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Results 451 - 500 of 2582
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Anjan Venkatesh Y - - 2012
B-type natriuretic peptide (BNP) is used widely to exclude heart failure (HF) in patients with dyspnea. However, most studies of BNP have focused on diagnosing HF with reduced ejection fraction (EF). The aim of this study was to test the hypothesis that a normal BNP level (≤100 pg/ml) is relatively ...
Wellman Tyler J - - 2012
Heterogeneous, small-airway diameters and alveolar derecruitment in poorly aerated regions of normal lungs could produce ventilation heterogeneity at those anatomic levels. We modeled the washout kinetics of (13)NN with positron emission tomography to examine how specific ventilation (sV) heterogeneity at different length scales is influenced by lung aeration. Three groups ...
Kara Necip - - 2012
PURPOSE:: To compare the biomechanical properties of the cornea between topographically normal relatives of patients with keratoconus and age-matched controls. METHODS:: Thirty healthy individuals (control group) and 30 topographically normal relatives of patients with keratoconus (study group) were enrolled in this prospective, cross-sectional comparative study. Topographical measurements including pachymetric values, ...
Honzikova N - - 2012
In this study we tested whether joint evaluation of the frequency (f(cs)) at which maxima of power in the cross-spectra between the variability in systolic blood pressure and inter-beat intervals in the range of 0.06-0.12 Hz occur together with the quantification of baroreflex sensitivity (BRS) may improve early detection of ...
Karan Suzanne B - - 2012
Techniques to quantify the effects of sedation on upper airway collapsibility have been used as research tools in the laboratory and operating room. However, they have not been used previously in the usual clinical practice environment of colonoscopy sedation. The propensity for upper airway collapsibility, quantified as the critical pharyngeal ...
Giannarelli Chiara - - 2012
OBJECTIVE: To evaluate local carotid stiffness (CS) and intima-medial thickness (C-IMT) in hypertensive patients with different cardiovascular risk profile, using a new user-friendly ultrasound-based system, previously validated vs. RF-based echotracking device. METHODS: We investigated a population with different cardiovascular risk: 45 healthy normotensives (NT), 90 non-diabetic hypertensives (HT), and 48 ...
Sarafidis Pantelis A - - 2012
Background/Aims: Data on the prevalence, treatment and control of hypertension in patients with advanced chronic kidney disease (CKD) are limited. This study aimed to examine the above factors in a cohort of predialysis patients. Methods: During a period of 4 months, we recorded information on blood pressure (BP), comorbidities, medications ...
Lynch A I - - 2012
Nearly one-third of adults in the United States have hypertension, which is associated with increased cardiovascular disease (CVD) morbidity and mortality. The goal of antihypertensive pharmacogenetic research is to enhance understanding of drug response based on the interaction of individual genetic architecture and antihypertensive therapy to improve blood pressure control ...
Frith J - - 2012
Introduction: Autonomic dysfunction is common in chronic fatigue syndrome (CFS). This study set out to derive an autonomic biomarker using a comprehensive assessment of heart rate and blood pressure variability. METHODS: Heart rate and non-invasive continuous blood pressure measurements (task force monitor) at rest and on standing were performed in ...
Beltran-Agullo Laura - - 2012
PURPOSE:: To investigate the effect of primary selective laser trabeculoplasty (SLT) on outflow facility and aqueous flow rate in patients with primary open-angle glaucoma or ocular hypertension. METHODS:: Eighteen eyes (9 with ocular hypertension and 9 with primary open-angle glaucoma) were included in this prospective noncontrolled study. Patients with intraocular ...
Guzman-Aranguez Ana - - 2012
The ability of diinosine polyphosphates, diinosine triphosphate (Ip(3)I), diinosine tetraphosphate (Ip(4)I) and diinosine pentaphosphate (Ip(5)I) to modify intraocular pressure in normotensive New Zealand white rabbits was tested. Ip(5)I produced increase in intraocular pressure, while Ip(3)I and Ip(4)I produced a decrease. Ip(4)I was the most effective reducing intraocular pressure inducing a ...
van der Horst Arjen - - 2012
Measurement of coronary pressure and absolute flow dynamics have shown great potential in discerning different types of coronary circulatory disease. In the present study, the feasibility of assessing pressure and flow dynamics with a combination of two thermal methods, developed in combination with a pressure-sensor-tipped guide wire, was evaluated in ...
Talajic Julia C - - 2012
PURPOSE:: To assess changes in Scheimpflug-based measurements of the anterior segment after pilocarpine administration and prophylactic laser peripheral iridotomy (LPI) in narrow anterior chamber angles (ACAs). METHODS:: Thirty-seven eyes in 37 patients with occludable angles were included in this prospective interventional case series. Primary angle-closure suspects (iridotrabecular contact in 3 ...
Floren Michael L - - 2012
We present a novel method to fabricate silk fibroin hydrogels using high pressure carbon dioxide (CO(2)) as a volatile acid without the need for chemical crosslinking agents or surfactants. The simple and efficient recovery of CO(2) post processing results in a remarkably clean production method offering tremendous benefit towards materials ...
Mohammadi Saber - - 2012
Some studies suggest that exposure to industrial solvents can affect blood pressure. The objective of this study was to investigate the effect of a mixture of organic solvents on blood pressure in women working in a pharmaceutical company in Iran. Four hundred and thirty-three women were included in the study. ...
Mutzbauer Elke Elisabeth - - 2012
BackgroundGastric inflation is a significant issue when ventilation of the unprotected airway is performed. The purpose of this study was to evaluate a prototype pressure relief valve with an acoustic expiration control mechanism connected to two different masks.Methods12 non-physician healthcare professionals (group 1) and 10 newly certified dentists (group 2) ...
Bousie Jaquelin A - - 2012
OBJECTIVES: To determine the effect of contouring of an in-shoe foot orthosis on plantar contact area and surface pressure, as well as perceived comfort and support at the foot-orthosis interface during stationary cycling. DESIGN: A randomised, repeated measures control study. METHODS: Twelve cyclists performed steady-state seated cycling at a cadence ...
Law Malcolm - - 2012
Abstract Dividing people into 'hypertensives' and 'normotensives' is commonplace but problematic. The relationship between blood pressure and cardiovascular disease is continuous. The Prospective Studies Collaboration analysis shows a continuous straight line dose-response relationship across the entire population down to blood pressure levels of 115 mmHg systolic and 75 mmHg diastolic, ...
Uthoff H - - 2012
Purpose: To prospectively evaluate the accuracy of noninvasive central venous pressure (CVP) assessment by compression ultrasound of a forearm vein (CUS), inferior vena cava (IVC-C) and internal jugular vein collapsibility (IJV-C) compared to invasive CVP measurement (invCVP) as the gold standard. Materials and Methods: CUS, IVC-C and IJV-C were performed ...
Miller Rosalind J - - 2012
Evidence for the benefits of green tea catechins on vascular function is inconsistent, with genotype potentially contributing to the heterogeneity in response. Here, the impact of the catechol-O-methyltransferase (COMT) genotype on vascular function and blood pressure (BP) after green tea extract ingestion are reported. Fifty subjects (n = 25 of ...
Steen S - - 2012
BACKGROUND: Circulatory instability is a serious problem after brain death in organ donors. The hypotension is often counteracted with infusion of large amounts of crystalloid solutions, which may impair lung function leading to rejection of the lungs as donor organs. The aim was to show that the circulation can be ...
Aubé-Maurice J - - 2012
Studies suggest that hypertension is more prevalent in the most deprived. Our objective was to examine the association between incident hypertension and deprivation in Quebec based on different modes of case identification, using two administrative databases. We identified new incident cases of hypertension in 2006/2007 in the population aged 20 ...
Ghaffari Masoud Selk - - 2012
The purpose of this study was to establish normal physiologic reference values for intraocular pressure (IOP) and Schirmer tear test (STT) results in clinically normal ostriches (Struthio camelus). Twenty ostriches of both sexes, 10 juveniles (1.5-2 yr of age) and 10 adults, were included in this study. Complete ophthalmic examination ...
Boilson B A - - 2012
Chronic thromboembolic pulmonary hypertension (CTEPH) results from chronic thrombotic occlusion of the pulmonary arterial circulation and may be potentially cured by pulmonary thromboendarterectomy. Echocardiography is the most practical modality for the assessment of right ventricular function and right heart pressures before and after surgery. However, there is scant data on ...
Plange Niklas - - 2012
Purpose: To investigate the relationship between increased fluorescein leakage of the optic nerve head and intraocular pressure (IOP), visual field defect, vertical cup-to-disc ratio, disc size and systemic blood pressure in primary open-angle glaucoma (POAG). Methods: Twenty-seven patients with POAG (aged 63 ± 11 years) and 15 control subjects (aged 58 ± 9 years, ...
Sessler Daniel I - - 2012
Low mean arterial pressure (MAP) and deep hypnosis have been associated with complications and mortality. The normal response to high minimum alveolar concentration (MAC) fraction of anesthetics is hypotension and low Bispectral Index (BIS) scores. Low MAP and/or BIS at lower MAC fractions may represent anesthetic sensitivity. The authors sought ...
Wignall Jamie R - - 2012
Objective-To evaluate effects of the arytenoid lateralization technique and suture tension on airway pressure in the canine larynx. Sample-7 canine cadaver larynges. Procedures-Negative pressure was elicited aboral to the larynx. Airway pressure was measured at airflows of 15 to 120 L/min before and after thyroarytenoid lateralization (TAL), cricoarytenoid lateralization (CAL), ...
Neblett Enrique W EW - - 2012
Objective To examine the protective effects of racial identity and Africentric worldview on the association between racial discrimination and blood pressure (BP). Methods Two hundred ten African American young adults completed questionnaires assessing demographic characteristics, prior racial discrimination experiences, racial identity, and Africentric worldview. Resting BP was assessed before and ...
Li G - - 2012
Purpose: We developed a rat model of acute hypertension by occluding the descending aorta and used cerebral blood flow (CBF) MRI to evaluate cerebral autoregulation (CA) under normocapnia and hypercanpia. This method avoids potential pharmaceutical complications and can be repeatedly applied in the scanner. The long term goal is to ...
Schipke Jochen D - - 2012
Dear Editor, We agree with Dr Walker's concerns about risks associated with breath-hold diving, voiced after Professor Schagatay's first review in 2009 in this journal.1,2 We thank Professor Schagatay for her very thorough reviews, but only agree in part with her view that reporting increases safety, as breath-hold deep diving ...
Chen Guo - - 2012
To evaluate the validity of cardiac output (CO) measurements obtained using the Nexfin device in comparison to those obtained with the esophageal Doppler in steady-state conditions and after phenylephrine administration. Prospective observational study. Operating room of a North American academic medical center. 25 ASA physical status 1, 2, and 3 ...
Kabalin Milena - - 2012
The aim of this research was to investigate the prevalence of obesity and high blood pressure and to prove which of three anthropometric indicators of obesity - waist circumference, body mass index (BMI) waist-to-hip ratio - is better predictor for the development of hypertension in women population of the island ...
Thiering Elisabeth - - 2012
OBJECTIVES:: Rapid growth velocity in early life may be a risk factor for obesity, elevated blood pressure, and adverse metabolic markers in childhood, but results are not consistent. We analysed the association between peak growth velocity during the first 2 years of life and blood pressure, fasting glucose and insulin ...
Yang Yan-Ling - - 2012
Aims: Stroke is a major cause of disability and death worldwide. Hypertension is one of the most important risk factors for stroke. The objective of this work was to study the synergic effects of levamlodipine and bisoprolol on blood pressure reduction and organ protection in spontaneously hypertensive rats (SHR). Methods: ...
Fischer Mary E - - 2012
BACKGROUND: Standard clinical advice for the prevention and treatment of hypertension includes limitation of salt intake. Previous studies of the association between perception of salt taste and hypertension prevalence have not reported consistent results and have usually been conducted in small study populations. PURPOSE: To determine the cross-sectional relationship between ...
Yusa Hitoshi - - 2012
High-pressure structural phase transitions in NaNiF(3) and NaCoF(3) were investigated by conducting in situ synchrotron powder X-ray diffraction experiments using a diamond anvil cell. The perovskite phases (GdFeO(3) type) started to transform into postperovskite phases (CaIrO(3) type) at about 11-14 GPa, even at room temperature. The transition pressure is much ...
Oura Trisha - - 2012
To determine if low tidal volume (V(T) ) ventilation is associated with the development of respiratory acidosis and changes in lung function in healthy dogs. Randomized prospective experimental cross-over study. Pulmonary function laboratory at a university teaching hospital. Five healthy Beagle dogs. Dogs were anesthetized and randomly mechanically ventilated with ...
Brorson Håkan - - 2012
Abstract The use of compression garments in treating lymphedema following treatment of genital (penis, testes, uterus, cervical) and breast cancer treatment is a well-established practice. Although compression garments are classified in compression classes, little is known about the actual subgarment pressure exerted along the extremity. The aims of this study ...
Molloy Bonnie - - 2012
There is increasing interest in monitoring intraocular pressure (IOP) during surgery in steep Trendelenburg position because of reported incidents of postoperative visual loss (POVL). A review of 17 patients with POVLs showed findings of eyelid edema, chemosis, and ecchymosis. The aim of this study was to link IOP tonometry measurement ...
Lee Juyoung - - 2012
OBJECTIVE: To determine whether neurally adjusted ventilatory assist (NAVA), a new method of mechanical ventilation that delivers pressure assistance that is proportional to the electrical activity of the diaphragm (EAdi), could lower the inspiratory pressure and respiratory muscle load in preterm infants supported with ventilators. STUDY DESIGN: Twenty-six mechanically ventilated ...
Chang Sung-A - - 2012
Aortic stenosis (AS) is increasingly diagnosed in current aging society. Echocardiography is the most important tool in the assessment of AS and its severity. However, load-dependency of Doppler measurement could affect the accuracy of AS severity assessment. We tried to evaluate the impact of afterload on the assessment of AS ...
Moon Bo-Eun - - 2012
The cuff of the laryngeal mask airway (LMA) is preferred to be partially inflated before insertion in pediatric cases. However, it is not known how much inflation is appropriate. In addition, intra-cuff pressure is not routinely monitored in many institutions despite the fact that a neglected high cuff pressure could ...
Lindblad Ulf - - 2012
To describe the prevalence, awareness, and control of hypertension in a Swedish population during the early 2000s to address implications for care and prevention. A cross-sectional population survey. Primary health care in Skaraborg, a rural part of western Sweden. Participants (n =2816) in a population survey of a random sample ...
Ishikawa Joji - - 2012
We evaluated the agreement between office blood pressure (OBP) measured by a mercury sphygmomanometer (Sphyg) and an automatic (Auto) device without any observers, and compared Auto and Sphyg OBP with ambulatory blood pressure (ABP) and home blood pressure (HBP). OBP was measured in 75 hypertensive patients at two sites using ...
Adeoye A M - - 2012
Some studies have suggested that diastolic dysfunction precedes the clinical manifestation of hypertension. Whether changes in cardiac structure and function predate the clinical manifestation of hypertension later in life is now being investigated. The aim of this study was to assess the differences in cardiac structure and function between the ...
Punzi Henry A - - 2012
A predefined exploratory analysis of a prospective, randomized, double-blind, forced-titration study of olmesartan medoxomil (OM) versus losartan potassium (LOS) in subjects with hypertension not previously or previously treated with antihypertensive medication is reported. The study included a 3-4-week placebo run-in and an 8-week active treatment period: OM (weeks 1-4, OM ...
Kurita Tadayoshi - - 2012
The bispectral index for measurement of anesthetic depth may be modified by extreme hypotension during hemorrhagic shock. In this study, the influence of progressive hemorrhage and subsequent cardiopulmonary resuscitation on the bispectral index was investigated under controlled anesthetic depth. Fifteen swine were anesthetized through inhalation of isoflurane under bispectral index ...
Breaux-Shropshire Tonya L - - 2012
Despite the availability of effective medications, hypertension remains inadequately managed in the United States. It has been established that medication adherence is a major strategy for controlling blood pressure. Combined interventions to promote adherence are promising, but further research is needed to understand which behaviors to target. The frequency of ...
Zang Xiao-Ying - - 2012
Aims and objectives.  To explore which sociodemographic and clinical factors could interfere in the parameters of ambulatory blood pressure monitoring and determine the affecting factors of Ambulatory Arterial Stiffness Index. Background.  Although the clinical relevance of ambulatory blood pressure monitoring and Ambulatory Arterial Stiffness Index have been studied, the explanation ...
Levy Phillip - - 2012
We examine the point prevalence of subclinical hypertensive heart disease in a cohort of urban emergency department (ED) patients with elevated blood pressure. A convenience sample of hypertensive (blood pressure ≥ 140/90 mm Hg on 2 measurements) patients aged 35 years or older with no history of cardiac or renal ...
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