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Genc Sahika - - 2011
A model-based approach that integrates known portion of the cardiovascular system and unknown portion through a parameter estimation to predict evolution of the mean arterial pressure is considered. The unknown portion corresponds to the neural portion that acts like a controller that takes corrective actions to regulate the arterial blood ...
Olufsen Mette S - - 2011
The impact of gravity during head-up tilt, a test often used in the clinic to diagnose patients who suffer from dizziness or frequent episodes of syncope, is not well described. This study uses mathematical modeling to analyze experimental blood pressure data measured at the level of the aorta and the ...
Ferrario Manuela - - 2011
In this paper, we propose the use of black box models for the system identification of the cardiopulmonary baroreflex control of arterial resistance and of ventricular contractility and of arterial baroreflex control of heart rate (HR) from invasive, continuous measurements of arterial blood pressure (ABP) and central venous pressure (CVP), ...
Imaizumi Kazuya - - 2011
In order to develop an evaluation system for foot arch type in the elderly using foot pressure distribution data, foot pressure distribution parameters were selected and the data thereby derived were discussed. Results from the study show that the midfoot area and pressure ratios were correlated to foot arch type ...
Anderson Carlin M - - 2011
In this study, we tested Petrie and Greenleaf's (2007) model of bulimic symptoms in two independent samples of female collegiate swimmers/divers and gymnasts. Structural equation modeling revealed support for the model, although it also suggested additional pathways. Specifically, general societal pressures regarding weight and body were related to the internalization ...
Zhang Guanqun - - 2011
We proposed a technique for estimating beat-to-beat pulse transit time (PTT) from central and peripheral blood pressure or flow waveforms based on an arterial tube-load model of wave reflection. The technique effectively estimates PTT from the entire waveforms after mathematically eliminating the reflected wave. So, unlike the conventional foot-to-foot detection ...
Kao Danny Tengti - - 2011
Kao, D. T. (2011). Message sidedness in advertising: The moderating roles of need for cognition and time pressure in persuasion. Scandinavian Journal of Psychology 52, 329-340. Persuasion has been extensively researched for decades. Much of this research has focused on different message tactics and their effects on persuasion (e.g., Chang ...
Shiao Chih-Chung - - 2011
Case study: Mr Lin, a Chinese man aged 38 years, presented for review of a recent chest X-ray. The X-ray was ordered as part of a pre-employment assessment. He was asymptomatic, a nonsmoker and had no significant past medical history. Full blood examination, lipids, glucose and liver and renal function ...
Mendez Guadalupe Dorantes - - 2011
This paper presents the analysis of the autonomic nervous system (ANS) control and cardiac baroreflex sensitivity in patients undergoing general anesthesia for major surgery, with the goal of evaluating the effects of anesthesia bolus induction with propofol on autonomic control of heart rate (HR) and arterial blood pressure (ABP). The ...
Feringa Harm H H - - 2011
Recent animal studies have suggested that grape seed extract has beneficial effects on the cardiovascular system. Randomized trials in human beings have yielded conflicting results. The objective of this systematic review was to assess the effect of grape seed extract on changes in blood pressure, heart rate, lipid levels, and ...
D'Orazio A - - 2011
The diffusion of window frames with low air permeability, due to the energy saving regulations, has implied in several cases the worsening of the indoor microclimate and air quality. On the other hand, air-tight window frames imply uncontrolled and too high air change rates. The mechanical ventilation not always is ...
Fattal-Valevski Aviva - - 2011
Epidemiological studies have found that intrauterine growth retardation (IUGR) is closely related to hypertension and is associated with a reduced number of nephrons that may be a predisposing factor for the development of hypertension. To determine whether blood pressure levels of children with a history of IUGR are higher than ...
Miura H - - 2011
Rotary blood pumps which have contact-less suspension are small, durable and widely used for left ventricular assist devices (LVADs). In order to design a total artificial heart (TAH) with rotary blood pumps, two pumps one for each ventricle, are controlled independently. Some of the challenges for the development of a ...
Anjum B - - 2011
Recent studies indicate a circadian rhythm in blood pressure and heart rate and its association with various neurotransmitters. In the present study, we examine the circadian nature of blood pressure/heart rate and salivary cortisol in night shift workers and whether these circadian changes produced by night shifts are reversible. Sixteen ...
Logier R - - 2011
Pneumatic tourniquets are widely used to provide a bloodless operative field during upper or lower limb surgery. If tourniquet inflation during general anesthesia is initially a mild stimulus, a long duration of inflation can imply heart rate and blood pressure increasing. However, heart rate or blood pressure increasing can also ...
Morton A J - - 2011
N-butylscopolammonium bromide (NBB) and xylazine are commonly used medications for the treatment of spasmodic colic and other forms of abdominal pain in horses. Both NBB and xylazine exert significant effects on the cardiovascular system and other vital systems of horses. To evaluate the effects of i.v. administration of NBB, xylazine, ...
Kushida Clete A - - 2011
(1) To determine the efficacy of automatically adjusted positive airway pressure (APAP) with a comfort feature (A-Flex) at reducing apneas and hypopneas in participants with moderate to severe OSA. (2) To determine the relative difference between A-Flex, continuous positive airway pressure (CPAP), and APAP-derived optimal pressure for CPAP (CPAP(APAP)) on ...
Lan Wen-Jie - - 2011
Ion current rectification that occurs in conical-shaped glass nanopores in low electrolyte solutions is shown to be dependent on the velocity of pressure-driven electrolyte flow through the nanopore, decreasing with increasing flow rates. The dependence of the i-V response on pressure is due to the disruption of cation and anion ...
Turianikova Zuzana - - 2011
Cardiovascular control acts over multiple time scales, which introduces a significant amount of complexity to heart rate and blood pressure time series. Multiscale entropy (MSE) analysis has been developed to quantify the complexity of a time series over multiple time scales. In previous studies, MSE analyses identified impaired cardiovascular control ...
Pandolfino John E - - 2011
Whereas conventional manometry depicts peristalsis as pressure variation over time, high-resolution manometry makes it equally feasible to depict pressure variation along the lumen (spatial pressure variation plots). This study analyzed the characteristics of spatial pressure variation plots during normal peristalsis. High-resolution manometry studies of 72 normal subjects were analyzed with ...
Williams Michelle A - - 2011
We evaluated the influence of physician-diagnosed migraine on blood pressure levels and the risk of hypertensive disorders of pregnancy in a clinic-based prospective cohort study of 3373 healthy pregnant women. The relationship between migraine and blood pressure is controversial with results from several studies suggesting positive associations, while others suggest ...
Dutta Debashis - - 2011
Microchannels in microfluidic devices are frequently chemically modified to introduce specific functional elements or operational modalities. In this work, we describe a miniaturized hydraulic pump created by coating selective channels in a glass microfluidic manifold with a polyelectrolyte multilayer (PEM) that alters the surface charge of the substrate. Pressure-driven flow ...
Meuret Alicia E - - 2011
Spontaneous or unexpected panic attacks, per definition, occur "out of the blue," in the absence of cues or triggers. Accordingly, physiological arousal or instability should occur at the onset of, or during, the attack, but not preceding it. To test this hypothesis, we examined if points of significant autonomic changes ...
Westerhof Berend E - - 2011
The enhanced heart rate and blood pressure soon after awaking increases cardiac oxygen demand, and has been associated with the high incidence of acute myocardial infarction in the morning. The behavior of cardiac oxygen supply is unknown. We hypothesized that oxygen supply decreases in the morning and to that purpose ...
Gao Shu-Guang - - 2011
Object With the increasing advocacy for total disc replacement (TDR) as a potential alternative to fusion in the management of lumbar degenerative disc disease, intradiscal pressures (IDPs) and facet joint stresses at the adjacent levels of spine have generated considerable interest. The purpose of this study was to compare adjacent-level ...
Han Jin-Yi - - 2011
In a previous experiment, (-)-epigallocatechin-3-O-gallate (EGCG) reduced caffeine-induced locomotor activity and stereotyped behaviours and inhibited caffeine-induced neuronal stimulant activity. This research was performed to give additional evidence that EGCG counteracts caffeine-induced stimulant effects in animals. EGCG inhibited caffeine-induced cardiovascular activation measures, such as arterial pressure (AP) and heart rate (HR). ...
Iwasaki Mariko - - 2011
Left ventricular (LV) twist is thought to play an important role in cardiac function. However, how twist affects systolic or diastolic function is not understood in detail. We acquired apical and basal short axis images of dogs undergoing open-chest procedures (n = 15) using a GE Vivid 7 at baseline ...
Cairns Andrew Brian - - 2011
We show that KMn[Ag(CN)2]3 exhibits the strongest negative linear compressibility (NLC) effect over the largest pressure range yet observed. Variable pressure neutron powder diffraction measurements reveal that its crystal lattice expands along the c axis of its trigonal cell under increasing hydrostatic pressure, whilst contracting along the a axis. This ...
Tonpheng Bounphanh - - 2011
The thermal conductivity κ, heat capacity per unit volume ρc(p) and glass transition behaviour under pressure have been established for medium and high vinyl content polybutadiene PB with molecular weights 2600 and 100 000 and their highly cross-linked (ebonite) states obtained purely by high-pressure high-temperature treatments. Cross-linking eliminates the glass transitions ...
Belda Eliseo - - 2011
Balanced anaesthesia techniques employ specific drugs in addition to general anaesthetics. The potential effect of some of these drugs on the bispectral index (BIS) remains unclear. BIS seems to be unaffected by the administration of neuromuscular blockers while opioids may block nociceptive-induced BIS increases in anaesthetized humans. In this study, ...
Moore Michael John - - 2011
Lung compression of vertebrates as they dive poses anatomical and physiological challenges. There has been little direct observation of this. A harbor and a gray seal, a common dolphin and a harbor porpoise were each imaged post mortem under pressure using a radiolucent, fiberglass, water-filled pressure vessel rated to a ...
Rezai Mohammad-Reza - - 2011
The objective of this study was to compare central systolic blood pressure (cSBP) and augmentation index (AIx) from two recently introduced devices, Omron HEM-9000 (OM) and Arteriograph (AG), not using a transfer function with those of the widely used SphygmoCor (SC) calibrated on brachial blood pressure like OM. Random-order manufacturer-recommended ...
Hu Liming - - 2011
Air sparging (AS) is one of the groundwater remediation techniques for remediating volatile organic compounds (VOCs) in saturated soil. However, in spite of the success of air sparging as a remediation technique for the cleanup of contaminated soils, to date, the fundamental mechanisms or the physics of air flow through ...
Meissner Karin - - 2011
There is increasing evidence that verbal suggestions accompanying placebo interventions can alter autonomic functions. The underlying mechanisms of these changes are not well understood. However, previous studies point at the specificity of such effects. The aim of the experiment was to lower blood pressure by a placebo intervention and to ...
Radstaak Mirjam - - 2011
This study examined the psychological processes that may impede or facilitate cardiovascular recovery. It was hypothesized that cardiovascular recovery would be hampered by negative affect and rumination, and facilitated by positive affect. In an experimental study, stress was elicited by exposing participants (N=110) to a mental arithmetic task with harassment. ...
Gaffin Robert D - - 2011
The effects of nicotine (NIC) on normal hearts are fairly well established, yet its effects on hearts displaying familial hypertrophic cardiomyopathy have not been tested. We studied both the acute and chronic effects of NIC on a transgenic (TG) mouse model of FHC caused by a mutation in α-tropomyosin (Tm; ...
Chun Jonathan - - 2011
Purpose. The aim of this study was to compare characteristics of rectal compression and stapled anastomoses at multiple time points. Methods. A total of 50 domestic pigs underwent a rectal anastomosis with a compression device or a circular stapler. They were sacrificed at zero-time, 2 days, 1 week, 1 month, ...
Zheng Dingchang - - 2011
Cuff pressure deflation rate influences blood pressure (BP) measurement. However, there is little quantitative clinical evidence on its effect. Oscillometric pulses recorded from 75 subjects at the recommended deflation rate of 2-3 mmHg per second were analyzed. Some pulses were removed to realize six faster rates (2-7 times faster than ...
Liu Hui - - 2011
Microscopy of subpleural alveoli has become an important technique to analyze alveolar morphology during mechanical ventilation. Mere contact of a microscope with the lung, however, may alter the local pressure at the pleural surface and thus the transmural pressure of the alveoli under view. The effect of local pleural pressure ...
Bloom C A - - 2012
Fenoldopam is a selective dopamine-1 receptor agonist that causes peripheral arterial vasodilation, increased renal blood flow, and diuresis. Enthusiasm exists for the use of fenoldopam in nonpolyuric kidney injury in dogs, although pharmacokinetic data are lacking. The purpose of this study was to collect basic pharmacokinetic and hemodynamic effect data ...
Delius S von - - 2011
BACKGROUND AND AIMS: The aim of this randomized trial in the acute porcine model was to compare the quality of transgastric peritoneoscopy with the use of low-pressure versus standard-pressure pneumoperitoneum and to evaluate the respective associated cardiopulmonary changes. METHODS: For transgastric peritoneoscopy, carbon dioxide was insufflated via the endoscope for ...
Brummett Beverly H - - 2011
In the National Longitudinal Study of Adolescent Health, a US longitudinal study of >15 000 young adults, we examined the extent to which socioeconomic status is linked to systolic blood pressure (SBP) and whether biobehavioral risk factors mediate the association. More than 62% of the participants had SBP >120 mm ...
Iranmanesh Sedigheh - - 2011
Pressure ulcer prevention needs nurses' awareness of sore classification/onset, its item characteristics, and its prevention. Using Pieper's Pressure Ulcer Knowledge Test, 126 critical care nurses' knowledge about pressure ulcer was examined. The questionnaire was divided into three categories including: (1) sore classification/onset; (2) wound characteristics, and (3) preventive measure. The ...
Wan Li - - 2011
Long-term confinement and microgravity may entail alteration in the regulation of the cardiovascular system. A 105-d pilot study of a Mars mission simulation was conducted to test the cardiovascular response to slow-paced breathing and mental stress. Finger blood pressure and beat-to-beat heart rate were monitored in six male volunteers taking ...
Chakraborty Ranjay - - 2011
To investigate the pattern of diurnal variations in axial length (AL), choroidal thickness, intraocular pressure (IOP), and ocular biometrics over 2 consecutive days. Measurements of ocular biometrics and IOP were collected for 30 young adult subjects (15 myopes, 15 emmetropes) at 10 different times over 2 consecutive days. Five sets ...
Rose L - - 2011
Our objective was to describe, in Australian and New Zealand adult intensive care units, the relative frequency in which various clinical criteria were used to predict weaning and extubation, and the weaning methods employed. Participant intensivists at 55 intensive care units completed a self-administered questionnaire, using visual analogue scales (0 ...
National Association Of Ems - - 2011
Abstract The National Association of EMS Physicians (NAEMSP) believes that noninvasive positive pressure ventilation (NIPPV) is an important treatment modality for the prehospital management of acute dyspnea. This document is the official position of the NAEMSP.
Halldorsdottir Valgerdur G - - 2011
Our group has proposed the concept of subharmonic aided pressure estimation (SHAPE) utilizing microbubble-based ultrasound contrast agent signals for the noninvasive estimation of hydrostatic blood pressures. An experimental system for in vitro SHAPE was constructed based on two single-element transducers assembled confocally at a 60 degree angle to each other. ...
Sharma Dp - - 2011
Autonomic dysreflexia due to distended bladder is well known. Reflux of blood during endovascular procedure is also a common observation. It happens due to difference in pressure gradient between arterial pressure and that of infusing solution. Generally it happens when the infusion bottle is empty or the pressure in infusion ...
Tsai Chien-Tsung - - 2011
Cervical traction is a physical therapy procedure frequently used to treat cervical disk lesions, cervical spondylosis, and cervical facet joint lesions. We have observed rare cases of side effects in elderly patients, but not in women younger than 30 years.In this pilot study, 96 young women were randomly divided into ...
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