and 14 (53.8%), respectively. FVII was the most common factor deficiency encountered in 9 (35%) patients, followed by FXIII in 5 (19%), FXI in 4 (15%), FX in 3 (11.5%), FV in 3 (11.5%), and combined factor deficiency in 2 (8%) patients. 17 (65.4%) RBD patients presented with bleeding manifestation either with Grade I (9%), Grade II (39%), or Grade III (15%), whereas 47% were asymptomatic.
CONCLUSION: The study emphasizes on importance of establishing a national registry of RBDs in Saudi Arabia and the need for further genetic studies to clarify the genotype/phenotype relationships.
Diseases of the circulatory (Cardiovascular) system
Advanced drug delivery micro- and nanosystems have been widely explored due to their appealing specificity/selectivity, biodegradability, biocompatibility, and low toxicity. They can be applied for the targeted delivery of pharmaceuticals, with the benefits of good biocompatibility/stability, non-immunogenicity, large surface area, high drug loading capacity, and low leakage of drugs. Cardiovascular diseases, as one of the primary mortalities cause worldwide with significant impacts on the quality of patients’ life, comprise a variety of heart and circulatory system pathologies, such as peripheral vascular diseases, myocardial infarction, heart failure, and coronary artery diseases. Designing novel micro- and nanosystems with suitable targeting properties and smart release behaviors can help circumvent crucial challenges of the tolerability, low stability, high toxicity, and possible side- and off-target effects of conventional drug delivery routes. To overcome different challenging issues, namely physiological barriers, low efficiency of drugs, and possible adverse side effects, various biomaterials-mediated drug delivery systems have been formulated with reduced toxicity, improved pharmacokinetics, high bioavailability, sustained release behavior, and enhanced therapeutic efficacy for targeted therapy of cardiovascular diseases. Despite the existing drug delivery systems encompassing a variety of biomaterials for treating cardiovascular diseases, the number of formulations currently approved for clinical use is limited due to the regulatory and experimental obstacles. Herein, the most recent advancements in drug delivery micro- and nanosystems designed from different biomaterials for the treatment of cardiovascular diseases are deliberated, with a focus on the important challenges and future perspectives.
The circulatory system distributes blood flow to each tissue and transports oxygen and nutrients. Peripheral circulation is required to maintain the physiological function in each tissue. Disturbance of circulation, therefore, decreases oxygen delivery, leading to tissue hypoxia which takes place in several cardiovascular disorders including atherosclerosis, pulmonary arterial hypertension and heart failure. While tissue hypoxia can be induced because of cardiovascular disorders, hypoxia signaling itself has a potential to modulate tissue remodeling processes or the severity of the cardiovascular disorders. Hypoxia inducible factor-1α (HIF-1α) and HIF-2α belongs to a group of transcription factors which mediate most of the cellular responses to hypoxia at a transcriptional level. We, and others, have reported that HIF-α signaling plays a critical role in the initiation or the regulation of inflammation. HIF-α signaling contributes to the tissue remodeling processes; thus it has a potential to become a therapeutic target. Elucidation of the molecular link, therefore, between hypoxia signaling and tissue remodeling will greatly help us to understand the pathophysiology of the cardiovascular disorders. The purpose of this review is to give a brief overview of the current understanding about the function HIF-α in inflammation processes especially by focusing on its roles in macrophages. In addition, the pathophysiological roles of hypoxia signaling for the development of cardiovascular disease will be discussed.
There are many types of heart disease, and each one has its own symptoms and treatment. For some, lifestyle changes and medicine can make a huge difference in improving your health. Heart disease is a huge term that can describe many different conditions. All of these conditions have some effect on the heart or the blood vessels that supply the heart, cardiovascular disease is not a single ailment, but a disorder of the heart and circulatory system. Heart disease can refer to damage in the heart’s lining, valves, muscle, arteries, or electrical system.
Sebastian Griewing, Niklas Gremke, Julian Kreutz
et al.
This study aims at examining the chronological development of hospitalized cardiovascular and COVID-19 patients and comparing the effects on related sub-disciplines and main diagnoses for pre-pandemic (2017–2019) and pandemic (2020–2021) years in the setting of a German university maximum care provider. Data were retrospectively retrieved from the hospital performance controlling system for patient collectives with main diagnosis of diseases of the circulatory system (nCirculatory) and COVID-19 secondary diagnosis (nCOVID-19). The cardiovascular patient collective (nCirculatory = 25,157) depicts a steady state in terms of relative yearly development of patient numbers (+0.4%, 2019–2020, +0.1%, 2020–2021). Chronological assessment points towards monthly decline during lockdowns and phases of high regional incidence of COVID-19 (i.e., 2019–2020: March −10.2%, April −12.4%, December −14.8%). Main diagnoses of congestive heart failure (+16.1% 2019/2020; +19.2% 2019/2021) and acute myocardial infarction show an increase in case numbers over the course of the whole pandemic (+15.4% 2019/2020; +9.4% 2019/2021). The results confirm negative effects on the cardiovascular care situation during the entire pandemic in the setting of a university maximum care provider. A general increase in cardiac disorders and a worrisome turn in case development of acute myocardial infarction emphasize the feared cardiovascular burden of COVID-19.
A. L. Chilingaryan, L. G. Tunyan, K. G. Adamyan
et al.
Aim. To study the structural and functional left heart parameters in patients with severe aortic stenosis (AS) and preserved ejection fraction (EF) in order to determine the risk of atrial fibrillation (AF).Material and methods. The study included 84 patients (men, 37; mean age, 68±8 years) with severe AS and EF >55%. All patients had sinus rhythm and were asymptomatic. Echocardiography was performed to assess longitudinal strain of the left ventricle (LVLS), right ventricle, left atrium (LALS) and the left atrial stiffness (LAS) using the speckle tracking method. Left ventricular mass index (LVMI) and maximum left atrium volume index (LAVI) were also determined. Patients were followed up for 1 year.Results. AF was reported in 27 (32%) patients, of which 9 (33%) had asymptomatic AF episodes detected by 48-hour electrocardiography. Eighteen (67%) patients with AF felt palpitations. Patients with and without episodes of atrial fibrillation had non-significant differences in LVMI, LAVI, and LVLS. Patients with atrial fibrillation had a lower LALS and a higher LAS compared with patients without atrial fibrillation. Regression analysis revealed that LALS and LAS were independent predictors of AF.Conclusion. AF develops in about one third of asymptomatic patients with severe AS and normal EF. The development of AF predisposes to the onset of AS symptoms in most patients. LALS and LAS were predictors of AF in these patients. Identification of patients at risk of AF will allow for earlier aortic valve replacement.
Diseases of the circulatory (Cardiovascular) system
Oguzhan Ekrem Turan, Resit Yigit Yilancioglu, Ahmet Anil Baskurt
et al.
Upper venous system anatomic variations may cause difficulties during cardiac pacemaker implantation. Persistent left superior vena cava (PLSVC) and absent right superior vena cava could be an arrhythmogenic source of atrial arrhythmias and cardiac conduction disease. We represent dual-chamber pacemaker implantation in a patient with a very rare upper venous system anomaly, paroxysmal atrial fibrillation, sick sinus syndrome, that cause unusual fluoroscopic image.
Diseases of the circulatory (Cardiovascular) system
Leigh Ann O’Banion, MD, FACS, Yazen Qumsiyeh, MD, Heather Matheny, MD
et al.
Vascular patients, an inherently older, frail population, account for >80% of major lower extremity amputations (transtibial or transfemoral) in the United States. Retrospective data have shown that early physical therapy and discharge to an acute rehabilitation facility decreases the postoperative length of stay (LOS) and expedites ambulation. In the present study, we sought to determine whether patients treated with the lower extremity amputation protocol (LEAP) will have improved outcomes. We performed a nonrandomized prospective study of vascular patients undergoing an amputation from January 2019 to February 2020. Patients who were nonambulatory or had undergone a previous contralateral major amputation were excluded. LEAP is a multidisciplinary team approach to the perioperative care of amputees using an outlined protocol. The prospective patients were compared with historic controls treated before the initiation of LEAP (January 2016 to December 2018). The primary outcomes included the postoperative LOS, time to receipt of a prosthesis, and time to ambulation. Of the 141 included patients, 130 were in the retrospective group and 11 in the LEAP group. The demographics and comorbidities were similar. All 11 LEAP patients had undergone a below-the-knee amputation, with 1 requiring revision to an above-the-knee amputation. Of the 130 retrospective patients, 122 (94%) had undergone a below-the-knee amputation, with 1 requiring revision to an above-the-knee amputation. The LEAP patients were more likely to be discharged to acute rehabilitation (100% vs 27%; P < .001), receive a prosthesis (100% vs 45%; P < .001), and ambulate with the prosthesis (100% vs 43%; P < .001). The LEAP patients had received physical therapy 2 days sooner than had the retrospective controls (P = .006) with a shorter postoperative LOS (3 days vs 6 days; P < .001). Of the patients who had received their prosthesis, the LEAP patients had received their prosthesis, on average, 2 months sooner than had the retrospective cohort (81 ± 39 days vs 137 ± 97 days, respectively; P = .002) and had ambulated with their prosthesis sooner (86 ± 53 days vs 146 ± 104 days, respectively; P = .002). No differences were found in the incidence of surgical site complications or unplanned readmissions between the two groups. The results from the present pilot study have demonstrated that the use of LEAP can significantly decrease postoperative LOS and expedite the time to independent ambulation with a prosthesis for vascular patients undergoing a major lower extremity amputation. These findings suggest a powerful ability to bridge the healthcare gap for this high-risk, underserved, and ethnically diverse population using a disease-specific standardized protocol.
Surgery, Diseases of the circulatory (Cardiovascular) system
Biomedical engineers, medical scientists, and clinicians are expressing a notable interest in the measurement of blood flow rate because it is used to detect cardiovascular diseases such as atherosclerosis and arrhythmia. Several researchers have adopted various non-Newtonian fluid models to investigate blood flow in the circulatory system. Because many non-Newtonian fluid models like Herschel Buckley, Powell-Eyring fluid, tangent hyperbolic fluid, and Williamson fluid exhibit the characteristics of blood. The tangent hyperbolic fluid model expresses the rheological characteristics of blood more accurately due to its shear-thinner properties. This work is performed to express the significance of the induced magnetic field and gyrotactic microorganisms on the flow of tangent hyperbolic nanofluid over a plate, wedge and stagnation point of the plate. Suitable self-similarity variables are employed to convert the fluid transport equations into ordinary differential equations which have been solved with the use of the Runge-Kutta-Fehlberg (RKF) approach. The impacts of active parameters on transport properties of the fluid are illustrated with graphs and tables. The growing magnetic parameter lessens the blood nanofluid velocity over three geometries. Blood nanofluid has a higher heat transfer rate over a stagnation point compared with other two geometries. Blood nanofluid temperature augments for uplifting the thermophoresis parameter. Peclet number shows a high impact on microorganisms density in a blood nanofluid. This exploration can provide a clear view regarding the heat and mass transfer behavior of blood flow in a circulatory system and various hyperthermia treatments like treatment of cancer.
Introduction. The economic well-being of the country depends on the size of the able-bodied population. The maximum possible preservation of labor potential is an essential task of public health in any country. The complexity and diversity of factors affecting the population’s mortality make the problem of studying this index considered one of the most urgent. The purpose of the study is to analyze the dynamics of mortality of Russia’s able-bodied population from the circulatory system’s diseases. Material and methods. as the research materials, the Single Interdepartmental Information and Statistical System’s official information. Results. During the past ten years, the mortality rate of the able-bodied population of Russia has been reduced by 1,7 times from all causes. The life expectancy at birth has increased by six years, and the proportion of non-disabled people has decreased by 7% in the population structure. The leading causes of mortality of Russia’s able-bodied population in 2016 were diseases of the circulatory system (DCS) and external causes in the presence of significant differences between Russia’s federal districts. Ischemic heart disease (IHD) and cerebrovascular disease occupy a vital place in the mortality structure of Russia’s able-bodied population. There were significant regional differences in the mortality rate of Russia’s able-bodied population from IHD (2.7 times). In regions with a high mortality rate of the able-bodied population from the DCS, a mortality rate of the able-bodied population from IHD was high. In all areas of Russia, the mortality rate of working-age men is higher than that of women. Conclusion. High mortality rates of Russia’s able-bodied population from DCS determine significant social and economic losses in the country. It put the task of optimizing existing and developing additional activities to study the causes of regional and gender differences, creating and improving organizational and medico-social technologies to improve the demographic situation.