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Results 51 - 100 of 1816
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Clarisse O - - 2012
A series of laboratory experiments was conducted under realistic environmental conditions to test the ability of the Diffusive Gradient in Thin film (DGT) technique to mimic monomethylmercury (MMHg) bioaccumulation by a clam (Macoma balthica, Baltic clam). Using isotope enriched MMHg as tracers, bioavailability was determined by comparing the rate of ...
Tent Hilde - - 2012
BACKGROUND: Living kidney donor selection has become more liberal with acceptation of hypertensive donors. Here, we evaluate short-term and 1- and 5-year renal outcome of living kidney donors with preexistent hypertension. METHODS: We compared outcome of hypertensive donors by gender, age, and body mass index with matched control donors. Hypertension ...
Sauder Katherine A - - 2012
Little is known about transient effects of foods and nutrients on reactivity to mental stress. In a randomized crossover study of healthy adults (n=20), we measured heart rate variability (respiratory sinus arrhythmia), blood pressure, and other hemodynamic variables after three test meals varying in type and amount of fat. Measurements ...
Marcilla Miguel G - - 2012
Objective  To investigate the influence of a dexmedetomidine constant rate infusion (CRI) in horses anaesthetized with isoflurane. Study design  Prospective, randomized, blinded, clinical study. Animals  Forty adult healthy horses (weight mean 491 ± SD 102 kg) undergoing elective surgery. Methods  After sedation [dexmedetomidine, 3.5  μg  kg(-1) intravenously (IV)] and induction IV (midazolam 0.06 mg kg(-1) ...
Kolli Kranthi K - - 2012
Decisions based on invasive functional diagnostic measurements are often made in the setting of fluctuating hemodynamic variables that may alter resting or hyperemic measurements. The purpose of this investigation is to analyze the effect of myocardial contractility (CY) on invasive functional parameters. We hypothesize that the pressure drop coefficient (CDPe; ...
Wierzcholski Krzysztof - - 2012
The present paper is concerned with the calculation of the stochastic unsteady, impulsive pressure distributions and load carrying capacities in human hip joint for unsteady stochastic conditions, various standard deviations and Gaussian probability density function. The total changes of hydrodynamic pressure caused by viscoelastic synovial fluid properties are completely estimated. ...
Zhao Xiaofeng - - 2012
A novel nc-Si/c-Si heterojunction MOSFETs pressure sensor is proposed in this paper, with four p-MOSFETs with nc-Si/c-Si heterojunction as source and drain. The four p-MOSFETs are designed and fabricated on a square silicon membrane by CMOS process and MEMS technology where channel resistances of the four nc-Si/c-Si heterojunction MOSFETs form ...
Hosseinzadeh Atar Mohammad Javad - - 2012
Hypertension is a condition normally detected in people with type II diabetes.It eventually leads to cardiovascular diseases in the patient. Visfatin is an adipocytokine which issecreted from adipose tissue and can affect the inflammatory reaction and also serum lipidlevels. Additionally, omega-3 inhibits the accumulation of fat and formation of insulinresistance. ...
Xu Liang - - 2012
To examine associations between neuroretinal rim area, pressure related factors and anthropometric parameters in a population-based setting. The population-based cross-sectional Beijing Eye Study 2006 included 3251 subjects with an age of 45+ years. The participants underwent a detailed ophthalmic examination. Exclusion criteria for our study were high myopia of more ...
Dommerich Steffen - - 2012
High hydrostatic pressure (HHP) treatment can eliminate cholesteatoma cells from explanted human ossicles prior to re-insertion. We analyzed the effects of HHP treatment on the microbial flora on ossicles and on the planktonic and biofilm states of selected isolates. Twenty-six ossicles were explanted from cholesteatoma patients. Five ossicles were directly ...
Hartmann Erik K - - 2012
Cyclic alveolar recruitment/derecruitment (R/D) is an important mechanism of ventilator-associated lung injury. In experimental models this process can be measured with high temporal resolution by detection of respiratory-dependent oscillations of the paO2 (ΔpaO2). A previous study showed that end-expiratory collapse can be prevented by an increased respiratory rate in saline-lavaged ...
Pointer Mildred A MA Julius L. Chambers Biomedical/Biotechnology Research Institute, North Carolina Central University, Durham, NC 27707, - - 2012
Although several studies have shown that enhanced cardiovascular reactivity can predict hypertension development in African Americans, these findings have not been consistent among all studies examining reactivity and hypertension susceptibility. This inconsistency may be explained by the influence of anxiety (state and trait) on the blood pressure response to stress. ...
Ghosh Erina - - 2012
Global left ventricular (LV) isovolumic relaxation rate has been characterized: 1) via the time constant of isovolumic relaxation τ or 2) via the logistic time constant τ(L). An alternate kinematic method, characterizes isovolumic relaxation (IVR) in accordance with Newton's Second Law. The model's parameters, stiffness E(k), and damping/relaxation μ result ...
Rodríguez Pérez María C - - 2012
To analyze the factors associated with knowledge and control of hypertension in the adult population of the Canary Islands (18-75 years). We recruited a random sample of the general population aged ≥18 years. Hypertension was defined as systolic/diastolic blood pressure ≥140/90 mmHg or known hypertension (self-declared, or controlled hypertension <140/90 ...
Smith Phillip P - - 2012
The prevalence of urinary symptoms increases with age and is a significant source of distress, morbidity, and expense in the elderly. Recent evidence suggests that symptoms in the aged may result from sensory dysfunction, rather than abnormalities of detrusor performance. Therefore, we employed a pressure/flow multichannel urethane-anesthetized mouse cystometry model ...
Neel Amy T - - 2011
PURPOSE: The purpose of this study is to assess the relationship between tongue strength and rate of articulation in two speech tasks, diadochokinetic rates and reading aloud, in healthy men and women between 20 and 78 years of age. METHOD: Diadochokinetic rates were measured for the syllables /p/, /t/, /k/, ...
Ma Qintian - - 2011
Molecular dynamics simulations evidenced a structural transition of the flexible MIL-53(Cr) under a relatively moderate applied pressure ∼50 MPa. The incorporation of CO(2) within its porosity significantly shifts the onset of such a transformation at lower pressure while it decreases the bulk modulus of this solid.
Lambiase Maya J - - 2011
OBJECTIVE: Cardiovascular reactivity is associated with carotid artery intima-media thickness as early as childhood. Excess cardiovascular responses relative to the metabolic demand during psychological stress have been proposed as a mechanism for this association. However, it is not known whether excess cardiovascular responses in relation to the metabolic demand correlate ...
Reppel Michael - - 2011
BACKGROUND: Emotional stress is considered a risk factor for cardiovascular events, the underlying pathophysiology remains unclear. METHODS: To evaluate how emotional stress effects hemodynamics, thirteen healthy German soccer fans (mean 37.6years, 24-56years) were studied during live TV coverage of the finals with German national team participation (GP) and the respective ...
Lindeboom Ralph - - 2011
Autogenerative High Pressure Digestion (AHPD) is a novel configuration of anaerobic digestion, in which micro-organisms produce autogenerated biogas pressures up to 90 bar with >90% CH4-content in a single step reactor (Lindeboom et al., 2011). The less than 10% CO2-content was postulated to be resulting from proportionally more CO2 dissolution ...
Burri E - - 2011
Background  We previously showed that changes in intra-abdominal content induce a volume-dependent muscular response of the anterior abdominal wall and the diaphragm. We aimed to determine the contribution of the thorax to abdominal accommodation and the influence of the intra-abdominal expansion rate. Methods  Gas (1440 mL total load) was infused into ...
Lohmeier Thomas E - - 2012
Chronic pressure-mediated baroreflex activation suppresses renal sympathetic nerve activity. Recent observations indicate that chronic electric activation of the carotid baroreflex produces sustained reductions in global sympathetic activity and arterial pressure. Thus, we investigated the effects of global and renal specific suppression of sympathetic activity in dogs with sympathetically mediated, obesity-induced ...
Siennicki-Lantz Arkadiusz - - 2012
To assess an impact of vascular risk factors on ambulatory blood pressure measurement (ABPM) in the elderly, we followed up a population-based cohort of men from 68 until 82 years, when 104 survivors underwent ABPM. Results. At age 68, hypertension and high clinic blood pressure (CBP) did not predict ABPM ...
Nie Pei-He - - 2011
AIM OF THE STUDY: This work aims to investigate the effects of HSYA on cardiac function and blood pressure. MATERIALS AND METHODS: To evaluate changes in mean arterial pressure (MAP) and heart rate (HR), different groups of pentobarbitone-anesthetized normotensive and spontaneously hypertensive rats (SHR) were treated with intravenous HSYA (0.1-3mg/kg). ...
Belock B - - 2011
It can be a challenge to find a conventional saddle that is a good fit for both horse and rider. An increasing number of riders are purchasing treeless saddles because they are thought to fit a wider range of equine back shapes, but there is only limited research to support ...
Moscato Francesco - - 2011
In heart failure, diastolic dysfunction is responsible for about 50% of the cases, with higher prevalence in women and elderly persons and contributing similarly to mortality as systolic dysfunction. Whereas the cardiac systolic diagnostics in ventricular assist device patients from pump parameters have been investigated by several groups, the diastolic ...
Sakiewicz Wojciech - - 2011
OBJECTIVES:: To our knowledge, no population study described the association of the radial and longitudinal components of left ventricular strain with blood pressure (BP) components in continuous analyses. We therefore investigated these associations in participants randomly recruited from the general population in the framework of the family-based European Project on ...
Rohrmeier Christian - - 2011
The aim of this study was to find out whether objective analysis of snoring sounds (sound pressure level and psychoacoustic parameters) correlates with the subjective rating by participants with respect to perceived annoyance and hence whether it is useful. 43 participants, aged 22-65 years with normal hearing, were asked to rate ...
Bharucha A E - - 2012
While bowel and bladder dysfunction are recognized consequences of a radical hysterectomy, the effects of a simple hysterectomy on anorectal sensorimotor functions, particularly rectal sensation, vary among studies and the effects on rectal compliance remain unknown. Our aims were to prospectively evaluate anorectal sensorimotor functions before and after a hysterectomy. ...
de Jong Femke F Division of Neonatology, Department of Pediatrics, VU University Medical Center, Amsterdam, The - - 2012
Lower birth weight because of fetal growth restriction is associated with higher blood pressure later in life, but the extent to which preterm birth (<37 completed weeks' gestation) or very low birth weight (<1500 g) predicts higher blood pressure is less clear. We performed a systematic review of 27 observational ...
Lee Avione Y - - 2012
Tortuous arteries are often associated with aging, hypertension, atherosclerosis, and degenerative vascular diseases, but the mechanisms are poorly understood. Our recent theoretical analysis suggested that mechanical instability (buckling) may lead to tortuous blood vessels. The objectives of this study were to determine the critical pressure of artery buckling and the ...
Kang Jun Hyuk - - 2011
Central pulse pressure is correlated with carotid atherosclerosis and the incidence of cardiovascular events more significantly than brachial pulse pressure. Augmentation index (Aix) has been shown to be an independent predictor of cardiovascular morbidity and mortality. Pulse wave analysis using the Gaon system allows for the estimation of central blood ...
Aouadhi C - - 2012
Bacillus sporothermodurans produces highly resistant endospores that can survive ultra-high-temperature treatment in milk. The induction of endospore germination before a heat treatment could be an efficient method to inactivate these bacteria and ensure milk sterility. In this work, the rate of spore germination of B. sporothermodurans LTIS27 was measured in distilled ...
Hemmingsson Tryggve E - - 2012
Airway nitric oxide (NO) has been proposed to play a role in the development of high-altitude pulmonary edema. We undertook a study of the effects of acute changes of ambient pressure on exhaled and alveolar NO in the range 0.5-4 atmospheres absolute (ATA, 379-3,040 mmHg) in eight healthy subjects breathing ...
Urbano Javier - - 2011
BACKGROUND: The mechanism of high-flow oxygen therapy and the pressures reached in the airway have not been defined. We hypothesize that flow would generate continuous positive pressure is low, and that elevated flow rates in this model could produce moderate pressures. The objective of this study is to analyze the ...
Toussaint Michel - - 2011
BACKGROUND: Despite potential benefits of intrapulmonary percussive ventilation (IPV) in various respiratory diseases, the impact of setting parameters on the mechanical effects produced by IPV into the lungs is unknown. We hypothesized that changing the parameters on IPV modulate these effects. This in vitro study aimed at comparing the changes ...
Booker Corenthian J - - 2012
We prospectively correlated the 24-hour ambulatory blood pressure measurements (ABPM) to conventional sphygmomanometer blood pressure measurements (CSM) in women at risk for gestational hypertensive disorders (GHTNDs) and identified predictive factors from ABPM for GHTND. We analyzed 73 women with ≥ 1 risk factor for developing a GHTND. Using both the ...
Kopping Dana - - 2011
This longitudinal study examined the rates of overweight, elevated blood pressure, acanthosis nigricans, and their associated factors in third through fifth grade students over 4 years. Participants consisted of 279 students who participated in health screenings in 2002 and 2006. Hispanic students had significantly higher rates of overweight and acanthosis ...
Willems Tine Marieke - - 2011
The purpose of this study was to assess plantar pressure alterations after long-distance running. Prior to and after a 20km run, force distribution underneath the feet of 52 participants was registered using Footscan(®) pressure plates while the participants ran shod at a constant self-selected pace. Peak force, mean force and ...
Banham Neil Dg - - 2011
Oxygen toxicity seizures (OTS) are a known complication of hyperbaric oxygen therapy (HBOT). The incidence of OTS has been variously reported and appears to be related to the duration and pressure of exposure in addition to individual susceptibility factors. All OTS occurring in patients undergoing HBOT during the first 20 ...
Segal Nicolas - - 2011
Intrathoracic pressure regulation (IPR) has been used to treat hypotension and states of hypoperfusion by providing positive pressure ventilation during inspiration followed by augmentation of negative intrathoracic pressure during expiration. This therapy augments cardiac output and lowers intracranial pressure, thereby providing greater circulation to the heart and brain. The effects ...
Mazza A - - 2011
In high-risk hypertensive subjects (HTs) with incidental unilateral renal artery stenosis (RAS), the effectiveness of percutaneous revascularization with stent (PR-STENT) on blood pressure (BP) and glomerular filtration rate (GFR) is not established. Eighteen HTs aged 65.7±9.2 years with angiographically diagnosed unilateral RAS (≥60%) were randomized to receive PR-STENT (N=9) or ...
Shiue Ivy - - 2011
High blood pressure (BP) is a major risk factor for stroke and all of its pathological subtypes including subarachnoid hemorrhage (SAH). However, there is little evidence demonstrating whether failure to have regular BP measured could result in underestimation of people at risk for SAH. Therefore, we aimed to estimate the ...
Digilov Rafael M - - 2011
We describe an unsteady pressure-driven capillary viscometer, in which the liquid under test is forced through a capillary tube by compressed-air pressure. The principle of operation involves measurement of the driving pressure versus time that decays progressively as the fluid flows and covers continuously a broad shear rate range in ...
Pereira Carla M - - 2011
Swimming effort of hatchling sea turtles varies across species. In this study we analysed how swim thrust is produced in terms of power stroke rate, mean maximum thrust per power stroke and percentage of time spent power stroking throughout the first 18 h of swimming after entering the water, in ...
Ruschitzka Frank - - 2011
Hypertension constitutes a major risk factor for an array of cardiovascular diseases. Rates of morbidity and mortality related to its complications are high and remain an important concern in terms of public health. Improvement in cardiovascular outcomes and survival is an ultimate goal of the antihypertensive treatment. However, despite the ...
Scheperle Rachel A - - 2011
Quantifying ear-canal sound level in forward pressure has been suggested as a more accurate and practical alternative to sound pressure level (SPL) calibrations used in clinical settings. The mathematical isolation of forward (and reverse) pressure requires defining the TheĢvenin-equivalent impedance and pressure of the sound source and characteristic impedance of ...
Erbel Raimund - - 2011
Prehypertension is a frequent condition and has been demonstrated to increase cardiovascular risk. However, the association with coronary atherosclerosis as part of target organ damage is not well understood. We investigated the cross-sectional relationship and longitudinal outcome between blood pressure categories and coronary artery calcification (CAC), quantified by electron beam ...
Wells Ellen M - - 2012
Evidence suggests selenium concentrations outside the nutritional range may worsen cardiovascular health. This paper examines the relationship between selenium and maternal blood pressure (BP) among 270 deliveries using umbilical cord serum as a proxy for maternal exposure levels. Multivariable models used linear splines for selenium and controlled for gestational age, ...
Granone Tiffany D - - 2011
Objective  To compare isoflurane, sevoflurane and desflurane for inhalant anesthesia in red-tailed hawks (Buteo jamaicensis) in terms of the speed and characteristics of induction; cardiovascular and respiratory parameters while anesthetized; and speed and quality of recovery. Study design  Prospective, cross over, randomized experimental study. Animals  12 healthy adult red-tailed hawks. ...
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