Search Results
Results 1 - 50 of 1233
1 2 3 4 5 6 7 8 9 10 >
James Gary D GD Department of Anthropology - - 2014
Abstract Background: Studies show that stress perception is associated with increased daily ambulatory blood pressure (BP) and that denying the negative effects of stress increases BP as well. Whether these effects persist over the menstrual cycle is unknown. Aim: To examine the effects of measures of stress and stress denial ...
Baden Jeffrey R JR Department of Biology, Faculty of Science and Technology, Mount Royal University, Calgary, Alberta, - - 2014
Baden JR, Abrosimova M, Boulet LM, Tymko MM, Pfoh JR, Skow RJ, Day TA. Extreme respiratory sinus arrhythmia in response to superimposed head-down tilt and deep breathing. Aviat Space Environ Med 2014; 85:1222-8. Respiratory sinus arrhythmia (RSA) is characterized by normal fluctuations in heart rate in phase with the respiratory ...
Torres Susan J SJ Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Victoria, - - 2014
Background: To determine the effect of adiposity in males aged 50-70 years on cardiovascular responses to acute psychological stress. Methods: Lean (BMI 20-25 kg/m(2)) (n = 21) and overweight/obese (BMI 27-35 kg/m(2)) (n = 21) men aged 50-70 years were subjected to psychological stress. Systolic blood pressure, diastolic blood pressure, ...
Xiong Huahua - - 2014
Blood pressure (BP) is associated with early atherosclerosis and plaque rupture because the BP variability can significantly affect the blood flow velocity and shear stress over the plaque. However, the mechanical response of BP variability to the plaque remains unclear. Therefore, we investigated the correlation between different maximum systolic blood ...
Park Ji Hoon - - 2014
We proposed a simple method to deposit vertically graded-oxygen-vacancy active layer (VGA) to enhance the positive bias stress (PBS) stability of amorphous indium gallium zinc oxide (a-IGZO) thin-film transistors (TFTs). We deposited a-IGZO films by sputtering (target composition; In2O3:Ga2O3:ZnO = 1:1:1 mol %) and the oxygen partial pressure was varied ...
Numata T T Takashi Numata, Graduate School of Frontier Science, The University of Tokyo #303, Building 4, RCAST, 4-6-1 Komaba, Meguro, Tokyo 153-8904, Japan, E-mail: - - 2014
Background: Evaluating the accurate responses of the cardiovascular system to external stimuli is important for a deeper understanding of cardiovascular homeostasis. However, the responses should be distorted by the conventional time domain analysis when a frequency of the effect of external stimuli matches that of intrinsic fluctuations. Objectives: The purpose ...
Wu Jianhuang J a Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , 1068 Xueyuan Boulevard, Xili Nanshan, Shenzhen 518055 , P.R. - - 2014
In this paper, we have analysed pulsatile flow through partially occluded elastic arteries, to determine the haemodynamic parameters of wall shear stress (WSS), wall pressure gradient and pressure drops (ΔP), contributing to enhanced flow resistance and myocardial ischaemic regions which impair cardiac contractility and cause increased work load on the ...
Le Merrer Marie M Université Paris 6, UMR 7588 CNRS-UPMC, INSP, 4 place Jussieu, 75005 Paris, France. - - 2014
We study the wall slip of aqueous foams with a high liquid content. We use a set-up where, driven by buoyancy, a foam creeps along an inclined smooth solid wall which is immersed in the foaming solution. This configuration allows the force driving the bubble motion and the bubble confinement ...
Maeda Eri E Department of Environmental Health Sciences, Akita University Graduate School of Medicine, - - 2014
Autonomic imbalance is one of the important pathways through which psychological stress contributes to cardiovascular diseases/sudden death. Although previous studies have focused mainly on stress at work (work stress), the association between autonomic function and stress at home (home stress) is still poorly understood. The purpose was to clarify the ...
Han Mina M Department of Molecular Design & Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. - - 2014
A new azobenzene-based chromophore was synthesized to create one-dimensional (1D) nanofibers with aggregation-induced emission enhancement characteristics. The enhanced red fluorescence of the fibrous structures can be switched off via mechanical pressure, friction, or heat by pressing, rubbing, or annealing.
Cong Yan Y Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, - - 2014
Soft tissue injuries, such as anterior cruciate ligament rupture, ankle sprain and foot skin problems, frequently occur during cutting maneuvers. These injuries are often regarded as associated with abnormal joint torque and interfacial friction caused by excessive external and in-shoe shear forces. This study simultaneously investigated the dynamic in-shoe localized ...
Gor Gennady Yu - - 2014
Knowledge of the elastic properties of a fluid is crucial for predicting its flow under high pressure, particularly in porous media. However, when a fluid is confined to a nanopore, many of its thermodynamic properties change as compared to bulk. Here we study the effect of confinement on the bulk ...
Kang Seonmi S Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, - - 2014
To optimize fluid dynamics through measuring intraocular pressure (IOP) in a venturi phacoemulsification machine in dogs. In step I, flow and IOP of the test chamber were measured using a pressure transducer with the bottle height (BH) set at 50, 70, 100, and 120 cm and the vacuum from 30 to ...
Zhang Qingguang Q Department of Biomedical Engineering, University of Kentucky, 143 Graham Avenue, Lexington, KY, 40506-0108, - - 2014
We investigated whether and how cardiovascular and cardiorespiratory phase synchronization would respond to changes in hydration status and orthostatic stress. Four men and six women were tested during graded head-up tilt (HUT) in both euhydration and dehydration (DEH) conditions. Continuous R-R intervals (RRI), systolic blood pressure (SBP) and respiration were ...
Malan Leoné L Hypertension in Africa Research Team (HART), North-West University, Potchefstroom Campus, South Africa, Department of Epidemiology and Public Health, University College London, London, UK, Department of Psychiatry and School of Nursing, McGill University, Montreal, QC, Canada, Centre Hospitalier de l'Université de Montréal and Montreal Heart Institute Research Center, Montreal, QC, Canada and Statistical Consultation Services, North-West University, Potchefstroom Campus, South Africa - - 2014
Adapting to an over-demanding stressful urban environment may exhaust the psychophysiological resources to cope with these demands, and lead to sympathetic nervous system dysfunction. The evidence that an urban-dwelling lifestyle may be detrimental to the cardiometabolic health of Africans motivated the design of the Sympathetic activity and Ambulatory Blood Pressure ...
Laszczak P P Faculty of Engineering and the Environment, University of Southampton, - - 2014
A novel capacitance-based sensor designed for monitoring mechanical stresses at the stump-socket interface of lower-limb amputees is described. It provides practical means of measuring pressure and shear stresses simultaneously. In particular, it comprises of a flexible frame (20mm×20mm), with thickness of 4mm. By employing rapid prototyping technology in its fabrication, ...
Yang Fan F Geological and Environmental Sciences, Stanford University, Stanford, California 94305, - - 2014
The high-pressure behavior of diamantane was investigated using angle-dispersive synchrotron x-ray diffraction (XRD) and Raman spectroscopy in diamond anvil cells. Our experiments revealed that the structural transitions in diamantane were extremely sensitive to deviatoric stress. Under non-hydrostatic conditions, diamantane underwent a cubic (space group Pa3) to a monoclinic phase transition ...
Goliaei Ardeshir - - 2014
We performed a series of coarse-grained computer simulations in order to study how the placement of melittin and magainin-h2 antimicrobial peptides on the surface of the bilayer change the local pressure profiles in the bilayer. The simulations were done using the NPT ensemble when the total stress on the bilayer ...
Bao Le-Le LL Department of Anesthesiology, 153 Hospital of People's Liberation Army, Zhengzhou, Henan 450002, - - 2014
Psychological stress is strain affecting the intangible self, caused by problems in adaptation, perception, and emotions. Previous studies have demonstrated that arginine vasopressin (AVP) plays an important role in psychological stress. The goal of present study was to investigate the interaction between AVP release and cardiovascular functions by measuring AVP ...
Okada Yoko Y From the Department of Geriatrics and Neurology, Ehime University Graduate School of Medicine, Toon-City, Ehime, Japan (Y.O., K.K., M.O., T.N., M.I., T.M.); and Department of Medical Genetics, Kyoto University Graduate School of Medicine, Kyoto, Japan - - 2014
Arterial stiffness, a risk factor of brain small vessel diseases (SVD), causes hemodynamic changes. Mechanical stresses, circumferential wall tension (WT), and shear stress (SS) may change with arterial stiffness and be related to SVD. We investigated the associations between mechanical stresses and arterial stiffness and SVD. A total of 1296 ...
Shaked Sivan S Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University, 69978, Tel Aviv, - - 2014
Adenomyosis is a disease in which ectopic endometrial glands and stromal cells appear in the uterine myometrium. This pathology is common among women of reproductive age, and in addition to chronic pelvic pain and heavy periods it may also cause infertility. The 'tissue injury and repair' mechanism in response to ...
Queisser Nina N Institute of Pharmacology and Toxicology, University of Würzburg, Würzburg, - - 2014
Mineralocorticoid receptor blockers show antifibrotic potential in hepatic fibrosis. The mechanism of this protective effect is not known yet, although reactive oxygen species seem to play an important role. Here, we investigated the effects of elevated levels of aldosterone (Ald), the primary ligand of the mineralocorticoid receptor, on livers of ...
Tomiyama Hirofumi H Second Department of Internal Medicine, Tokyo Medical University, Japan; - - 2014
We determined whether any significant association exists between change in late systolic cardiac load with time, estimated by radial pressure waveform analysis, and development of cardiac hemodynamic stress in individuals with preserved cardiac function. Brachial-ankle pulse wave velocity, radial augmentation index (rAI), first peak of the radial pressure waveform (SP1), ...
Mathew Paul G PG Brigham and Women's Hospital, Department of Neurology, John R. Graham Headache Center, Boston, MA, USA, - - 2014
Low intracranial pressure headaches can, at times, be refractory to treatment including multiple blood patches and preventative medications. Imaging studies are often unable to demonstrate a cerebrospinal fluid leak that is causing headache and other associated symptoms. Onabotulinum toxin A (BTX) injection is a treatment that has proven efficacy for ...
Chang Ching-Min CM Institute of Environmental Engineering, National Chiao Tung University, Hsinchu, - - 2014
Fluid-filled granular soils experience changes in total stress because of earth and oceanic tides, earthquakes, erosion, sedimentation, and changes in atmospheric pressure. The pore volume may deform in response to the changes in stress and this may lead to changes in pore fluid pressure. The transient fluid flow can therefore ...
Cheng Jason J *Khoo Teck Puat Hospital, Singapore, Singapore †Mechanical and Industrial Engineering Department §Department of Ophthalmology, University of Toronto5and Department of Ophthalmology, Toronto Western Hospital, Toronto, ON, Canada ‡Institut Català de la Retina, Barcelona, - - 2014
To determine the pressure required to prime an Ahmed Glaucoma Valve (AGV) and determine whether the valve can be damaged by "over-priming pressure." Three AGVs, a syringe pump, and a manometer were used to assess priming pressure. Balanced salt solution was pumped through the AGV tube at increasing pressures until ...
Wightman JoLynne D JD Central Michigan University, 106A Wightman Hall, Mt. Pleasant, MI, - - 2014
Cardiovascular disease is a leading cause of death globally. Many cardiovascular risk factors can be modified through lifestyle modification, including dietary patterns that emphasize daily consumption of a variety of fruits and vegetables. Recent observational and clinical studies suggest that flavonoids, especially those abundant in grapes and other berries, may ...
Bonilla Alvaro G AG Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, - - 2014
To determine ex vivo contact data on the equine medial tibial plateau loaded by an intact medial femoral condyle (MFC), by an MFC with an osteochondral defect, and with a screw inserted in lag fashion through the MFC defect. Ex vivo experiment. Stifles (n = 6). Horses (n = 4). Stifle joints were axially ...
Brothers R Matthew RM University of Texas at - - 2014
Volume loading normalizes tolerance to a simulated hemorrhagic challenge during heat stress, relative to thermoneutral conditions; however, the mechanism(s) are unknown. This project tested two unique hypotheses; the elevation of central blood volume via volume loading while heat stressed would: 1) increase left ventricular diastolic function, and 2) preserve left ...
Radstaak Mirjam M From the Behavioural Science Institute (M.R., S.A.E.G., M.A.J.K.), Radboud University Nijmegen, Nijmegen, the Netherlands; and Institute of Psychology (J.F.B.), Leiden University, Leiden, the - - 2014
This experimental study examined whether listening to self-chosen music after stress exposure improves mood, decreases subjective arousal and rumination, and facilitates cardiovascular recovery. Participants (N = 123) were exposed to a mental arithmetic task with harassment to induce stress. Afterward, participants were randomly assigned to one of four "recovery" conditions ...
Sardarian Ahmadreza - - 2014
The ideal built-in tip and torque values of the straight wire appliance reduce the need for wire bending and hence reduce chair time. The vertical position of the bracket on the tooth surface can alter the torque exerted on the tooth. This is a result of the altered surface curvature ...
Field Tiffany T Touch Research Institute, University of Miami Medical School, USA; Fielding Graduate University, USA. Electronic address: - - 2014
Moderate pressure massage has contributed to many positive effects including increased weight gain in preterm infants, reduced pain in different syndromes including fibromyalgia and rheumatoid arthritis, enhanced attentiveness, reduced depression and enhanced immune function (increased natural killer cells and natural killer cell activity).Surprisingly, these recent studies have not been reviewed, ...
Rolfes Melissa A MA Department of Medicine, Medical School, University of Minnesota, Minneapolis, MN, - - 2014
 Cryptococcal meningitis is the most common cause of adult meningitis in sub-Saharan Africa. Raised intracranial pressure (ICP) is common in cryptococcosis. Prior studies suggest elevated ICP is associated with mortality, and guidelines recommend frequent lumbar punctures (LPs) to control ICP. However, the magnitude of the impact of LPs on cryptococcal-related ...
Phillips Rob R The School of Medicine, The University of Queensland, Brisbane, Australia, - - 2014
Fluid infusion is one of the most common critical care interventions, yet approximately 50 % of all fluid interventions are unnecessary and potentially harmful. An improved approach to identification of fluid responsiveness is of clinical importance. Currently fluid responsiveness is most frequently identified by blood pressure (BP) measurements or a surrogate. ...
Seibel C C Experimental Thermodynamics, Ruhr-University Bochum, Universitätsstr. 150, D-44801 Bochum, - - 2014
Inline process control by measurement of velocity of sound of fluids is a direct and comprehensive technique [J. D. N. Cheeke and Z. Wang, "Acoustic wave gas sensors," Sens. Actuators B 59, 146-153 (1999); J. W. Grate, S. J. Martin, and R. M. White, "Acoustic wave microsensors," Anal. Chem. 65, ...
Koike Marcia Kiyomi - - 2014
Abstract Coronary heart disease is the major cause of global cardiovascular mortality and morbidity. Lifestyle behaviour contributes as a risk factor: unhealthy diet, sedentary lifestyle, tobacco, alcohol, hypertension, diabetes, dyslipidemia and psychosocial stress. Atherosclerosis pathologic mechanisms involving oxidative stress, dyslipidemia, inflammation and senescence are associated with arterial wall damage and ...
Krishnakumar Deepa D Department of Paediatric Neurology, Addenbrooke's Hospital, Cambridge, - - 2014
Idiopathic intracranial hypertension (IIH) is prone to misdiagnosis. Our aim was to identify the reasons for this in children in our region referred for suspected IIH. We reviewed the records of all children referred with symptoms and/or signs consistent with raised intracranial pressure (ICP) and normal magnetic resonance imaging of ...
Park Jai Y JY Department of Anesthesiology and Pain Medicine, The Armed Forces Capital Hospital, Seoul, Rep. of - - 2014
Objective: Differences in the cardiovascular and hypothalamic-pituitary-adrenal (HPA) axis functions at high altitudes (HAs) between visitors to and natives of HA were examined. Methods: The cardiovascular functions and peripheral oxygen saturation (SPO2) were monitored, and the cortisol awakening response (CAR) and nighttime cortisol concentration (NCC), as indices of the HPA ...
Portaluppi Francesco - - 2014
In normal conditions, the temporal organization of blood pressure (BP) is mainly controlled by neuroendocrine mechanisms. Above all, the monoaminergic systems (including variations in activity of the autonomous nervous system, and in secretion of biogenic amines) appear to integrate the major driving factors of temporal variability, but evidence is available ...
Wisneski Andrew D - - 2014
Remodeling of the pulmonary autograft upon exposure to systemic pressure can lead to progressive dilatation and aneurysmal pathology. Remodeling is driven by changes in autograft wall stress upon exposure to systemic pressure; however, the magnitude of these changes is unknown. Previously, a porcine autograft finite element model was developed to ...
Drummond John C JC VA Medical Center, Anesthesia Service - 125, University of California, 3350 La Jolla Village Drive, San Diego, CA, 92161, USA, - - 2014
When positioning patients with meningocele and meningomyelocele, it is standard practice to avoid direct pressure on the lesions. That caution is intended to prevent injury to neural elements within the lesion and violation of the cerebrospinal fluid space. We herein report an additional hazard of direct intraoperative pressure on such ...
Verhaagen B B Physics of Fluids group and MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, P.O. Box 217, 7500AE Enschede, The - - 2014
Ultrasonically activated irrigation is an advanced dental technique for irrigation of the root canal system during a root canal treatment. The basic cleaning mechanism is a result of acoustic streaming induced by an oscillating file, leading to mixing of the irrigant and pressure and shear stresses on the walls of ...
Johansson Staffan B SB Micro and Nanosystems, KTH Royal Institute of Technology, Osquldas Väg 10, 10044, Stockholm, Sweden, - - 2014
This paper reports a novel micro electro mechanical system (MEMS) valve with posture controlled flow characteristics for improved treatment of hydrocephalus, a disease that is characterized by elevated pressure in the cerebrospinal fluid (CSF) that surrounds the brain and spinal cord. In contrast to conventional differential pressure CSF valves, the ...
Kawai Hisashi - - 2014
Objectives: Watertight dural closure is imperative after neurosurgical procedures because inadequately treated leakage of cerebrospinal fluid (CSF) can have serious consequences. In this study, the authors test the use of a new gelatin glue as a dural sealant in in vitro and in vivo canine models of transdural CSF leakage. ...
Wakerley Benjamin R BR Division of Neurology, National University Health System, - - 2014
Transcranial Doppler (TCD) ultrasonography is a noninvasive bedside tool that can evaluate cerebral blood flow hemodynamics in major intracranial arteries. TCD-derived pulsatility index (PI) is believed to be influenced by intracranial pressure (ICP). To correlate TCD-PI with cerebrospinal fluid (CSF) pressure (representing ICP), measured by standard lumbar puncture (LP) manometry. ...
Capel Cyrille - - 2014
Objectives: We studied possible link between cerebrospinal fluid (CSF) compensation and indices describing pulsatile inflow of cerebral arterial blood. Methods: A total of 50 infusion tests performed in patients with symptoms of normal pressure hydrocephalus (NPH) were examined retrospectively. Waveforms of CSF pressure, noninvasive arterial blood pressure (ABP), and transcranial ...
Archambault-Léger Véronique V Dartmouth College, Hanover, NH 03755, United States; DOE BioEnergy Science Center, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States. Electronic address: - - 2014
The present study investigates fluid mechanical properties of cellulosic feedstocks relevant to flow through (FT) pretreatment for biological conversion of cellulosic biomass. The results inform identifying conditions for which FT pretreatment can be implemented in a practical context. Measurements of pressure drop across packed beds, viscous compaction and water absorption ...
Tapolyai Mihály B MB Fresenius Medical Care, Semmelweis University, Budapest, Hungary; Department of Medicine, Division of Nephrology, WJB Dorn VA Medical Center, Columbia, South Carolina, - - 2014
Ultrafiltration (UF) is a common procedure performed during almost all dialysis sessions. During UF, several liters of fluid are removed; however, what proportion of this fluid is removed from which fluid space could not be clinically measured easily until now; we designed this study to evaluate the fluid spaces most ...
Sano Yuji Y Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa-noha, Chiba 277-8564, - - 2014
Geophysical evidence suggests that fluids along fault planes have an important role in generating earthquakes; however, the nature of these fluids has not been well defined. The 2011 magnitude 9.0 Tohoku-Oki earthquake ruptured the interface between the subducting Pacific plate and the overlying Okhotsk plate. Here we report a sharp ...
Graff-Radford Steven B SB Cedars-Sinai Medical Center, Los Angeles, CA, - - 2014
Headache resulting from idiopathic intracranial hypertension (IIH) in a population of moderately to obese women of childbearing age. The causes overall remain unclear. With this review, we provide an overview of clinical treatment and management strategies. IIH management is dependent on the signs and symptoms presented. Symptomatic treatment should attempt ...
1 2 3 4 5 6 7 8 9 10 >