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Agarwal Saurabh S Department of ENT and Head and Neck Surgery, Grant Medical College, J.J. Hospital, Room No. 712, Byculla, Mumbai, 400 008 - - 2013
To determine the likely association between hypertension and hearing loss. 150 cases and 124 controls, both genders, aged 45-64, included in the research after sample estimation. Hypertension was verified through blood pressure readings and was classified as grade 1, grade 2 and grade 3 hypertension or no hypertension according to ...
Maxwell Adam D AD Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA. - - 2013
In this study, the negative pressure values at which inertial cavitation consistently occurs in response to a single, two-cycle, focused ultrasound pulse were measured in several media relevant to cavitation-based ultrasound therapy. The pulse was focused into a chamber containing one of the media, which included liquids, tissue-mimicking materials, and ...
Sun Xiao-Ming XM Department of Communication Sciences and Disorders, Wichita State University, Wichita, KS 67260–0075, USA. - - 2013
To test the assumptions concerning the compensation of middle ear pressure (MEP) in using peak Y(tm) and the tympanogram asymmetry phenomenon, and to address the variability and reliability of 226 Hz tympanometry under negative MEP. (1) Repeated measures in normal ears with experimentally-induced negative MEP; (2) Retrospective analysis of clinical ...
Yamada Shinichiro - - 2013
A 51-year-old woman was admitted to our hospital because of the right ear fullness and orthostatic headache. Based on the findings of low cerebrospinal fluid (CSF) pressure and detected images of CSF leakage by MRI myelography and radionuclide cisternography, she was diagnosed as having spontaneous intracranial hypotension (SIH). Audiograms in ...
Apan A - - 2013
The aim of this study was to investigate the effects of N2O-O2 mixture (Inspired O2 30%) on middle ear pressure (MEP) in children compared with the effects of an air-oxygen mixture (Inspired O2 50%). The study included thirty child patients who underwent general anaesthesia for different reasons, with the exception ...
Wilson Maria - - 2013
Toothed whales and bats have independently evolved biosonar systems to navigate and locate and catch prey. Such active sensing allows them to operate in darkness, but with the potential cost of warning prey by the emission of intense ultrasonic signals. At least six orders of nocturnal insects have independently evolved ...
Kimitsuki Takashi T Department of Otolaryngology, Kyushu Central Hospital, Shiobaru, Minami-ku, Fukuoka, Japan, - - 2013
An increase in hydrostatic pressure in the endolymphatic system causes hydrops-related inner ear diseases such as Meniere's disease or low tone sensorineural hearing loss. In the present study, we investigated the effects of pressure exerted on potassium currents in acutely isolated inner hair cells of the guinea-pig cochlea using whole-cell ...
Degerli Semih S Anaesthesiology Reanimation Clinic, Kecioren Training and Research Hospital Ankara, - - 2013
The procedure of laryngoscopic orotracheal intubation (LOTI) has many impacts on several parts of the body. But its effect on middle ear pressure (MEP) is not known well. The purpose of this study is to evaluate the MEP changes subsequent to insertion of endotracheal tube with laryngoscope. 44 patients were ...
Luan Ying - - 2012
A comparison between phospholipid-coated microbubbles with and without liposomes attached to the microbubble surface was performed using the ultra-high-speed imaging camera (Brandaris 128). We investigated 73 liposome-loaded microbubbles (loaded microbubbles) and 41 microbubbles without liposome loading (unloaded microbubbles) with a diameter ranging from 3-10 μm at frequencies ranging from 0.6-3.8 ...
Stieger Christof C Department of Otology and Laryngology, Harvard Medical School, Eaton Peabody Laboratory, Massachusetts Eye and Ear Infirmary, 243 Charles Street, Boston, MA 02114, - - 2013
The cochlea is normally driven with "forward" stimulation, in which sound is introduced to the ear canal. Alternatively, the cochlea can be stimulated at the round window (RW) using an actuator. During RW "reverse" stimulation, the acoustic flow starting at the RW does not necessarily take the same path as ...
Shen Fanyi - - 2012
There are different opinions of the dynamics of an air bubble entering a xylem conduit. In this paper, we present a thorough mechanical analysis and conclude that there are three types of cavitation caused by air seeding. After an air seed enters a conduit at high xylem pressure , along ...
Qian Wei - - 2012
ABSTRACTObjective:A novel method was employed to control the sternocleidomastoid muscle contraction level during vestibular evoked myogenic potential (VEMP) measurement.Study Design:A prospective study to measure the normal VEMP response.Settings:A pressure feedback device composed of a firm rubber bulb and a pressure gauge was employed to monitor the muscular contraction level during ...
LaRae Recker Karrie K Starkey Hearing Technologies, Eden Prairie, MN, USA. - - 2012
Sound pressure-based real ear measurements are considered best practice for ensuring audibility among individuals fitting hearing aids. The accuracy of current methods is generally considered clinically acceptable for frequencies up to about 4 kHz. Recent interest in the potential benefits of higher frequencies has brought about a need for an ...
Park Jonas J-H - - 2012
The influence of Eustachian tube (ET) dysfunction on the inner ear fluid pressure and thus on the inner ear function in Meniere's disease has been discussed controversially. So far, most of the studies examining ET function in inner ear disorders indirectly analyzed ET function by tympanometric methods. The present study ...
Sturtevant Blake T - - 2012
Acoustic imaging systems based on the parametric array concept utilize a nonlinear medium for mixing high frequency sound into a beam of low frequency collimated sound. Fluorocarbon fluids are very appealing as nonlinear mixing media with values of the nonlinearity parameter, B/A, typically greater than 10 at ambient temperature and ...
Stanzial Domenico - - 2012
Wide band p-v tympanometry can be defined as the measurement of the acoustic immittance of the ear, possibly in normal air pressure condition of the ear canal, and in the full audio frequency range. The most important innovation pioneered by the p-v tympanometry regards the introduction of a different principle ...
Jennings Amy - - 2012
BACKGROUND: Although a high intake of some flavonoid subclasses may reduce cardiovascular disease mortality, data regarding the in vivo mechanisms of action are limited. OBJECTIVE: We examined associations between habitual flavonoid intakes and direct measures of arterial stiffness, central blood pressure, and atherosclerosis. DESIGN: In a cross-sectional study of 1898 ...
Jones Erika S W - - 2012
The epithelial sodium channel (ENaC) may be a common underlying pathway for the development of primary hypertension. In South Africa, the R563Q variant of the ENaC is associated with low-renin-low-aldosterone hypertension and preeclampsia in black Africans and mixed-ancestry peoples. The purpose of this study was to investigate the prevalence of ...
Tsai Dai-Hua - - 2012
Short-term exposure to ambient particulate matter with aerodynamic diameters <10 μm were found to be positively associated with blood pressure. Yet, little information exists regarding the association between particles and circadian rhythm of blood pressure. Hence, we analyzed the association of exposure to particulate matter with aerodynamic diameters <10 μm ...
Loniewska Beata - - 2012
Objective. The 1936G AKAP10 allele is associated with increased adult basal heart rate (HR) and decreased variability, markers of low cholinergic/vagus sensitivity associated with hypertension. Blood pressure (BP) values in newborns are important measurable markers of cardiovascular risk later in life. The question was whether decreased vagal function-related 1936A > ...
Gemignani Tiago - - 2012
BackgroundChanging from a supine to an orthostatic posture is associated with substantial increments in leg blood pressure (BP) levels, which could ultimately influence the hemodynamic burden imposed on the heart. This study investigated the relationship between brachial and leg BP measurements and the left cardiac chamber's structure and assessed the ...
Kong Hong - - 2012
C-reactive protein (CRP), an acute phase reactant and marker of inflammation, has been shown to be associated with CRP genetic variants and incident hypertension, but it is unclear whether this link is causal. We therefore conducted a prospective, nested case-control study to examine the relationship between single-nucleotide polymorphisms (SNPs) within ...
Shimbo Daichi - - 2012
Accumulating evidence suggests that increased visit-to-visit variability (VVV) of blood pressure is associated with stroke. No study has examined the association between VVV of blood pressure and stroke in postmenopausal women, and scarce data exist as to whether this relation is independent of the temporal trend of blood pressure. We ...
Haussen Diogo C - - 2012
Several variables are associated with poor outcome and mortality after intracerebral hemorrhage (ICH).(1) Among modifiable factors, hematoma expansion may have a predominant role, and has been the target of recent therapeutic trials in ICH. The Intensive Blood Pressure Reduction in Acute Cerebral Hemorrhage Trial (INTERACT) and Antihypertensive Treatment of Acute ...
Takahara Mitsuyoshi - - 2012
To investigate whether diabetes and regular hemodialysis are associated with false elevation of ankle systolic blood pressure and ankle-brachial systolic pressure index (ABI) because of their arterial calcification in patients with critical limb ischemia (CLI). We recruited 269 Japanese patients who underwent endovascular therapy for CLI. Ankle systolic blood pressure ...
Forman John P JP Renal Division and Channing Laboratory, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115, USA. - - 2012
A high-sodium diet has little short-term effect on blood pressure in nonhypertensive individuals but, for unclear reasons, is associated with hypertension if consumed long term. We hypothesized that a chronically high sodium intake would be associated with increases in biomarkers of endothelial dysfunction, specifically serum uric acid (SUA) and urine ...
Andreadis Emmanuel A - - 2012
We aimed to investigate the association between automated office blood pressure (AOBP) readings and urine albumin excretion (UAE), and to assess if this association is as close as that between 24-h ambulatory blood pressure (ABP) and UAE. A strong association would suggest that AOBP may serve as an indicator of ...
Virtanen Jyrki K - - 2012
Fish or fish oil consumption has been associated with lower blood pressure. Fish may also contain methylmercury, which has been associated with cardiovascular diseases and higher blood pressure. Our aim was to study the associations of serum long-chain n-3 polyunsaturated fatty acids (PUFA) eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA) and ...
Kalra Sundeep S SS BHF Centre of Research Excellence, Cardiovascular Division, King's College London, - - 2012
Vascular calcification is an active and regulated process which is integral to cardiovascular disease and intimately linked to hypertension. Dysfunctional vascular smooth muscle cells, microvesicles, and dysregulated mineralization inhibitors play key roles in the calcification process, which occurs in the vessel intima in association with atherosclerosis as well as in ...
Rao A D AD Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. - - 2013
Serum- and glucocorticoid-inducible kinase 1 (SGK1) has a central role in epithelial sodium channel (ENaC)-dependent Na(+) transport in the distal nephron. We hypothesized that SGK1 gene variants may contribute to the effect of dietary salt intake on blood pressure (BP) in humans with hypertension, and consequentially influence renin-angiotensin-aldosterone (RAA) system ...
Padmanabhan Sandosh - - 2012
Blood pressure (BP) is a complex trait regulated by an intricate network of physiological pathways involving extracellular fluid volume homeostasis, cardiac contractility and vascular tone through renal, neural or endocrine systems. Untreated high BP, or hypertension (HTN), is associated with increased mortality, and thus a better understanding of the pathophysiological ...
Han Jia - - 2012
Hypertension is an important risk factor for chronic kidney disease. The kidney, in turn, has an important role in the regulation of blood pressure (BP). On the basis of a genome-wide association study, single-nucleotide polymorphisms in the uromodulin (UMOD) promoter region had been considered to influence both renal sodium reabsorption ...
Li Xiao-Mu - - 2012
Proprotein convertase subtilisin/kexin-type 1 (PCSK1) is a prohormone convertase that has an important role in prohormone maturation including the process of prorenin to renin. We studied the association of the PCSK1 single-nucleotide polymorphism (SNP) rs6235 (encoding an S690T substitution) with essential hypertension (EH), obesity and related traits in the Han ...
Kaikkonen Jari E - - 2012
BACKGROUND: In adults, dietary fatty acids (FAs) modify blood pressure (BP), but it is not known whether childhood FA quality is associated with adulthood BP. OBJECTIVE: The purpose of the study was to investigate links between childhood serum cholesterol ester fatty acid (CEFA) proportions and adulthood systolic blood pressure (SBP) ...
Ishikura Kazuki - - 2012
We identified the factors associated with home blood pressure (BP) variability in 1933 patients treated with hypertensive drugs (mean age, 67 years; women, 55%). Multivariate regression analysis showed that female gender, advanced age, home BP value, and home heart rate variability were positively associated with home BP variability, whereas home ...
Rich David Q - - 2012
Background: Mechanisms underlying previously reported air pollution and cardiovascular (CV) morbidity associations remain poorly understood. Objectives: We examined associations between markers of pathways thought to underlie these air pollution/CV associations and ambient particle concentrations in post-infarction patients. Methods: We studied 76 patients, from June 2006 to November 2009, participating in ...
Hamrefors Viktor - - 2012
OBJECTIVE:: We aimed to test whether eight common recently identified single-nucleotide polymorphisms (SNPs), strongly associated with blood pressure (BP) in the population, also have impact on the degree of BP reduction by antihypertensive agents with different mechanisms. METHODS:: In 3863 Swedish hypertensive patients, we related number of unfavorable alleles of ...
Ruiz-Fuertes J - - 2012
High-pressure optical-absorption measurements performed in CuWO_{4} up to 20 GPa provide experimental evidence of the persistence of the Jahn-Teller (JT) distortion in the whole pressure range both in the low-pressure triclinic and in the high-pressure monoclinic phase. The electron-lattice couplings associated with the e_{g}(E⊗e) and t_{2g}(T⊗e) orbitals of Cu^{2+} in CuWO_{4} ...
Hall Jennifer L - - 2012
The prevalence of hypertension in African Americans in the USA is among the highest in the world and increasing. The identification of genes and pathways regulating blood pressure in African Americans has been challenging. An early predictor of hypertension is arterial stiffness. The prevalence of arterial stiffness is significantly higher ...
Griffiths Paula L PL School of Sport, Exercise and Health Sciences, Loughborough University, - - 2012
Factors resulting in high risk for cardiovascular disease have been well studied in high income countries, but have been less well researched in low/middle income countries. This is despite robust theoretical evidence of environmental transitions in such countries which could result in biological adaptations that lead to increased hypertension and ...
Guessous Idris - - 2012
The 15q24.1 locus, including CYP1A2, is associated with blood pressure. The CYP1A2 rs762551 C allele is associated with lower CYP1A2 enzyme activity. CYP1A2 metabolizes caffeine and is induced by smoking. The association of caffeine consumption with hypertension remains controversial. We explored the effects of CYP1A2 variants and CYP1A2 enzyme activity ...
Hong Kyung-Won - - 2012
Increased pulse pressure (PP) and decreased mean arterial pressure (MAP) are strong prognostic predictors of adverse cardiovascular events. Recently, the International Consortium for Blood Pressure Genome-Wide Association Studies (ICBP-GWAS) reported eight loci that influenced PP and MAP. The ICBP-GWAS examined 51 cohorts--comprising 122 671 individuals of European ancestry--and identified eight SNPs: ...
Skilton Michael R - - 2012
OBJECTIVE: Structural modification of the arterial adventitia may be an early event in atherosclerosis. Carotid extra-medial thickness is a new measure of arterial adventitial thickness. We examined the association of cardiovascular risk factors with extra-medial thickness, in childhood. METHODS: Carotid extra-medial thickness was assessed by high-resolution ultrasound in 389 non-diabetic ...
Stevens Gerin R - - 2012
This study investigated whether right ventricular (RV) adaptation to chronic pressure overload is associated with pulmonary artery (PA) stiffness beyond the degree of severity of pulmonary hypertension (PH). Increased PA stiffness has been associated with reduced survival in PH. The mechanisms for this association remain unclear. Right heart catheterization and ...
Malinowska Barbara - - 2012
The cannabinoids comprise three major classes of substances, including compounds derived from the cannabis plant (e.g. Δ(9) -tetrahydrocannabinol and the chemically related substances CP55940 and HU210), endogenously formed (e.g. anandamide) and synthetic compounds (e.g. WIN55212-2). Beyond their psychotropic effects, cannabinoids have complex effects on blood pressure, including biphasic changes of ...
Weber Joel R - - 2012
The term `crossover second toe' has been used to describe a deformity of the second metatarsophalangeal joint (MTPJ) that includes a progressive migration of the second toe in a dorsal and medial direction. The long onset and complex anatomy of the deformity has led to uncertainty about its etiology and ...
Wayne Erik J - - 2012
Problematic dialysis vascular access is a major health issue. The purpose of this study was to evaluate for potentially modifiable factors associated with access patency, particularly, the association of early postoperative, or maturation period, blood pressure with patency. A retrospective review was performed of patients who had undergone placement of ...
Olsén Lena - - 2012
Studies have pointed out associations between various chemicals with estrogenic activity and cardiovascular disease. Being ubiquitous, the plastic additive substances bisphenol A (BPA), and phthalates have been detected in almost all types of analyzed human samples. The aim of this study was to investigate whether circulating levels of BPA and/or ...
Schwartz Joel J Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts 02215, - - 2012
Particulate air pollution is associated with cardiovascular events, but the mechanisms are not fully understood. The main objective was to assess the relationship between long-term exposure to traffic-related air pollution and blood pressure (BP). The authors used longitudinal data from 853 elderly men participating in the Veterans Administration Normative Aging ...
Fahim Mohammad M Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska, USA. - - 2012
Neurohumoral disturbances characterize chronic heart failure (CHF) and are reflected, in part, as impairment of baroreflex sensitivity (BRS) and sympathetic function. However, the mechanisms that trigger these neurohumoral abnormalities in CHF are not clear. We hypothesized that the BRS is blunted early in CHF and that the humoral effects occur ...
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