The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Paolo Salvi - One of the best experts on this subject based on the ideXlab platform.
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Pulse Wave Analysis
Pulse Waves, 2012Co-Authors: Paolo SalviAbstract:This was what Mahomed wrote, in 1872. He was a man of genius of the end of the 19th century, and he is considered to be the pioneer of Pulse Wave analysis [10]. After the first enthusiasm regarding Pulse Wave analysis, it fell into disuse, mainly for two reasons: first, the young Mahomed died before his time; second, Riva-Rocci introduced his sphygmomanometer. Since then, the possibility of assessing and analyzing Pulse Wave globally has become obsolete, owing to the use of two values: systolic and diastolic blood pressure values.
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Instruments for Pulse Wave Analysis and Measurement of Pulse Wave Velocity
Pulse Waves, 2012Co-Authors: Paolo SalviAbstract:Over the last few years, a lot of new instruments for Pulse Wave analysis or measurement of Pulse Wave velocity have been launched onto the market. It seems that their main aim is to supply operator-independent devices, which can perform faster, while the accuracy of the measurement or the scientific soundness of the algorithms used are of secondary importance [18]. This research on simplification has also led to the design of fanciful instruments, which are extremely easy to use but not scientific. Therefore, you have to cope with the different new devices on the market, keeping in mind the set of values required to make the right choice. In my opinion, the scientific reliability of the values recorded is at the top of my list, followed by cost, with ease of use at the bottom. I take this opportunity to point out that price is not always indicative of good quality of the product and that, as far as medical instruments are concerned, it is rather the sales network and promotion that increase prices.
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Pulse Wave Velocity and Pulse Wave Analysis in Experimental Animals
Pulse Waves, 2012Co-Authors: Paolo SalviAbstract:Until a few years ago, Pulse Wave velocity in experimental animals (mice, rats, rabbits, etc.) could only be measured by invasive methods. The carotid or femoral artery was surgically isolated and catheterized to assess intra-arterial pressure. The carotid and femoral signals were measured simultaneously, and the Pulse Wave transit time was then calculated. However, this operation would cause the death of the small laboratory animal, which was then dissected to measure the distance between the two catheters. Pulse Wave velocity was calculated in this way.
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reference values of Pulse Wave velocity in healthy children and teenagers
Hypertension, 2010Co-Authors: George S Reusz, Orsolya Cseprekal, Mohamed Temmar, Abdelghani Bachir Cherif, Abddelhalim Thaleb, Andrea Fekete, Paolo Salvi, Attila J. Szabó, Athanase BenetosAbstract:Carotid-femoral Pulse Wave velocity is an established method for characterizing aortic stiffness, an individual predictor of cardiovascular mortality in adults. Normal Pulse Wave velocity values for the pediatric population derived from a large data collection have yet to be available. The aim of this study was to create a reference database and to characterize the factors determining Pulse Wave velocity in children and teenagers. Carotid-femoral Pulse Wave velocity was measured by applanation tonometry. Reference tables from Pulse Wave velocities obtained in 1008 healthy subjects (aged between 6 and 20 years; 495 males) were generated using a maximum-likelihood curve-fitting technique for calculating SD scores in accordance with the skewed distribution of the raw data. Effects of sex, age, height, weight, blood pressure, and heart rate on Pulse Wave velocity were assessed. Sex-specific reference tables and curves for age and height are presented. Pulse Wave velocity correlated positively ( P 1000 children, is the first to provide reference values for Pulse Wave velocity in children and teenagers, thereby constituting a suitable tool for longitudinal clinical studies assessing subgroups of children who are at long-term risk of cardiovascular disease.
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reference values of Pulse Wave velocity in healthy children and teenagers
Hypertension, 2010Co-Authors: George S Reusz, Orsolya Cseprekal, Mohamed Temmar, Abdelghani Bachir Cherif, Abddelhalim Thaleb, Andrea Fekete, Paolo Salvi, Attila J. Szabó, Athanase BenetosAbstract:Carotid-femoral Pulse Wave velocity is an established method for characterizing aortic stiffness, an individual predictor of cardiovascular mortality in adults. Normal Pulse Wave velocity values fo...
Elisa E. Konofagou - One of the best experts on this subject based on the ideXlab platform.
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Modelling Pulse Wave Propagation Through a Stenotic Artery with Fluid Structure Interaction: A Validation Study Using Ultrasound Pulse Wave Imaging.
Journal of biomechanical engineering, 2020Co-Authors: Vittorio Gatti, Pierre Nauleau, Grigorios Mario Karageorgos, Jae K. Shim, Gerard A. Ateshian, Elisa E. KonofagouAbstract:Pulse Wave imaging (PWI) is an ultrasound-based method that allows spatiotemporal mapping of the arterial Pulse Wave propagation, from which the local Pulse Wave velocity (PWV) can be derived. Recent reports indicate that PWI can help the assessment of atherosclerotic plaque composition and mechanical properties. However, the effect of the atherosclerotic plaque's geometry and mechanics on the arterial wall distension and local PWV remains unclear. In this study we investigated the accuracy of a finite element (FE) fluid-structure interaction (FSI) approach to predict the velocity of a Pulse Wave propagating through a stenotic artery with an asymmetrical plaque, as quantified with PWI method. Experiments were designed to compare FE-FSI modeling of the Pulse Wave propagation through a stenotic artery against PWI obtained with manufactured phantom arteries made of PVA material. FSI-generated spatiotemporal maps were used to estimate PWV at the plaque region and compare it to the experimental results. Velocity of the Pulse Wave propagation and magnitude of the wall distension were correctly predicted with the FE analysis. In addition, findings indicate that a plaque with a high degree of stenosis (>70%) attenuates the propagation of the Pulse pressure Wave. Results of this study support the validity of the FE-FSI methods to investigate the effect of arterial wall structural and mechanical properties on the Pulse Wave propagation. This modeling method can help to guide the optimization of PWI to characterize plaque properties and substantiate clinical findings.
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Assessing the Stability of Aortic Aneurysms with Pulse Wave Imaging.
Radiology, 2016Co-Authors: Sacha D. Nandlall, Elisa E. KonofagouAbstract:Pulse Wave imaging can be used to assess the stability of murine aortic aneurysms noninvasively by measuring the homogeneity of Pulse Wave propagation within the aneurysm sac.
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Finite Element Modeling of the Pulse Wave propagation in the aorta for simulation of the Pulse Wave Imaging (PWI) method
2008Co-Authors: Jonathan Vappou, Ioannis K. Zervantonakis, Jianwen Luo, Elisa E. KonofagouAbstract:A large number of pathological conditions result in significant changes of the mechanical properties of the aortic wall. Using the Pulse Wave Velocity (PWV) as an indicator of aortic stiffness has been proposed for several decades. Pulse Wave Imaging (PWI) is an ultrasonography-based imaging method that has been developed to map and quantify the Pulse Wave (PW) propagation along the abdominal aortic wall and measure its local properties. We present a finite-element-based approach that aims at improving our understanding of the complex PW patterns observed by PWI and their relationship to the underlying mechanical properties. A Fluid-Structure Interaction (FSI) coupled model was developed based on an idealized axisymmetric aorta geometry. The accuracy of the model as well as its ability to reproduce realistic PW propagation were evaluated by performing a parametric analysis on aortic elasticity, by varying the aortic Young’s modulus between 20 kPa and 2000 kPa. The Finite-Element model was able to predict with good accuracy the expected PWV values in different theoretical cases, with an averaged relative difference of 14% in the 20kPa-100kPa, which corresponds to a wide physiologic range for stiffness of the healthy aorta. This study allows to validate the proposed FE model as a tool that is capable of representing quantitatively the Pulse Wave patterns in the aorta. Contents
Akira Yamashina - One of the best experts on this subject based on the ideXlab platform.
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relationship between radial and central arterial Pulse Wave and evaluation of central aortic pressure using the radial arterial Pulse Wave
Hypertension Research, 2007Co-Authors: Kenji Takazawa, Hideyuki Kobayashi, Naohisa Shindo, Nobuhiro Tanaka, Akira YamashinaAbstract:Relationship between Radial and Central Arterial Pulse Wave and Evaluation of Central Aortic Pressure Using the Radial Arterial Pulse Wave
Kenji Takazawa - One of the best experts on this subject based on the ideXlab platform.
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relationship between radial and central arterial Pulse Wave and evaluation of central aortic pressure using the radial arterial Pulse Wave
Hypertension Research, 2007Co-Authors: Kenji Takazawa, Hideyuki Kobayashi, Naohisa Shindo, Nobuhiro Tanaka, Akira YamashinaAbstract:Relationship between Radial and Central Arterial Pulse Wave and Evaluation of Central Aortic Pressure Using the Radial Arterial Pulse Wave
George S Reusz - One of the best experts on this subject based on the ideXlab platform.
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reference values of Pulse Wave velocity in healthy children and teenagers
Hypertension, 2010Co-Authors: George S Reusz, Orsolya Cseprekal, Mohamed Temmar, Abdelghani Bachir Cherif, Abddelhalim Thaleb, Andrea Fekete, Paolo Salvi, Attila J. Szabó, Athanase BenetosAbstract:Carotid-femoral Pulse Wave velocity is an established method for characterizing aortic stiffness, an individual predictor of cardiovascular mortality in adults. Normal Pulse Wave velocity values for the pediatric population derived from a large data collection have yet to be available. The aim of this study was to create a reference database and to characterize the factors determining Pulse Wave velocity in children and teenagers. Carotid-femoral Pulse Wave velocity was measured by applanation tonometry. Reference tables from Pulse Wave velocities obtained in 1008 healthy subjects (aged between 6 and 20 years; 495 males) were generated using a maximum-likelihood curve-fitting technique for calculating SD scores in accordance with the skewed distribution of the raw data. Effects of sex, age, height, weight, blood pressure, and heart rate on Pulse Wave velocity were assessed. Sex-specific reference tables and curves for age and height are presented. Pulse Wave velocity correlated positively ( P 1000 children, is the first to provide reference values for Pulse Wave velocity in children and teenagers, thereby constituting a suitable tool for longitudinal clinical studies assessing subgroups of children who are at long-term risk of cardiovascular disease.
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reference values of Pulse Wave velocity in healthy children and teenagers
Hypertension, 2010Co-Authors: George S Reusz, Orsolya Cseprekal, Mohamed Temmar, Abdelghani Bachir Cherif, Abddelhalim Thaleb, Andrea Fekete, Paolo Salvi, Attila J. Szabó, Athanase BenetosAbstract:Carotid-femoral Pulse Wave velocity is an established method for characterizing aortic stiffness, an individual predictor of cardiovascular mortality in adults. Normal Pulse Wave velocity values fo...
