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Larsen Britta A - - 2012
BackgroundThe putative health benefits of forgiveness may include long-term buffering against cardiovascular reactivity associated with rumination. Although studies show short-term benefits of adopting a forgiving perspective, it is uncertain whether this perspective protects against repeated future rumination on offenses, which may be necessary for long-term health benefits. Also unclear is ...
Gupta Hari Om - - 2012
Elevated blood pressure (BP) is associated with increased cardiovascular risks manifested by ischemic heart disease and stroke. Studies of cardiothoracic surgeons and neurosurgeons suggest surgery induces a hemodynamic stress malresponse. However, it is unclear whether these occur in orthopaedic surgeons. We measured the BP of surgeons during hallux valgus surgery, ...
Camen Giovanni - - 2012
Preliminary evidence supports an association between OSA and cardiac dysrhythmias. Negative intrathoracic pressure, as occurring during OSA, may provoke cardiac dysrhythmias. Thus, we aimed to study the acute effects of simulated apnea and hypopnea on arrhythmic potential and measures of cardiac repolarization [QT(C) and T (peak) to T (end) intervals ...
Santamarta D - - 2012
OBJECTIVE: In the present study an attempt was made to quantify and characterise the changes in the intracranial pressure (ICP) waveform over the wide pressure range covered during infusion studies by means of the central tendency measure (CTM). CTM is a non-linear approach using continuous chaotic modelling that summarises the ...
Köksal Neşet - - 2012
BACKGROUND We aimed to test whether hemoperitoneum has adverse effects on colonic anastomosis healing by increasing fibrinolytic activity. METHODS After colonic intersection and anastomosis, 20 Wistar Albino rats received intraabdominal injections of either 25 mg/kg blood (10, Group 1) or physiologic saline (10, Group 2). Anastomotic bursting pressures were measured ...
Alvear Rosa M Bermúdez de - - 2012
Objectives. To determine heart rate influence on voice fundamental frequency under stress conditions. Methods. In 14 healthy volunteers, heart rate and blood pressure variables were analyzed during three classical autonomic tasks. Sustained voice samples were obtained to analyze F0. Results. Cold pressure test increased mean blood pressure, without effect on ...
Dori Guy - - 2012
The absolute value of ejection fraction (EF) in patients with heart failure and preserved ejection fraction (HFpEF) is often observed to be greater than that in healthy, age- or risk-factor matched controls. Assuming this observation is true, we sought for a physiological explanation. It is hypothesized that an increased EF ...
Budnar Vijaya M - - 2012
Background: Poor proximal femoral pressures during a cemented primary hip replacement may compromise proximal fixation and cause early aseptic loosening. Occlusion of the calcar, during stem insertion, achieves a uniform and sustained rise in the proximal intra-medullary pressure, which should enhance cement penetration into bone and improve long-term survival of ...
Cernaro Valeria - - 2012
Background/Aims: To evaluate the balance between arginine-vasopressin (AVP) and apelin during hemodialysis and its role in hypotension onset and in the inflammation status. Methods: We enrolled 50 patients chronically treated with hemodialysis. We assessed plasmatic osmolality, AVP, apelin, mean blood pressure (BP), high-sensitivity C-reactive protein (hsCRP) and β(2)-microglobulin. Results: Apelin ...
Pirbodaghi Tohid - - 2012
OBJECTIVES: Rotary blood pumps (RBPs) running at a constant speed are routinely used for the mechanical support of the heart in various clinical applications, from short-term use in heart-lung machines to long-term support of a failing heart. Their operating range is delineated by suction and regurgitation events, leaving limited control ...
Cunningham J Thomas - - 2012
One of the main clinical features of obstructive sleep apnea is sustained hypertension and elevated sympathetic activity during waking hours. Chronic intermittent hypoxia (CIH), animal model of the hypoxemia associated with obstructive sleep apnea, produces a similar sustained increase in blood pressure. This study determined the role of ΔFosB in ...
Proietti Riccardo - - 2012
Introduction: Closed-loop stimulation (CLS) is a form of rate-adaptive pacing capable of providing an effective pacing rate profile not only during physical exercise but also during mental stress. To test its effectiveness, CLS and accelerometer sensor (AS) rate response were compared intraindividually during a mental stress test (MST). Methods: Thirty-six ...
Weisskopf Markus - - 2012
OBJECTIVE: Intravertebral pressure (IP) is considered a possible factor influencing cement leakage in vertebroplasty (VP). Reports of measuring IP during the injection of the cement reveal rather low values in the periphery of the vertebral body but fail to determine the situation in the center. Hypothesizing there is a significant ...
Meyer S - - 2012
Parameters of intrarectal pressure (surface area under pressure curve and peak pressure) recorded with a microsystem device during the second phase of labor showed no significant correlations with baby's weight or mode of delivery. Was to assess the biomechanical pressures delivered against pelvic floor structures during the second phase of ...
Zhu Jian Hua - - 2012
This study reconstructed a three dimensional fluid/structure interaction (FSI) model to investigate the compliance of human soft palate during calm respiration. Magnetic resonance imaging scans of a healthy male subject were obtained for model reconstruction of the upper airway and the soft palate. The fluid domain consists of nasal cavity, ...
Furuya J - - 2012
Summary  The tongue assumes an important role in bolus formation and transportation to the oropharynx and in retaining pharyngeal pressure during mastication and swallowing. Although the state of tongue-palate contact during swallowing is thought to change with bolus type, the details of these changes have yet to be clarified under ...
Vos Roemer J - - 2012
Vacuum-assisted closure is commonly used to treat post-sternotomy mediastinitis. Several studies show improved outcome using vacuum-assisted therapy; however, risks using negative pressure should not be underestimated. We describe two cases of acute mediastinal bleeding during vacuum treatment for post-sternotomy mediastinitis and discuss preventative measurements.
Yalcin Ozlem - - 2012
Acclimatization to hypoxia requires time to complete the adaptation mechanisms that influence oxygen (O(2)) transport and O(2) utilization. Although decreasing hemoglobin (Hb) O(2) affinity would favor the release of O(2) to the tissues, increasing Hb O(2) affinity would augment arterial O(2) saturation during hypoxia. This study was designed to test ...
Kuznetsova Tatiana - - 2012
To understand better the mechanism of left ventricular (LV) remodeling related to hypertension, it is important to evaluate LV function in relation to the changes in loading conditions. The aim of this study was to investigate changes in conventional ventricular-arterial coupling indexes, LV strain, and a new index reflecting regional ...
Loforte Antonio - - 2012
Abstract  The diagnosis of a patent foramen ovale (PFO) is a dynamic process and it is based on the detection of blood shunting at the atrial level. Only under abnormal physiologic conditions, such as with a left ventricular assist device (LVAD), when right atrial pressure (RAP) exceeds left atrial pressure ...
Rich David Q DQ Department of Community and Preventive Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York, - - 2012
Air pollution is a risk factor for cardiovascular diseases (CVD), but the underlying biological mechanisms are not well understood. To determine whether markers related to CVD pathophysiological pathways (biomarkers for systemic inflammation and thrombosis, heart rate, and blood pressure) are sensitive to changes in air pollution. Using a quasi-experimental opportunity ...
Grasselli Giacomo - - 2012
PURPOSE: During neurally adjusted ventilatory assist (NAVA), it is difficult to quantify the relative contribution of the patient versus the ventilator to the inspiratory tidal volume (Vt(insp)). To solve this problem, we developed an index, the "patient-ventilator breath contribution" (PVBC), using the inspiratory deflection of the diaphragmatic electrical activity (∆EAdi) ...
Purushothaman B K - - 2012
A sub-atmospheric pressure nickel hydrogen (Ni-H(2)) battery with metal hydride for hydrogen storage is developed for implantable neuroprosthetic devices. Pressure variations during charge and discharge of the cell are analyzed at different states of charge and are found to follow the desorption curve of the pressure composition isotherm (PCI) of ...
Purushothaman B K - - 2012
A low pressure nickel-hydrogen battery using either a metal hydride or gaseous hydrogen for H(2) storage has been developed for use in implantable neuroprosthetic devices. In this paper, pressure variations inside the cell for the gaseous hydrogen version are analyzed and correlated with oxygen evolution side reaction at the end ...
de Zambotti Massimiliano - - 2012
To our knowledge, no previous study has provided reliable data supporting a different modulation of the Neurovegetative system in essential hypotension. Our purpose was to provide, in essential hypotensive women compared to normotensives, evidence of a distinct sympathetic and parasympathetic cardiac control. Cardiovascular and autonomic indexes derived by impedance cardiography ...
Bordessoule Alice - - 2012
Background:Neurally Adjusted Ventilatory Assist (NAVA) is a mode of ventilation controlled by the electrical activity of the diaphragm (Edi). The aim was to evaluate patient-ventilator interaction in infants during NAVA compared to conventional ventilation.Methods:Infants were successively ventilated with NAVA, pressure control (PCV) and pressure support (PSV). Edi and ventilator pressure ...
Fujii Naoto - - 2012
The arterial blood pressure and ventilatory responses to severe passive heating at rest varies greatly among individuals. We tested the hypothesis that the increase in ventilation seen during severe passive heating of resting humans is associated with a decrease in arterial blood pressure. Passive heating was performed on 18 healthy ...
Sweet Michael A - - 2012
BACKGROUND: A major risk factor for the development of bloodstream infection is the presence of a central venous catheter (CVC), especially in immunocompromised patients. CVC hub contamination is a risk factor for central line-associated bloodstream infection (CLABSI). METHODS: This observational before-after trial in a tertiary care hospital's oncology unit included ...
Kim Seung Hoon - - 2012
Purpose: To compare the infusion pressure shown by a vitrectomy device with the actual intraocular pressure (IOP) observed during pars plana vitrectomy. Furthermore, we evaluated the effects of variable parameters on the actual IOP during vitrectomy surgery. Materials and methods: Porcine eyes were obtained within 24 h of slaughter. Actual ...
Kasner Mario - - 2012
RATIONALE: Severe increase in right ventricular pressure can compromise left-ventricular function due to impaired interventricular interaction and aggravate the symptoms. OBJECTIVE: To elucidate how already mild/moderate idiopathic pulmonary arterial hypertension (IPAH) contributes to left-ventricular dysfunction due to impaired interventricular interaction. METHODS: Invasive pressure-volume (PV) loop analysis obtained by conductance catheterization ...
Ohta Yuko - - 2012
Blood pressure (BP) control in hypertensives has improved; however, it still remains to be insufficient. We have investigated the trend in BP control status of the hypertensive patients followed for 10 years in hypertension clinic. Subjects included 133 patients who have been followed from the first visit during 1998-2000 to ...
Poullis M - - 2012
No markers of quality of perfusion pressure and oxygen delivery during cardiopulmonary bypass (CPB), to complement rewarming rate, maximum temperature on rewarming, lowest haematocrit, and blood glucose, exist. Using the electronic acquisition of blood pressure on bypass (JOCAP system), the percentage of time perfusion pressure was below 30, 40, 50, ...
Panagiotopoulou Olga - - 2012
Foot pressure distributions during locomotion have causal links with the anatomical and structural configurations of the foot tissues and the mechanics of locomotion. Elephant feet have five toes bound in a flexible pad of fibrous tissue (digital cushion). Does this specialized foot design control peak foot pressures in such giant ...
Allegretti Ana Luiza - - 2012
There is a high incidence of pressure ulcers (PrUs) during long hours of surgery. Interface pressure and temperature are considered risk factors for PrU development. The objective of this study was to determine a methodology to measure interface pressure and temperature during long hours of surgery consistently. Five patients undergoing ...
Carll Alex P AP U.S. Environmental Protection Agency, Environmental Public Health Division, PO B143-01, Research Triangle Park, NC 27711, - - 2012
Epidemiological studies strongly link short-term exposures to vehicular traffic and particulate matter (PM) air pollution with adverse cardiovascular (CV) events, especially in those with preexisting CV disease. Diesel engine exhaust is a key contributor to urban ambient PM and gaseous pollutants. To determine the role of gaseous and particulate components ...
Rao Smita - - 2012
Regional plantar pressures during stair walking may be injurious in at risk populations. However, limited data are available examining the reliability of plantar pressure data collected during stair walking. The aims of this study were three fold; to assess the reliability of the plantar pressure data recorded during stair walking, ...
Hautamäki Hanna - - 2012
To compare the responses of heart rate and blood pressure to various autonomic tests in women with and without pre-treatment hot flushes during estradiol and estradiol+medroxyprogesterone acetate (MPA) use. Hundred and fifty recently postmenopausal women (72 with and 78 without hot flushes) were randomized to receive transdermal estradiol (1mg/day), oral ...
Vimláti L - - 2012
BACKGROUND: We investigated the haemodynamic stability of a novel porcine model of lung collapse induced by negative pressure application (NPA). A secondary aim was to study whether pulmonary shunt correlates with cardiac output (CO). METHODS: In 12 anaesthetized and relaxed supine piglets, lung collapse was induced by NPA (-50 kPa). Six ...
Vijaya Gopalan - - 2012
OBJECTIVE: To investigate changes in the oxygenated and deoxygenated haemoglobin (Hb) of the bladder wall during voluntary and involuntary detrusor contractions. STUDY DESIGN: Women with lower urinary tract symptoms were recruited from a urodynamics clinic. Near infra-red spectroscopy, a non-invasive optical technique which monitors changes in tissue oxygenation, was used ...
Donadio V - - 2012
Mental stress often begins with a sudden sensory (or internal) stimulus causing a brief arousal reaction, and is followed by a more long lasting stress phase. Both arousal and stress regularly induce blood pressure (BP) increases whereas effects on muscle sympathetic nerve activity (MSNA) are variable. Here we have compared ...
Dubose Joseph J - - 2012
INTRODUCTION: The purpose of this study was to analyze the accuracy of capillary blood glucose (CBG) against laboratory blood glucose (LBG) in critically ill trauma patients during the shock state. METHODS: All critically ill trauma patients admitted to the Surgical Intensive Care Unit at the Los Angeles County + University ...
Sanders Natalie A - - 2012
Effects of Rhythm Control on Blood Pressure. Introduction: The long-term effects of atrial fibrillation (AF) on blood pressure (BP) in patients with hypertension (HTN) remain unclear. We hypothesized that restoration of normal sinus rhythm (NSR) results in a decrease in BP despite the expected increase in cardiac output. Methods and ...
LaMarca Babbette - - 2012
Preeclampsia (PE), new-onset hypertension with proteinuria during pregnancy, is associated with increased reactive oxygen species, the vasoactive peptide endothelin-1 (ET-1), T and B lymphocytes, soluble antiangiogenic factors sFlt-1 and sEndoglin (sFlt-1 and sEng), and agonistic autoantibodies to the angiotensin II type I receptor (AT1-AA). One important area of investigation for ...
de la Oliva Pedro - - 2012
To determine if neurally adjusted ventilatory assist (NAVA) improves asynchrony, ventilatory drive, breath-to-breath variability and COMFORT score when compared to pressure support (PS). This is a non-randomized short-term cross-over trial in which 12 pediatric patients with asynchrony (auto-triggering, double triggering or non-triggered breaths) were enrolled. Four sequential 10-min periods of ...
Gosmanov Aidar R - - 2012
Hyperglycemia and elevated free fatty acids (FFA) are implicated in the development of endothelial dysfunction. Infusion of soy-bean oil-based lipid emulsion (Intralipid®) increases FFA levels and results in elevation of blood pressure (BP) and endothelial dysfunction in obese healthy subjects. The effects of combined hyperglycemia and high FFA on BP, ...
Shinojima Ari - - 2012
To reveal subtle morphological changes in the eye during simulated microgravity for spaceflights, we measured subfoveal choroidal thickness and foveal retinal thickness during 10 degrees head-down tilt (HDT). We hypothesized that elevated ophthalmic vein pressure during simulated microgravity increases subfoveal choroidal thickness via enlargement of the choroidal vasculature and greater ...
Martínez-García Paola - - 2012
Objective: Our aim was to evaluate the effect of the baroreflex mechanism upon peripheral blood volume during ympathetic stimulation by orthostatism. Methods: Nineteen clinically healthy volunteers were included (12 men), 28.4 ± 6.2 years old. Blood pressure was monitored with a Finometer and blood volume with a photoplethysmograph during supine ...
Sleutjens Janneke - - 2012
Objective-To evaluate the effect of various head and neck positions on intrathoracic pressure and arterial oxygenation during exercise in horses. Animals-7 healthy Dutch Warmblood riding horses. Procedures-The horses were evaluated with the head and neck in the following predefined positions: position 1, free and unrestrained; position 2, neck raised with ...
García de Hombre Alina M - - 2012
Negative pressure pulmonary oedema (NPPO) is an anaesthetic complication due to acute obstruction of the upper airway, whose main cause is laryngospasm. The pathophysiology involves a strong negative intrapleural pressure during inspiration against a closed glottis, which triggers excessive pressure in the pulmonary microvasculature. Although its diagnosis can be difficult, ...
Rozé H - - 2012
It is no longer safe to use large tidal volumes (V(T)) (>8 ml kg(-1)) for one-lung ventilation (OLV), and limiting plateau pressure should be a major objective. Due to the specificity of OLV, the use of positive end-expiratory pressure (PEEP) remains controversial. This study determined whether at the same low ...
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