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https://www.readbyqxmd.com/read/28087911/-aortic-stiffness-and-its-influencing-factors-in-patients-with-chronic-kidney-disease
#1
Binxian Ye, Li Zhao, Wei Shen, Yan Ren, Bo Lin, Maosheng Chen, Junda Tang, Xinxin Jiang, Yiwen Li, Qiang He
Objective: To investigate the changes of aortic stiffness and its influencing factors in patients with chronic kidney diseases (CKD). Methods: Eightyfour patients with CKD from Department of Nephrology, Zhejiang Provincial People's Hospital were divided into the dialysis group (CKD stage 5, n=48) and non-dialysis group (CKD stage 3-5, n=36). Clinical data, biochemical parameters and echocardiography findings were collected. SphygmoCor pulse wave analysis system was used to obtain pulse wave analysis (PWA) parameters including central aortic systolic blood pressure (CSP), central pulse pressure (CPP), augmented pressure (AP), augmentation index (AIX), and heart rate 75-adjusted augmentation index (HR75AIX)...
May 25, 2016: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28073125/osteocalcin-improves-metabolic-profiles-body-composition-and-arterial-stiffening-in-an-induced-diabetic-rat-model
#2
Lingning Huang, Liyong Yang, Li Luo, Peiwen Wu, Sunjie Yan
Recent studies have demonstrated the benefits of osteocalcin (OCN) on glucose homeostasis and metabolic dysregulation. However, its role in body composition and vascular function remains unknown. This study was designed to examine changes in metabolic parameters and body composition as well as arterial stiffness after OCN treatment in type 2 diabetic rats. Adult male Sprague Dawley (SD) rats were fed chow or high fat diet (HFD) for 8 weeks, and then diabetes was induced with an injection of low-dose streptozotocin (STZ) and treated daily with intraperitoneal injections of OCN for 12 weeks...
January 10, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28068986/leptin-and-adiponectin-as-predictors-of-cardiovascular-risk-after-gestational-diabetes-mellitus
#3
Tove Lekva, Annika Elisabet Michelsen, Pål Aukrust, Tore Henriksen, Jens Bollerslev, Thor Ueland
BACKGROUND: Gestational diabetes mellitus (GDM) is a significant risk factor for cardiovascular disease (CVD) in later life, but the mechanism remains unclear. Adipokine imbalance in the presence of metabolic dysfunction may be a key event in promoting CVD. The aim of the study was to examine the relationships between GDM, cardiovascular risk, and plasma adiponectin, leptin and the leptin/adiponectin (L/A) ratio in pregnancy and at 5 years after the index pregnancy. METHODS: This population-based prospective cohort included 300 women who had an oral glucose tolerance test (OGTT) during pregnancy...
January 10, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28067629/standardized-echocardiographic-assessment-of-cardiac-function-in-normal-adult-zebrafish-and-heart-disease-models
#4
Louis W Wang, Inken G Huttner, Celine F Santiago, Scott H Kesteven, Ze-Yan Yu, Michael P Feneley, Diane Fatkin
The zebrafish (Danio rerio) is an increasingly popular model organism in cardiovascular research. Major insights into cardiac developmental processes have been gained by studies of embryonic zebrafish. However, the utility of zebrafish for modeling adult-onset heart disease has been limited by a lack of robust methods for in vivo evaluation of cardiac function. We established a physiological protocol for underwater zebrafish echocardiography using high frequency ultrasound, and evaluated its reliability in detecting altered cardiac function in two disease models...
January 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28062141/reduced-subclinical-carotid-vascular-disease-and-arterial-stiffness-in-vegetarian-men-the-carvos-study
#5
Julio Acosta-Navarro, Luiza Antoniazzi, Adriana Midori Oki, Maria Carlos Bonfim, Valeria Hong, Pedro Acosta-Cardenas, Celia Strunz, Eleonora Brunoro, Marcio Hiroshi Miname, Wilson Salgado Filho, Luiz Aparecido Bortolotto, Raul D Santos
BACKGROUND: Dietary habits play an important role in the development of atherosclerosis, the most important cause of morbidity and mortality in the world. The objective of this study was to verify if vegetarian (VEG) diet could be related a better profile of subclinical vascular disease evaluated by arterial stiffness and functional and structural properties of carotid arteries, compared to omnivorous (OMN) diet. METHODS: In this cross-sectional study, 44 VEG and 44 OMN apparently healthy men ≥35years of age, in order to not have confounding risk factors of subclinical atherosclerosis, were assessed for anthropometric data, blood pressure, blood lipids, glucose, C reactive protein (CRP), and arterial stiffness determined by carotid-femoral pulse wave velocity (PWV)...
December 20, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28060961/pilot-study-estimation-of-stroke-volume-and-cardiac-output-from-pulse-wave-velocity
#6
Yurie Obata, Maki Mizogami, Daniel Nyhan, Dan E Berkowitz, Jochen Steppan, Viachaslau Barodka
BACKGROUND: Transesophageal echocardiography (TEE) is increasingly replacing thermodilution pulmonary artery catheters to assess hemodynamics in patients at high risk for cardiovascular morbidity. However, one of the drawbacks of TEE compared to pulmonary artery catheters is the inability to measure real time stroke volume (SV) and cardiac output (CO) continuously. The aim of the present proof of concept study was to validate a novel method of SV estimation, based on pulse wave velocity (PWV) in patients undergoing cardiac surgery...
2017: PloS One
https://www.readbyqxmd.com/read/28060189/associations-of-risk-factors-in-childhood-with-arterial-stiffness-26-years-later-the-hanzhong-adolescent-hypertension-cohort
#7
Chao Chu, Yi Dai, Jianjun Mu, Ruihai Yang, Man Wang, Jun Yang, Yong Ren, Bingqing Xie, Zhenzhen Dong, Fan Yang, Dan Wang, Dingyi Yan, Tong-Shuai Guo, Yang Wang
OBJECTIVE: The relationship between childhood risk factors and long-term arterial stiffness was explored. METHODS: A baseline survey was conducted in 4623 school children aged 6-15 years in rural areas of Hanzhong city, Shaanxi, in 1987. According to three independent measurements of SBP in 1987, 1989, and 1992, cases of the same age and sex with continuous SBP at least 75 percentile were classified as the high-blood pressure (BP) group, whereas those with SBP less than 50 percentile were classified as the normal-BP group...
January 5, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28059373/theoretical-and-experimental-analysis-of-instability-of-continuous-wave-mode-locking-towards-high-fundamental-repetition-rate-in-tm-sup-3-sup-doped-fiber-lasers
#8
H Cheng, W Lin, T Qiao, S Xu, Z Yang
With increasing demand on a laser source in the gigahertz pulse repetition rate regime, clarification on the mechanism of instability in high repetition rate fiber lasers - a promising alternative to solid state lasers - is of great importance and can potentially offer guideline for continuous wave (CW) mode locking. Here we present a theoretical approach together with relevant experimental corroboration to analyze the instabilities. By means of appropriate approximations, regimes from Q-switched mode locking, CW mode locking and pulsation are theoretically identified...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28056981/arterial-stiffness-endothelial-and-cognitive-function-in-subjects-with-type-2-diabetes-in-accordance-with-absence-or-presence-of-diabetic-foot-syndrome
#9
Antonino Tuttolomondo, Alessandra Casuccio, Giovanni Guercio, Carlo Maida, Alessandro Del Cuore, Domenico Di Raimondo, Irene Simonetta, Danilo Di Bona, Rosaria Pecoraro, Vittoriano Della Corte, Eliana Gulotta, Gaspare Gulotta, Antonio Pinto
BACKGROUND: Endothelial dysfunction is an early marker of cardiovascular disease so endothelial and arterial stiffness indexes are good indicators of vascular health. We aimed to assess whether the presence of diabetic foot is associated with arterial stiffness and endothelial function impairment. METHODS: We studied 50 subjects with type 2 diabetes mellitus and diabetic foot syndrome (DFS) compared to 50 diabetic subjects without diabetic foot, and 53 patients without diabetes mellitus, by means of the mini mental state examination (MMSE) administered to evaluate cognitive performance...
January 6, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28056237/-normal-value-and-reference-value-range-of-brachial-ankle-pulse-wave-velocity-among-kailuan-study-population
#10
J S Gao, L Song, Y T Wu, X M Zheng, X H Zhao, J Yang, C Y Ruan, H L Zhao, C H Li, Y M Wang, S H Chen, S L Wu
Objective: To establish the normal and reference values of brachial-ankle pulse wave velocity(baPWV) based on Kailuan study population. Methods: There were 22 622 staffs of Kailuan Group who underwent 2010 to 2015 health check-up and baPWV measurement. Data of 20 622 staffs were analyzed after excluding 2 000 staffs due to incomplete data. Of these, 9 109 normal individuals were selected for final analysis of normal and reference values for baPWV after excluding 8 788 staffs who had myocardial infarction, stroke, diabetes, hypertension history, treated by either anti-hypertensive or lipid-lowering drugs, and 2 725 smoker...
December 24, 2016: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28055981/combining-finger-and-toe-photoplethysmograms-for-the-detection-of-atherosclerosis
#11
Mikko Peltokangas, Antti Vehkaoja, Matti Huotari, Jarmo Verho, Ville M Mattila, Juha Röning, Pekka Romsi, Jukka Lekkala, Niku Oksala
: In this study, we propose and analyze a noninvasive method for detecting the atherosclerotic changes of vasculature based on the analysis of photoplethysmographic (PPG) signals. METHODS: the proposed method is called finger-toe (FT)-plot analysis that utilizes both finger and toe PPG signals. For the features extracted from the FT-plots, we implemented different linear discriminant analysis based classifiers and analyzed seven promising ones in detail. We used the signals recorded from altogether 75 test subjects (categorized as 27 atherosclerotic patients and 48 control subjects based on ankle brachial pressure index, symptoms and disease history) in the training, and testing of the method...
January 5, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28053972/lower-extremity-and-carotid-artery-disease-in-copd
#12
Carmen Pizarro, Fabian Linnhoff, Fabian van Essen, Simon Pingel, Christian Alexander Schaefer, Nadjib Schahab, Rolf Fimmers, Georg Nickenig, Dirk Skowasch
In view of their common chronic inflammatory process, we sought to determine the linkage between peripheral artery disease and chronic obstructive pulmonary disease (COPD). 107 COPD patients (mean±sd age 64.6±10.4 years, 52.2% male) and 22 control smokers without previously diagnosed peripheral artery disease underwent standardised angiological examination for lower extremity artery disease (LEAD) and carotid artery disease. LEAD was significantly more prevalent in COPD patients than in controls (80.4% versus 54...
October 2016: ERJ Open Research
https://www.readbyqxmd.com/read/28049936/high-pulse-wave-velocity-has-a-strong-impact-on-early-carotid-atherosclerosis-in-a-japanese-general-male-population
#13
Takuro Kubozono, Masaaki Miyata, Shin Kawasoe, Satoko Ojima, Shiro Yoshifuku, Hironori Miyahara, Shigeho Maenohara, Mitsuru Ohishi
BACKGROUND: Although there have been several reports on the risk factors associated with intima-media thickness (IMT), many questions remain. The purpose of this study was to investigate the association between IMT and cardiovascular risk factors in a Japanese general population.Methods and Results:The study group consisted of 1,583 male subjects undergoing routine health checkups. IMT of the common carotid artery was measured by high-resolution ultrasonography. Brachial-ankle pulse wave velocity (baPWV) was measured using an automated device...
December 29, 2016: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28048367/th-a-207b-00-shear-wave-imaging-and-a-qiba-us-biomarker-update
#14
Paul Carson
: Imaging of tissue elastic properties is a relatively new and powerful approach to one of the oldest and most important diagnostic tools. Imaging of shear wave speed with ultrasound is has been added to most high-end ultrasound systems. Understanding this exciting imaging mode aiding its most effective use in medicine can be a rewarding effort for medical physicists and other medical imaging and treatment professionals. Assuring consistent, quantitative measurements across the many ultrasound systems in a typical imaging department will constitute a major step toward realizing the great potential of this technique and other quantitative imaging...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047721/th-a-207b-01-basics-and-current-implementations-of-ultrasound-imaging-of-shear-wave-speed-and-elasticity
#15
S Chen
: Imaging of tissue elastic properties is a relatively new and powerful approach to one of the oldest and most important diagnostic tools. Imaging of shear wave speed with ultrasound is has been added to most high-end ultrasound systems. Understanding this exciting imaging mode aiding its most effective use in medicine can be a rewarding effort for medical physicists and other medical imaging and treatment professionals. Assuring consistent, quantitative measurements across the many ultrasound systems in a typical imaging department will constitute a major step toward realizing the great potential of this technique and other quantitative imaging...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047072/th-a-207b-02-qiba-ultrasound-elasticity-imaging-system-biomarker-qualification-and-user-testing-of-systems
#16
B Garra
: Imaging of tissue elastic properties is a relatively new and powerful approach to one of the oldest and most important diagnostic tools. Imaging of shear wave speed with ultrasound is has been added to most high-end ultrasound systems. Understanding this exciting imaging mode aiding its most effective use in medicine can be a rewarding effort for medical physicists and other medical imaging and treatment professionals. Assuring consistent, quantitative measurements across the many ultrasound systems in a typical imaging department will constitute a major step toward realizing the great potential of this technique and other quantitative imaging...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045604/technical-failure-of-mr-elastography-examinations-of-the-liver-experience-from-a-large-single-center-study
#17
Mathilde Wagner, Idoia Corcuera-Solano, Grace Lo, Steven Esses, Joseph Liao, Cecilia Besa, Nelson Chen, Ginu Abraham, Maggie Fung, James S Babb, Richard L Ehman, Bachir Taouli
Purpose To assess the determinants of technical failure of magnetic resonance (MR) elastography of the liver in a large single-center study. Materials and Methods This retrospective study was approved by the institutional review board. Seven hundred eighty-one MR elastography examinations performed in 691 consecutive patients (mean age, 58 years; male patients, 434 [62.8%]) in a single center between June 2013 and August 2014 were retrospectively evaluated. MR elastography was performed at 3.0 T (n = 443) or 1...
January 3, 2017: Radiology
https://www.readbyqxmd.com/read/28043217/modulation-of-carotid-strain-by-statin-therapy-in-atherosclerosis-patients
#18
Christian Alexander Schaefer, Anna Katharina Blatzheim, Sebastian Gorgonius Passon, Kristin Solveig Pausewang, Nadjib Schahab, Georg Nickenig, Dirk Skowasch, Robert Schueler, Christoph Hammerstingl, Simon Pingel
BACKGROUND: The beneficial effect of statin therapy on the progress of atherosclerotic disease has been demonstrated by numerous studies. Vascular strain imaging is an arising method to evaluate arterial stiffness. Our study examined whether an influence of statin therapy on the vessel wall could be detected by vascular strain imaging. PATIENTS AND METHODS: 88 patients with recently detected atherosclerosis underwent an angiological examination including ankle-brachial index (ABI), pulse wave index (PWI), central puls ewave velocity and duplex ultrasound...
January 3, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28039989/time-domain-characteristics-of-wave-motion-in-dispersive-and-anisotropic-continuum-acoustic-metamaterials
#19
Zhaojun Wang, Xiaoming Zhou
The authors study the wave propagation in continuum acoustic metamaterials whose all or not all of the principal elements of the mass tensor or the scalar compressibility can be negative due to wave dispersion. Their time-domain wave characteristics are particularly investigated by the finite-difference time-domain (FDTD) method, in which algorithms for the Drude and Lorentz dispersion pertinent to acoustic metamaterials are provided necessarily. Wave propagation nature of anisotropic acoustic metamaterials with all admissible material parameters are analyzed in a general manner...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28036015/influence-of-individual-differences-on-the-calculation-method-for-fbg-type-blood-pressure-sensors
#20
Shouhei Koyama, Hiroaki Ishizawa, Keisaku Fujimoto, Shun Chino, Yuka Kobayashi
In this paper, we propose a blood pressure calculation and associated measurement method that by using a fiber Bragg grating (FBG) sensor. There are several points at which the pulse can be measured on the surface of the human body, and when a FBG sensor located at any of these points, the pulse wave signal can be measured. The measured waveform is similar to the acceleration pulse wave. The pulse wave signal changes depending on several factors, including whether or not the individual is healthy and/or elderly...
December 28, 2016: Sensors
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