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Results 401 - 450 of 1822
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Pal G K - - 2011
Objective. Though prehypertension has strong familial predisposition, difference in pathophysiological mechanisms in its genesis in offspring of both parents and single parent hypertensive have not been elucidated. Methods. Body mass index (BMI), waist-hip ratio (WHR), basal heart rate (BHR), blood pressure (BP), HR and BP response to standing, deep breathing ...
Inoue Kenji - - 2011
To prospectively evaluate the diurnal variation of intraocular pressure (IOP) during unoprostone treatment in 13 healthy volunteers. IOP was measured by Goldmann applanation tonometry by the same observer every 3 hours from 9 am to 9 am the next morning. Unoprostone was then instilled at 9 am and 9 pm ...
Roberts Langdon - - 2011
To increase the understanding of the physiological mechanisms by which massage therapy produces health benefits such as pain relief and anxiety reduction, the relationship between specific elements of massage and physiological outcomes must be addressed. The effects on resting muscular activity of applying varying levels of pressure during massage were ...
Gupta Shobhana - - 2011
To compare the effectiveness of single bolus dose of esmolol or fentanyl in attenuating the hemodynamic responses during laryngoscopy and endotracheal intubation. Ninety adult ASA I and ASA II patients were included in the study who underwent elective surgical procedures. Patients were divided into three groups. Group C (control) receiving ...
Hlebowicz Joanna - - 2011
Ingestion of a meal increases the blood flow to the gastrointestinal organs and affects the heart rate (HR), blood pressure and cardiac output (CO), although the mechanisms are not known. The aim of this study was to evaluate the effect of endogenously released glucose, insulin, glucagon-like peptide 1 (GLP-1), ghrelin ...
Nakamura Masayuki - - 2011
This paper describes wireless wearable and ambient sensors that cooperate to monitor a person's vital signs such as heart rate and blood pressure during daily activities. Each wearable sensor is attached on different parts of the body. The wearable sensors require a high sampling rate and time synchronization to provide ...
Park Sung Ha - - 2011
Loss of postural stability can increase the likelihood of slips and falls in workplaces. The present study intended to extend understanding of the effects of frequency and pressure level of sound on postural stability during standing. Eleven male subjects participated. Standing on a force platform, the subjects' center of pressures ...
Bombarda Gabriela - - 2011
Results from our laboratory have demonstrated that intracerebroventricular administration of sildenafil to conscious rats promoted a noticeable increase in both lumbar sympathetic activity and heart rate, with no change in the mean arterial pressure. The intracerebroventricular administration of sildenafil may have produced the hemodynamic effects by activating sympathetic preganglionic neurons ...
Olsson Kerstin - - 2011
Heart rate and plasma cortisol concentration are often used in evaluation of physiological reactions to stress and fear, but arterial blood pressure is rarely measured in farm animals. Goats are prey animals and can be expected to react strongly to a predator, especially when they have kids. We hypothesized that ...
Protheroe Clare Louise - - 2011
Syncope, or fainting, affects approximately 6.2% of the population, and is associated with significant comorbidity. Many syncopal events occur secondary to excessive venous pooling and capillary filtration in the lower limbs when upright. As such, a common approach to the management of syncope is the use of compression stockings. However, ...
Valera Beatriz - - 2011
Populations which diet is rich in seafood are highly exposed to contaminants such as mercury, which could affect cardiovascular risk factors To assess the associations between mercury and blood pressure (BP), resting heart rate (HR) and HR variability (HRV) among French Polynesians Data were collected among 180 adults (≥ 18 ...
Brown Alastair - - 2011
Depth zonation of fauna on continental margins is well documented. Whilst increasing hydrostatic pressure with depth has long been considered a factor contributing significantly to this pattern, discussion of the relative significance of decreasing temperature with depth has continued. This study investigates the physiological tolerances of fed and starved specimens ...
Rosado-Rivera Dwindally - - 2011
Fluctuations in 24-hour cardiovascular hemodynamics, specifically heart rate (HR) and blood pressure (BP), are thought to reflect autonomic nervous system (ANS) activity. Persons with spinal cord injury (SCI) represent a model of ANS dysfunction, which may affect 24-hour hemodynamics and predispose these individuals to increased cardiovascular disease risk. To determine ...
Choy Cheuk-Sing - - 2011
Increasing childhood obesity has become a major health threat. This cross-sectional study reports associations between schoolchildren's waist circumference (WC) and risk of elevated blood pressure. We measured height, weight, neck and waist circumference, and blood pressure in regular health examinations among children in grade 1 (ages 6-7 years) at six ...
Rasch Björn - - 2011
The sympatho-adrenergic system is highly involved in regulating sleep, wake and arousal states, and abnormalities in this system are regarded as a key factor in the development and progression of arterial hypertension. While hypertension is associated with a hyperadrenergic state during wakefulness, the effect of hypertension on plasma-catecholamine levels during ...
Rajabi-Jaghargh Ehsan - - 2011
Guidewire (GW) size and stenosis dimensions are the two major factors affecting the translesional pressure drop. Studying the combined effect of these parameters on the mean pressure drop (Δp) across the stenosis is of high practical importance. In this study, time averaged mass and momentum conservation equations are solved analytically ...
Hildrum Bjørn - - 2011
For decades, symptoms of anxiety and depression have been included among psychological factors associated with development of hypertension. Although this has been questioned in recent studies, most findings have been based on a single assessment of mental distress at baseline. We examined these associations using repeated assessments of anxiety, depression ...
De Feo Marisa - - 2011
In this study, we reviewed a 15-year experience with the treatment of a severe sequela of cardiac surgery: post-sternotomy mediastinitis. We compared the outcomes of conventional treatment with those of negative-pressure wound therapy, focusing on mortality rate, sternal reinfection, and length of hospital stay.We reviewed data on 157 consecutive patients ...
Sarkkinen Essi S - - 2011
High salt intake is linked to hypertension whereas a restriction of dietary salt lowers blood pressure (BP). Substituting potassium and/or magnesium salts for sodium chloride (NaCl) may enhance the feasibility of salt restriction and lower blood pressure beyond the sodium reduction alone. The aim of this study was to determine ...
Hinojosa-Laborde Carmen - - 2011
Heart rate variability (HRV) decreases during hemorrhage, and has been proposed as a new vital sign to assess cardiovascular stability in trauma patients. The purpose of this study was to determine if any of the HRV metrics could accurately distinguish between individuals with different tolerance to simulated hemorrhage. Specifically, we ...
Victor Suresh S Ward 68, 2nd Floor, St Mary's Hospital for Women and Children, Manchester, UK. - - 2011
Respiratory distress syndrome remains a significant problem among premature infants. Mechanical ventilation through an endotracheal tube remains the mainstay of respiratory support but may be associated with lung injury and the development of chronic lung disease of prematurity. Efforts are needed to reduce the duration of mechanical ventilation in favour ...
Jones Catherine L CL Department of Psychiatry, Clinical Imaging Sciences Centre, Brighton and Sussex Medical School, Falmer, United Kingdom. - - 2011
When deciding whether to bet in situations that involve potential monetary loss or gain (mixed gambles), a subjective sense of pressure can influence the evaluation of the expected utility associated with each choice option. Here, we explored how gambling decisions, their psychophysiological and neural counterparts are modulated by an induced ...
Olszewski Waldemar L WL Department of Surgical Research and Transplantology, Medical Research Center, Polish Academy of Sciences, Warsaw, Poland. - - 2011
Physiotherapy of edema in cases with obstructed main lymphatics of lower limbs requires knowledge of how high external pressures should be applied manually or set in compression devices in order to generate tissue pressures high enough to move tissue fluid to nonswollen regions and to measure its flow rate. We ...
Genc Sahika S Sensor Informatics and Technologies Laboratory, Software Sciences and Analytics, General Electric Global Research, Niskayuna, NY 12309, USA. - - 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 ...
Miura H H Institute of Development, Aging and Cancer, Tohoku University, Sendai 9808575, JPN. - - 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 ...
Olufsen Mette S MS Department of Mathematics, North Carolina State University, Raleigh, NC, USA. - - 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 ...
Logier R R INSERM CIC-IT 807, University Hospital of Lille, Institut Hippocrate, 2 avenue Oscar Lambret 59037 Lille Cedex, France. - - 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 ...
Mendez Guadalupe Dorantes GD Dipartimento di Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 23, 20133 Milan, - - 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 ...
Bruns Tim M TM Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA 15213, USA. - - 2011
Individuals with dysfunctional bladders may benefit from devices that track the bladder state. Recordings from pelvic and sacral nerve cuffs can detect bladder contractions, however they often have low signal quality and are susceptible to interference from non-bladder signals. Microelectrode recordings from sacral dorsal root ganglia (DRG) neurons may provide ...
Zhang Guanqun G Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 48824, USA. - - 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 ...
Imaizumi Kazuya K Tokyo Healthcare University, Tokyo, Japan. k-imaizumi@ - - 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 ...
Ferrario Manuela M Dipartimento di Bioingegneria, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy. - - 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), ...
Bogner Barbara B Department of Ophthalmology and Optometry, SALK/Paracelsus Medical University, Salzburg, - - 2011
To investigate the effects of arginine-vasopressin (AVP) on intraocular pressure (IOP), orbital venous pressure (OVP), and choroidal blood flow (ChorBF) regulation in anesthetized rabbits. Mean arterial pressure (MAP), IOP, and OVP were measured by direct cannulation of the central ear artery, the vitreous, and the orbital venous sinus, respectively. Laser ...
Kutluhan Ahmet - - 2011
The purpose of this study was to determine the effect of uncinectomy without sinusotomy and natural ostial dilatation on maxillary sinus ventilation in chronic rhinosinusitis. Twenty patients with chronic rhinosinusitis were included in this study. The patients were randomly divided into two groups. Group 1 consisted of patients with uncinectomy ...
Madsen Line Bille - - 2011
Abstract Aims. The purpose of the present study was to compare the costs of home blood pressure (BP) telemonitoring (HBPM) with the costs of conventional office BP monitoring. In a randomized controlled trial, 105 hypertensive patients performed HBPM and 118 patients received usual care with conventional office BP monitoring during ...
Palatini Paolo - - 2011
To study the effect of leisure-time physical activity on the progression of carotid intima-media thickness (IMT) in the early stage of hypertension. We studied 47 sedentary and 40 physically active young pre-hypertensive or stage 1 hypertensive subjects. IMT was assessed in the common carotid artery, carotid bulb and internal carotid ...
Moritz Stefan - - 2010
Diagnostic accuracy studies of neuromonitoring devices during carotid endarterectomy in awake patients are limited by the question of the transferability to anesthetized patients. This study was designed to compare the different neuromonitoring parameters in patients under regional and general anesthesia with stump pressure as the primary endpoint and the courses ...
Kato Akihiko - - 2010
Essential amino acid tryptophan (Trp) is mainly catabolized by indoleamine 2,3-dioxygenase, which leads to the formation of kynurenine (Kyn). In this study, we reexamined whether an increased indoleamine 2,3-dioxygenase activity, as estimated by the Kyn/Trp ratio (μM/mM), is associated with atherosclerotic parameters in hemodialysis (HD) patients. Serum Trp and Kyn ...
Lataro R M - - 2010
This study aimed to characterize the role played by baroreceptors and chemoreceptors in the hypertensive response to bilateral carotid occlusion (BCO) in conscious C57BL mice. On the day before the experiments the animals were implanted with pneumatic cuffs around their common carotid arteries and a femoral catheter for measurement of ...
Ojha Shreesh - - 2010
Present study investigated the effects of isoproterenol-induced oxidative stress on hemodynamic and ventricular functions in rats. Subcutaneous injections of isoproterenol (85 mg/kg for two consecutive days at 24 h interval) significantly decreased myocardial antioxidant enzymes; superoxide dismutase, catalase and glutathione peroxidase in heart. Isoproterenol-induced oxidative stress was also evidenced by significant depletion ...
Zhu Wen - - 2010
The relationship between HbA(1c), blood pressure, and carotid atherosclerosis in nondiabetic patients is not clear. HbA(1c) and blood pressure can affect carotid-artery atherosclerosis in nondiabetic patients. This retrospective cross-sectional study included 216 patients without diabetes mellitus. A positive carotid ultrasonographic result was defined as intima-media thickness of the common carotid ...
Currie Katharine D - - 2010
Measures of vascular health are known to be important predictors of cardiovascular disease in adulthood. The reliability of commonly used measures of vascular health has been demonstrated in school-aged children, adolescents, and adults; however, their reliability in preschool-aged children remains to be determined. Twenty 2- to 6-year-old children participated in ...
Fernandes T L - - 2010
We determined the sympathetic and parasympathetic control of heart rate (HR) and the sensitivity of the cardiopulmonary receptors after selective carotid and aortic denervation. We also investigated the participation of the autonomic nervous system in the Bezold-Jarish reflex after selective removal of aortic and carotid baroreceptors. Male Wistar rats (220-270 ...
Giustiniano Enrico - - 2010
BACKGROUND: Carotid endarterectomy is subject to a significant risk of intraoperative stroke. Anesthetic management of patients must provide optimal monitoring of cerebral blood perfusion to establish whether intraluminal carotid shunting is necessary. Cerebral oximetry (regional cerebral oxygen saturation, rSO2) measurement can ascertain whether brain perfusion is adequate. During carotid cross-clamping, ...
Taylor Jeremy G - - 2010
Hypertension is a leading cause of morbidity and mortality worldwide. Despite the development of new medications, an alarmingly high proportion of patients are not reaching their target blood pressure goals, so nonpharmacologic therapies have been attracting more interest. Chronic baroreceptor stimulation of the carotid sinus has been shown to reduce ...
Al-Nimer Marwan S - - 2010
OBJECTIVES: To assess subclinical atherosclerosis in subtypes of hypertension using lipid profile as a biomarker and B mode ultrasonography of the carotid arteries. METHODS: Ninety-six subjects (49 females and 47 males) aged 42-78 years were recruited from the vascular Doppler unit at Baghdad Teaching Hospital, Baghdad, Iraq from January to ...
Scheffers Ingrid J M - - 2010
Electrical activation of the carotid baroreceptor system is an attractive therapy for the treatment of resistant hypertension. In the past, several attempts were made to directly activate the baroreceptor system in humans, but the method had to be restricted to a few selected patients. Adverse effects, the need for better ...
Manwaring Mark L - - 2010
OBJECTIVE: This study compares internal carotid artery (ICA) mean stump pressures (SPs) with cerebral oximetry monitoring during carotid endarterectomy (CEA). METHODS: A total of 104 consecutive patients undergoing CEA under general anesthesia (GA) during a 10-month period were prospectively evaluated. Baseline and postcarotid clamp regional cerebral oxygen saturation (rSO(2)) and ...
Tan Can Ozan - - 2010
Though many consider the magnitude of respiratory sinus arrhythmia as an index of cardiac vagal control, its physiological origins remain unclear. One influential model postulates that the systolic pressure rise within a given beat stimulates the baroreflex arc to adjust the following heart period such that diastolic pressure is "stabilized" ...
Kendrick Jessica - - 2010
To examine the relationship between systolic blood pressure and progression of carotid intima-media thickness in patients with chronic kidney disease (CKD), we studied 3364 patients from a community-based cohort of elderly individuals of whom 724 had CKD defined as creatinine clearances of stage 3 or less. The contribution of systolic ...
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