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Search results for: blood pressure
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EDITORIALHypertension and cardiovascular disease: Is arterial stiffness the heart of the matter?
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Renal nerve ablation: Emerging role in therapeutics
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Angiotensin receptor - neprilysin inhibiton (ARNI) – A novel therapeutic concept for management of hypertension and heart failure
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Should we treat prehypertension?
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ESH statement on detection and punishment of abstract fraud and poster plagiarism
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Increased Urinary C-Peptide and Albumin Excretion in Juvenile Borderline Hypertensives
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Survey of patient and physician assessment of a compliance reminder device in the treatment of hypertension
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Smoking is associated with chronic sympathetic activation in hypertension
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Medical decision making in hypertension
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2013 ESH/ESC Guidelines for the management of arterial hypertension
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Documentation of endpoint prevention with combination therapy in hypertension is urgently needed
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2013 European Society of Hypertension/European Society of Cardiology Hypertension Guidelines
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SCORE model underestimates cardiovascular risk in hypertensive patients: Results of the Polish Hypertension Registry
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Awareness of hypertension guidelines in primary healthcare in Poland
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Beta‐blockers as sub‐optimal treatment for hypertension: Time for first‐line therapy revision?
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The question of whether diabetes and its cardiovascular risks can be prevented: A realistic DREAM?
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State of global health – hypertension burden and control
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Cardiovascular risks in HIV patients
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Impact of abdominal obesity on the frequency of hypertension and cardiovascular disease in Poland – Results from the IDEA study (International Day for the Evaluation of Abdominal Obesity)
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Hypertension and cardiovascular disease in women: Progress towards better understanding of gender‐specific differences?
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ASCOT – More than a horse race!
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The surge of Japanese studies supporting the use of angiotensin receptor blockers in hypertension
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Does GISSI-AF change the concept of using RAS inhibitors in the primary prevention of atrial fibrillation in hypertensive patients?
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The J-curve phenomenon revisited
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Hypertension research into the new millennium
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Characterization of insomnia in patients with essential hypertension
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Increased time varying heart rate and cardiovascular risk in hypertension – Benefit of selective I(f)channel inhibitor?
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Is smoking a causative factor of hypertension?
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Direct renin inhibitors in hypertension – Approaching the moment of truth
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An American TROPHY in the prevention of hypertension
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Benefits of hypertension management in diabetes: An opportunity not to be missed
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New ESH/ESC Guidelines Signal Progress in Hypertension Management
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RAAS inhibition – a practice of medical progress
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Combination treatment in hypertension – the latest 2013 European Guidelines
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Heightened acute circulatory responses to smoking in women
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Estimation of Oxidative Stress Markers in Chronic Kidney Disease
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Impact of surface skin temperature change on blood flow characteristics in palm
PublicationHeating a human palm during 3 minutes period causes changes in superficial skin temperature and leads to thermoregulation system response. The response time and level of flow characteristics change depend on the subject hand size and health of his vascular tree. A solution of Pennes bioheat propagation model was analyzed in order to see how much heat has to be transferred into the tissue to extort the observable reaction. The reflective...
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Can we rely on the pulse transit time - pressure relationship - models comparison
PublicationAn unobtrusive, noninvasive and continuous pressure measurement is invaluable however, still being under research and development. There are many attempts proposing an appropriate relationship between pulse pressure velocity and pressure. Fifteen different formulas, both theoretical and experimental, describing relation between blood pressure and crosssectional area of the vessel were examined. Using these formulas the relation...
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Numerical solutions for blood flow in elastic vessels
PublicationWe consider the differential–algebraic system for the blood flow and pressure in the systemic arteries. By the operator splitting method, we transform the system into the hyperbolic one, introduce the bicharacteristics, and perform the time–space nonuniform discretization, obtaining the innovative difference scheme. Our results are illustrated with numerical experiments.
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The protocol for using elastic wall model in modeling blood flow within human artery
PublicationMedical diagnostic tools will play a major role in the future for an effective patient treatment and reduction their mortality, related to the cardiovascular system diseases (CVDs). There is an urgent need for developing diagnostic procedure to be robust, reliable, accurate and efficient, in the framework of a paradigm shift. Application of numerical techniques is seen as a perspective tool for such purpose. Nevertheless, existing...
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Modelling of subarachnoid space width changes in apnoea resulting as a function of blood flow parameters
PublicationDuring apnoea, the pial artery is subjected to two opposite physiological processes: vasoconstriction due to elevated blood pressure and vasorelaxation driven by rising pH in the brain parenchyma. We hypothesized that the pial artery response to apnoea may vary, depending on which process dominate. Apnoea experiments were performed in a group of 19 healthy, non-smoking volunteers (9 men and 10 women). The following parameters...
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Discrete-continuous optimisation of an axial flow blood pump
PublicationThis paper presents results of discrete-continuous optimisation of an axial flow blood pump. Evolution Strategies (ES) are used as a global optimisation method in order to localise the optimal solution in relatively short time. The whole optimisation process is fully automated. This also applies to geometry modelling. Numerical simulations of the flow inside the pump is performed by means of the Reynolds-Average Navier-Stokes...
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Influence of preprocessing techniques on pulse pressure velocity determination
PublicationPulse Wave Velocity (PWV) is measured and utilized in many clinical applications. Recently, a wide research has been led to develop a cuff-less and continuous blood pressure method basing on PWV. However, in this application a decision on choosing an appropriate fiducial point of pulse wave (PW) waveform is necessary and substantial. It would allow to measure time parameters necessary to determine PWV. An influence of sampling...
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The Discrete-Continuous, Global Optimisation of an Axial Flow Blood Pump
PublicationThis paper presents the results of the discrete-continuous optimisation of an axial flow blood pump. Differential evolution (DE) is used as a global optimisation method in order to localise the optimal solution in a relatively short time. The whole optimisation process is fully automated. This also applies to geometry modelling. Numerical simulations of the flow inside the pump are performed by means of the Reynolds-Average Navier-Stokes...
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Pulse Transit Time - Fiducial Points Accuracy Determination as Examined by Means of Synthetic Signals
PublicationThere are many approaches to non-invasively deter-mine blood pressure. Among them there are methods based on utilizing pulse transit time measured by means of photoplethys-mography. The variability of the blood pressure drop between two measurement sensors placed along the artery and its dependence on the selected parameters describing the cardiovascular system is presented in the paper. This pressure drop modifies the pressure...
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Numerical investigation of multiphase blood flow coupled with lumped parameter model of outflow
PublicationPurpose The purpose of this paper is the application of the computational fluid dynamics model simulating the blood flow within the aorta of an eight-year-old patient with Coarctation of Aorta. Design/methodology/approach The numerical model, based on commercial code ANSYS Fluent, was built using the multifluid Euler–Euler approach with the interaction between the phases described by the kinetic theory of granular flow (KTGF). Findings A...
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Using wearable device for biomedical signal acquisition and processing
PublicationIn this paper we present the research conducted on synchronous measurements of biosignals. The experiment was conducted to evaluate the possibility of estimating vital signs based on eye tracking. Method: The eGlasses platform was used for acquisition of ECG, respiration rate, eye and pupil movement and blood pressure. Data were acquired in three 5 min. intervals during which a subject was performing certain tasks. The signals...
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A Review on Machine Learning Deployment Patterns and Key Features in the Prediction of Preeclampsia
PublicationPrevious reviews have investigated machine learning (ML) models used to predict the risk of developing preeclampsia. However, they have not addressed the intended deployment of these models throughout pregnancy, nor have they detailed feature performance. This study aims to provide an overview of existing ML models and their intended deployment patterns and performance, along with identified features of high importance. This review...
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Multiscale model for blood flow after a bileaflet artificial aortic valve implantation
PublicationCardiovascular diseases are the leading cause of mortality in the world, mainly due to atherosclerosis and its consequences. The article presents the numerical model of the blood flow through artificial aortic valve. The overset mesh approach was applied to simulate the valve leaflets motion and to realize the moving mesh, in the aortic arch and the main branches of cardiovascular system. To capture the cardiac system’s response...
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Study of Non-Newtonian biomagnetic blood flow in a stenosed bifurcated artery having elastic walls
PublicationFluid structure interaction (FSI) gained attention of researchers and scientist due to its applications in science felds like biomedical engineering, mechanical engineering etc. One of the major application in FSI is to study elastic wall behavior of stenotic arteries. In this paper we discussed an incompressible Non-Newtonian blood fow analysis in an elastic bifurcated artery. A magnetic feld is applied along x direction. For...