keyword
MENU ▼
Read by QxMD icon Read
search

pulse wave analysis

keyword
https://www.readbyqxmd.com/read/28635303/increased-pulse-wave-velocity-in-systemic-lupus-erythematosus-a-meta-analysis
#1
Peng Wang, Yan-Mei Mao, Chan-Na Zhao, Li-Na Liu, Xiao-Mei Li, Xiang-Pei Li, Hai-Feng Pan
Systemic lupus erythematosus (SLE) is associated with increased cardiovascular risk. This study aims to derive a more precise estimation on pulse wave velocity (PWV) level in patients with SLE and related factors. A literature search was performed using PubMed, EMBASE, and The Cochrane Library databases, studies published up to February 28, 2017, in English. Pooled standardized mean difference (SMD) with 95% confidence interval (CI) was calculated by fixed-effect or random-effect model analysis. Heterogeneity test was performed by the Q statistic and quantified using I(2); publication bias was evaluated using a funnel plot and Egger's linear regression test...
January 1, 2017: Angiology
https://www.readbyqxmd.com/read/28632988/solid-sampling-with-a-diode-laser-for-portable-ambient-mass-spectrometry
#2
Yeni P Yung, Raveendra Wickramasinghe, Anu Vaikkinen, Tiina Johanna Kauppila, Igor V Veryovkin, Luke Hanley
A handheld diode laser is implemented for solid sampling in portable ambient mass spectrometry (MS). Specifically, a pseudo-continuous wave battery-powered surgical laser diode is employed for portable laser diode thermal desorption (LDTD) at 940 nm and compared with nanosecond pulsed laser ablation at 2940 nm. Postionization is achieved in both cases using atmospheric pressure photoionization (APPI). The laser ablation atmospheric pressure photoionization (LAAPPI) and LDTD-APPI mass spectra of sage leaves (Salvia officinalis) using a field-deployable quadrupole ion trap MS display many similar ion peaks, as do the mass spectra of membrane grown biofilms of Pseudomonas aeruginosa...
June 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28628659/wave-intensity-of-aortic-root-pressure-as-diagnostic-marker-of-left-ventricular-systolic-dysfunction
#3
Bernhard Hametner, Stephanie Parragh, Thomas Weber, Siegfried Wassertheurer
BACKGROUND: Systolic left ventricular function strongly influences the blood pressure waveform. Therefore, pressure-derived parameters might potentially be used as non-invasive, diagnostic markers of left ventricular impairment. The aim of this study was to investigate the performance of pressure-based parameters in combination with electrocardiography (ECG) for the detection of left ventricular systolic dysfunction defined as severely reduced ejection fraction (EF). METHODS AND RESULTS: Two populations, each comprising patients with reduced EF and pressure-matched controls, were included for the main analysis (51/102 patients) and model testing (44/88 patients)...
2017: PloS One
https://www.readbyqxmd.com/read/28627533/time-resolved-x-ray-scattering-by-electronic-wave-packets-analytic-solutions-to-the-hydrogen-atom
#4
Mats Simmermacher, Niels E Henriksen, Klaus B Møller
Modern pulsed X-ray sources permit time-dependent measurements of dynamical changes in atoms and molecules via non-resonant scattering. The planning, analysis, and interpretation of such experiments, however, require a firm and elaborated theoretical framework. This paper provides a detailed description of time-resolved X-ray scattering by non-stationary electronic wave packets in atomic systems. A consistent application of the Waller-Hartree approximation is discussed and different contributions to the total differential scattering signal are identified and interpreted...
June 19, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28627523/pulse-wave-analysis-and-diabetes-mellitus-a-systematic-review
#5
Jaromira Gajdova, David Karasek, Dominika Goldmannova, Ondrej Krystynik, Jan Schovanek, Helena Vaverkova, Josef Zadrazil
Cardiovascular (CV) disease is the primary cause of death in diabetic patients and one of the explanations may be increased arterial stiffness. Arterial stiffness assessment using pulse wave analysis, is a predictive factor of CV events. The aim of this paper is to review the current knowledge of relations between diabetes mellitus and pulse wave analysis. A MEDLINE search was performed to retrieve both original and review articles addressing the relations and influences on arterial stiffness in diabetics. Pulse wave analysis is considered as a gold standard in CV risk evaluation for patients at risk, especially diabetics...
June 5, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28627331/dynamic-transmit-receive-beamforming-by-spatial-matched-filtering-for-ultrasound-imaging-with-plane-wave-transmission
#6
Yuling Chen, Yang Lou, Jesse Yen
During conventional ultrasound imaging, the need for multiple transmissions for one image and the time of flight for a desired imaging depth limit the frame rate of the system. Using a single plane wave pulse during each transmission followed by parallel receive processing allows for high frame rate imaging. However, image quality is degraded because of the lack of transmit focusing. Beamforming by spatial matched filtering (SMF) is a promising method which focuses ultrasonic energy using spatial filters constructed from the transmit-receive impulse response of the system...
July 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28623932/impact-of-glycemic-control-on-aortic-stiffness-left-ventricular-mass-and-diastolic-longitudinal-function-in-type-2-diabetes-mellitus
#7
Michaela Kozakova, Carmela Morizzo, Alan G Fraser, Carlo Palombo
BACKGROUND: Poor glycemic control is associated with impaired left ventricular (LV) diastolic function in patients with type 2 diabetes mellitus (T2DM). Inappropriate LV mass increase and accelerated aortic stiffening were suggested to participate on deterioration of diastolic function. The present study investigated the inter-relationships between glycemic control, early diastolic and systolic longitudinal velocity of mitral annulus, LV mass and aortic stiffness in T2DM patients free of cardiovascular disease and with preserved LV ejection fraction, and compared them with those observed in healthy volunteers of similar age and sex distribution...
June 17, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28623549/elevated-circulating-pcsk9-concentrations-predict-subclinical-atherosclerotic-changes-in-low-risk-obese-and-non-obese-patients
#8
Štefan Tóth, Ján Fedačko, Tímea Pekárová, Zdenka Hertelyová, Matan Katz, Adil Mughees, Jozef Kuzma, Peter Štefanič, Ivan Kopolovets, Daniel Pella
INTRODUCTION: Many studies have highlighted the important role of PCSK9 in the development of cardiometabolic changes and its possible function as a biomarker of myocardial infarction or ischemic heart disease. This study aimed to determine the relationship between circulating PCSK9 levels and subclinical vascular changes in the group of low risk patients without manifest cardiovascular diseases. METHODS: In this study, 120 healthy patients, free of manifest cardiovascular diseases, diabetes mellitus, and without lipid-lowering therapy, were divided into three groups based on BMI: normal weight (N = 50), overweight (N = 30), and obese (N = 40)...
June 16, 2017: Cardiology and Therapy
https://www.readbyqxmd.com/read/28621831/a-new-rat-model-of-seizures-suitable-for-screening-antiepileptic-electrical-stimulation-therapies
#9
Cristian Sevcencu, Jianhang Jiao, Kristian Rauhe Harreby, Winnie Jensen
The antiepileptic effects of the electrical stimulation therapies developed for patients with intractable epilepsies depend critically on the stimulation parameters, including the pulse duration, current, and frequency. Consequently, optimization of such therapies requires many animals for testing each of the stimulation parameters alone or in combination, which is costly and time consuming. This drawback could be reduced by testing several stimulation paradigms in each animal, but this requires an animal model of long-lasting seizures allowing such repetitive tests...
June 16, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28614093/central-diastolic-pressure-decay-mediates-the-relationship-between-aortic-stiffness-and-myocardial-viability-potential-implications-for-aortosclerosis-induced-myocardial-ischemia
#10
Junichiro Hashimoto, Sadayoshi Ito
OBJECTIVE: Stiffening of the aorta often precedes coronary events, but little is known about the aetiological mechanism. We hypothesized that the predisposition to myocardial ischemia could be attributable to aortosclerosis-induced alterations in the central haemodynamics during diastole. METHODS: Using noninvasive tonometry and ultrasonography, we investigated the arterial pressure pulse waveforms, pulse wave velocities (PWVs) and compliance in 222 patients with hypertension...
June 16, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28613189/cuff-less-blood-pressure-estimation-using-pulse-waveform-analysis-and-pulse-arrival-time
#11
Young-Zoon Yoon, Jae Min Kang, Yongjoo Kwon, Sangyun Park, Seungwoo Noh, Younho Kim, Jongae Park, Sung Woo Hwang
Using the massive MIMIC physiological database, we tried to validate pulse wave analysis (PWA) based on multi-parameters model whether it can continuously estimate blood pressure (BP) values on single site of one hand. In addition, to consider the limitation of insufficient data acquirement for home user, we used pulse arrival time (PAT)-driven BP information to determine the individual scale factors of the PWA-BP estimation model. Experimental results indicate that the accuracy of the average regression model has error standard deviations of 10...
June 12, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28612673/can-flavonoid-rich-chocolate-modulate-arterial-elasticity-and-pathological-uterine-artery-doppler-blood-flow-in-pregnant-women-a-pilot-study
#12
Emma von Wowern, Per Olofsson
INTRODUCTION: Dark chocolate has shown beneficial effects on cardiovascular health and might also modulate hypertensive complications in pregnancy and uteroplacental blood flow. Increased uteroplacental resistance is associated with systemic arterial stiffness. We aimed to investigate the short-term effect of flavonoid-rich chocolate on arterial stiffness and Doppler blood flow velocimetry indexes in pregnant women with compromised uteroplacental blood flow. METHODS: Doppler blood flow velocimetry and digital pulse wave analysis (DPA) were performed in 25 women pregnant in the second and third trimesters with uterine artery (UtA) score (UAS) 3-4, before and after 3 days of ingestion of chocolate with high flavonoid and antioxidant contents...
June 14, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28602188/mapping-of-the-spatial-distribution-of-silver-nanoparticles-in-root-tissues-of-vicia-faba-by-laser-induced-breakdown-spectroscopy-libs
#13
L Krajcarová, K Novotný, M Kummerová, J Dubová, V Gloser, J Kaiser
The manuscript presents a procedure for optimal sample preparation and the mapping of the spatial distribution of metal ions and nanoparticles in plant roots using laser-induced breakdown spectroscopy (LIBS) in a double-pulse configuration (DP LIBS) in orthogonal reheating mode. Two Nd:YAG lasers were used; the first one was an ablation laser (UP-266 MACRO, New Wave, USA) with a wavelength of 266nm, and the second one (Brilliant, Quantel, France), with a fundamental wavelength of 1064nm, was used to reheat the microplasma...
October 1, 2017: Talanta
https://www.readbyqxmd.com/read/28601122/subendocardial-viability-ratio-and-ejection-duration-as-parameters-of-early-cardiovascular-risk-in-children
#14
Nataša Marčun-Varda, Sara Nikolic, Mirjam Močnik
AIM: The purpose of this study was to investigate subendocardial viability ratio (SEVR) and ejection duration (ED) in children and adolescents with common cardiovascular risk factors such as arterial hypertension, obesity, and hypercholesterolemia. METHODS: Four groups of pediatric patients were analyzed: 31 children and adolescents had hypertension, 36 were overweight, 49 were overweight and had hypertension, and 70 had hypercholesterolemia. The patients were compared to a control group of 50 healthy individuals...
June 9, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28601121/relationship-between-subendocardial-viability-ratio-and-hemoglobin-in-patients-with-chronic-kidney-disease
#15
Robert Ekart, Sebastjan Bevc, Nina Hojs, Tina Stropnik Galuf, Martin Hren, Benjamin Dvoršak, Maša Knehtl, Eva Jakopin, Igor Krajnc, Radovan Hojs
AIMS: Pulse wave analysis (PWA) uses the technique of applanation tonometry to obtain a peripheral pulse pressure waveform from which central hemodynamic information is derived. Using PWA, subendocardial viability ratio (SEVR) can be measured. SEVR represents a noninvasive measure of myocardial perfusion. It is related to the work of the heart, the oxygen consumption, and the energy supply of the heart. Anemia is a common complication of chronic kidney disease (CKD). A complex relationship exists between CKD, cardiovascular disease (CVD), and anemia...
June 9, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28597335/effect-of-endoskeleton-stent-graft-design-on-pulse-wave-velocity-in-patients-undergoing-endovascular-repair-of-the-aortic-arch
#16
Daijiro Hori, Kei Akiyoshi, Koichi Yuri, Satoshi Nishi, Takao Nonaka, Takahiro Yamamoto, Yusuke Imamura, Harunobu Matsumoto, Naoyuki Kimura, Atsushi Yamaguchi
PURPOSE: Pulse wave velocity (PWV), which measures vascular stiffness, is a powerful predictor of cardiovascular event. Treatment of aneurysms with endovascular prosthesis has been reported to increase PWV. The purpose of this study was to evaluate whether an endoskeleton stent graft design has less effect on PWV than the exoskeleton stent graft design. METHODS: Between July 2008 and September 2016, 74 patients underwent endovascular treatment of aortic arch aneurysm in our institution...
June 8, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28594337/-op-1c-08-hemodynamic-parameters-in-hypertensive-diabetic-patients
#17
A Yannoutsos, M Ahouah, C Dreyfuss Tubiana, J Topouchian, C Touboul, M Safar, J Blacher
OBJECTIVE: Despite adequate glycemic and blood pressure (BP) control, diabetic hypertensives remain at increased cardiovascular (CV) risk. Aortic stiffness and pulse pressure (PP) amplification may provide complementary information to correct CV risk. We aim to determine whether these hemodynamic parameters are interrelated or not and to explore the factors related to pressure pulsatility.(Figure is included in full-text article.)DESIGN AND METHOD:: A cross-sectional study was conducted in 351 patients, involving controls, hypertensives without diabetes and diabetic patients with or without hypertension...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/28588615/relationship-between-central-arterial-stiffness-and-insulin-resistance-in-chinese-community-dwelling-population-without-diabetes-mellitus
#18
Shihui Fu, Ying Lin, Leiming Luo, Ping Ye
OBJECTIVE: Insulin resistance (IR) is a pathological condition present not only in patients with type 2 diabetes mellitus (DM), but also in community-dwelling population without DM. Both central arterial stiffness and IR are closely correlated with cardiovascular morbidity and mortality. The relationship between central arterial stiffness and IR has not been described in Chinese community-dwelling population without DM. The current analysis was designed to investigate the relationship between central arterial stiffness and IR in Chinese community-dwelling population without DM...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28587605/evaluation-of-arterial-digital-blood-flow-using-doppler-ultrasonography-in-healthy-dairy-cows
#19
H Müller, M Heinrich, N Mielenz, S Reese, A Steiner, A Starke
BACKGROUND: Local circulatory disturbances have been implicated in the development of foot disorders in cattle. The goals of this study were to evaluate the suitability of the interdigital artery in the pastern region in both hind limbs using pulsed-wave (PW) Doppler ultrasonography and to investigate quantitative arterial blood flow variables at that site in dairy cows. An Esaote MyLabOne ultrasound machine with a 10-MHz linear transducer was used to assess blood flow in the interdigital artery in the pastern region in both hind limbs of 22 healthy German Holstein cows...
June 6, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28587488/running-multiple-marathons-is-not-a-risk-factor-for-premature-subclinical-vascular-impairment
#20
Axel Pressler, Christiane Suchy, Tasja Friedrichs, Sophia Dallinger, Viola Grabs, Bernhard Haller, Martin Halle, Johannes Scherr
Background In contrast to the well-accepted benefits of moderate exercise, recent research has suggested potential deleterious effects of repeated marathon running on the cardiovascular system. We thus performed a comprehensive analysis of markers of subclinical vascular damage in a cohort of runners having finished multiple marathon races successfully. Design This was a prospective, observational study. Methods A total of 97 healthy male Munich marathon participants (mean age 44 ± 10 years) underwent detailed training history, cardiopulmonary exercise testing for assessment of peak oxygen uptake, ultrasound for assessment of intima-media-thickness as well as non-invasive assessments of ankle-brachial index, augmentation index, pulse wave velocity and reactive hyperaemia index...
January 1, 2017: European Journal of Preventive Cardiology
keyword
keyword
71050
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"