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Results 251 - 300 of 1020
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Kalaycio─člu Ezgi - - 2013
OBJECTIVE: 24-h ambulatory blood pressure monitoring (24-h ABPM) is a better predictor of cardiovascular events (CVEs) than spot blood pressure (BP) measurements in hypertensive diabetic patients. In this patient group, the underlying mechanism of the relationship between a nondipper pattern determined with 24-h ABPM and increased incidence of CVE is ...
Fellahi Jean-Luc - - 2013
PURPOSE: The present study aimed to compare peripheral regional tissue oxygen saturation (rSO2) values and desaturation/resaturation rates given by INVOS and EQUANOX devices. MATERIALS AND METHODS: Twenty healthy volunteers were investigated during 4 experimental steps: baseline, hyperoxia, ischemia, and reperfusion. For each volunteer, 2 sensors INVOS and 2 sensors EQUANOX ...
Voegele Aaron C - - 2013
Abstract Vessel sealing devices effectively produce hemostatic seals with minimal thermal damage, but the strength of seals decreases as vessel diameter increases. Because vessels sealed at an angle to the vessel require a greater functional seal diameter than those sealed perpendicularly to the vessel, it was hypothesized that perpendicular seals ...
Bubb Kristen J - - 2013
A rise in intraluminal pressure triggers vasoconstriction in resistance arteries, which is associated with local generation of the vasoconstrictor 20-hydroxyeicosatetraenoic acid (20-HETE). Importantly, dysregulation of 20-HETE synthesis and activity has been implicated in several cardiovascular disease states, including ischemic disease, hypertension, and stroke; however, the exact molecular pathways involved in ...
Coca Antonio - - 2013
Abstract BACKGROUND: Vascular dementia (VaD) - a severe form of vascular cognitive impairment - and cognitive decline are associated with hypertension and therefore it seems logical to consider that reducing BP with anti-hypertensive therapy may protect against the development/onset of cognitive function impairment or dementia. SCOPE: This narrative, non-systematic review ...
Nilsson Peter M - - 2013
The influence of chronological ageing on the components of the cardiovascular system is of fundamental importance for understanding how hemodynamics change and the cardiovascular risk increases with age, the most important risk marker. An increase in peripheral vascular resistance associated with increased stiffness of central elastic arteries represents hallmarks of ...
Idei Naomi - - 2013
It is clinically important to estimate the degree of endothelial dysfunction. Several methods have been used to assess endothelial function in humans. Recently, we developed a new noninvasive method for measurement of vascular response to reactive hyperemia in the brachial artery, named enclosed zone flow-mediated vasodilation (ezFMD). The purpose of ...
Sips Patrick Y PY Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Thier 511B, Boston, MA - - 2013
Hypertension is an important modifiable risk factor for coronary heart disease, congestive heart failure, stroke, end-stage renal disease, and peripheral vascular disease, but many of the molecular mechanisms and genetic factors underlying the development of the most common forms of human hypertension remain to be defined. Abundant evidence suggests that ...
Cunha Ana Rosa - - 2013
Magnesium has been implicated in the pathogenesis of hypertension, but the role of its intracellular levels in cardiovascular diseases is not clear yet. We investigated the relationships of low concentrations of serum magnesium (sMg) and intracellular Mg (iMg) with clinical and vascular parameters. Thiazide-treated hypertensive women were separated into two ...
Chen Chao - - 2013
To observe the impact of Shijueming (Concha Haliotidis) on spontaneously hypertensive rats via blood pressure, serum calcium, vascular smooth muscle membrane L-type calcium channel alpha1 C subunit (CaL-alpha1C), plasma membrane calcium-ATPase (PMCA) mRNA expression, and the L-type calcium channel in vascular smooth muscle cells. Twelve-week-old male rats with spontaneous hypertension ...
Sharath Umesh U Indian Institute of Science, Department of Instrumentation and Applied Physics, Bangalore 560012, - - 2013
We report a blood pressure evaluation methodology by recording the radial arterial pulse waveform in real time using a fiber Bragg grating pulse device (FBGPD). Here, the pressure responses of the arterial pulse in the form of beat-to-beat pulse amplitude and arterial diametrical variations are monitored. Particularly, the unique signatures ...
Ciobanu Andrea O AO "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania ; Cardiology Department, University Emergency Hospital, Bucharest, - - 2013
Blood pressure variability (BPV) was proved as a cardiovascular risk factor. One of its mechanisms is related to arterial stiffness and ventriculo-arterial coupling; however its impact on subclinical cardiovascular dysfunction has not been evaluated yet. To assess the relationship between BPV on 24 hours, and subclinical left ventricle (LV), ...
Synetos Andreas - - 2013
Arterial hypertension is an epidemic currently affecting almost a billion people worldwide. The consequences from high blood pressure vary, from peripheral arterial disease and chronic kidney failure to acute myocardial infarction and stroke. MicroRNAs (miRNAs) are small non-coding RNA molecules comprised of 22-26 nucleotides and provide post-transcriptional protein expression regulation. ...
Nwokocha Chukwuemeka R - - 2013
Apocynin is reported to have antioxidant and NADPH oxidase inhibitor activities. Cadmium toxicity is reported to causes oxidative damage, resulting in vascular dysfunction, reduced bioavailability of nitric oxide (NO) and hypertension. The study aimed to investigate the protective effects of apocynin in cadmium-induced hypertension. Thirty-six (36) adult male Sprague-Dawley rats ...
Büsst Cara J - - 2013
epithelial sodium channel (ENaC) has long been recognised to play a vital role in blood pressure (BP) regulation due to its involvement in fluid balance. The genes encoding the three ENaC subunits are likewise important contributors to hypertension both in rare monogenic diseases and in the general population. The unusually ...
Flavahan Sheila S Department of Anesthesiology, Johns Hopkins University, Baltimore, MD 21205, - - 2013
Experiments investigated maturation of endothelial function in the postnatal period. Carotid arteries isolated from newborn (postnatal day 1, P1) to P21 mice were assessed in myographs at transmural pressure (PTM) of 20 mmHg (P1 blood pressure, BP). Acetylcholine was ineffective in P1 but powerfully dilated P7 arteries, whereas NO-donor DEA-NONOate ...
Halberg Franz F University of Minnesota Academic Health Center, Minneapolis, MN 55455, - - 2013
Chronobiology is the study of biological rhythms. Chronomics investigates interactions with environmental cycles in a genetically coded autoresonance of the biosphere with wrangling space and terrestrial weather. Analytical global and local methods applied to human blood pressure records of around-the-clock measurements covering decades detect physiological-physical interactions, a small yet measurable ...
Kaiser Sérgio E - - 2013
OBJECTIVE: To test whether long-term anti-hypertensive treatment with metoprolol succinate (a β1 -adrenoceptor blocker) or olmesartan medoxomil (an angiotensin II AT1 -receptor blocker) reverses microvascular dysfunction in hypertensive patients. METHODS: This study included 44 hypertensive outpatients and 20 age and sex-matched healthy controls. We used skin capillaroscopy to measure capillary ...
Diamantouros Stefanos E - - 2013
The aim of the study was to design, construct, and test a bioreactor for the conditioning of tissue-engineered vascular grafts under physiological pressure, flow, and environmental conditions and up to supra-physiological pulse frequencies (5 Hz) as the first step towards durability testing. The system also allows the calculation of the compliance ...
Kong Xiang - - 2013
INTRODUCTION: This study was designed to investigate the underlying mechanisms of synergistic antihypertensive effect produced by combination therapy of losartan and pioglitazone in metabolic syndrome (MS) rats. MATERIALS AND METHODS: An MS model was induced by feeding rats a high-fat, high-sodium diet and 20% sucrose solution. Losartan (20 mg/kg/day), pioglitazone ...
Graff Beata - - 2013
Previous studies reported that normobaric hyperoxia influences heart rate, arterial pressure, cardiac output and systemic vascular resistance, but the mechanisms underlying these changes are still not fully understood. Several factors are considered including degeneration of endothelium-derived nitric oxide by reactive oxygen species, the impact of oxygen-free radicals on tissues and ...
Hsu Shao-Jung - - 2013
Abstract Objective. Endothelin-1 (ET-1) exerts vasoconstrictive effect on portal-systemic collateral vascular bed of portal hypertensive rats. Statins are lipid-lowering agents with nitric oxide (NO)-related vasodilatory effects. Considering NO-associated vascular hyporesponsiveness to vasoconstrictors and shunting formation in portal hypertension, this study investigated the effects of simvastatin on 1) the portal-systemic collateral ...
Dushay Jody R - - 2013
OBJECTIVE: The objective of this paper is to study the effect of aliskiren on metabolic parameters and micro- and macrovascular reactivity in individuals diagnosed with or at high risk for developing type 2 diabetes mellitus (T2DM).Research design and methods:We studied 47 T2DM and 41 at-risk individuals in a randomized, double-blinded, ...
Dongaonkar R M RM Michael E. DeBakey Institute, Texas A&M University, College Station, TX 77843-4466, - - 2013
In vitro studies have revealed that acute increases in transmural pressure increase lymphatic vessel contractile function. However, adaptive responses to prolonged changes in transmural pressure in vivo have not been reported. Therefore, we developed a novel bovine mesenteric lymphatic partial constriction model to test the hypothesis that lymphatic vessels exposed ...
Paine Nicola J - - 2013
Mental stress can trigger myocardial infarction, with poor vascular responses to stress implicated as a pathway. Vascular stress reactivity can be assessed by different methods, such as total peripheral resistance (TPR) and forearm blood flow (FBF). Little is known about how these vascular assessments are linked. This was examined in ...
Koh-Tan H H Caline - - 2013
In an F2 cross between stroke-prone spontaneously hypertensive (SHRSP) and Wistar Kyoto (WKY) rats, we previously identified blood pressure quantitative trait loci (QTL) on rat chromosome (RNO) 2 and a pulse pressure QTL on RNO3. The aims of this study were to confirm the QTL on RNO3 and to investigate ...
Eguchi K - - 2013
The effects of percutaneous transluminal angioplasty (PTA) on hemodynamic parameters are not established. We tested the hypothesis that PTA would achieve reductions in hemodynamic and target organ damage (TOD) measures in patients with peripheral artery disease (PAD). We enrolled 56 consecutive PAD patients who were scheduled to undergo elective PTA ...
Björkvist Jenny - - 2013
Abstract Contact to polyanions induces autoactivation of the serine protease factor XII that triggers the kallikrein kinin-system. Recent studies indicate that polysaccharide-induced autoactivation of factor XII has a role in allergy-related vascular leakage, and angioedema. Here, we characterize in vivo effects of the synthetic polysaccharide dextran sulfate in human plasma ...
Nelson Lucy - - 2013
Evidence supporting a link between vascular disorders such as hypertension and Alzheimer's disease (AD) is increasing. Population studies have suggested an association between hypertension and an increased risk of developing AD. A potential role for antihypertensive medications in the management of cognitive disorders has also been suggested, although findings are ...
Kim Seong Kee - - 2013
We introduce a case of blindness after a periorbital fat graft and its resulting court ruling in regard to a surgeon's liability of compensation. A 19-year-old woman received an injection of preserved autologous fat to her nasal dorsum. During the injections, she complained of pain and lost vision of her ...
Pradhan Nishigandha - - 2013
Renal artery stenosis especially that due to atherosclerotic peripheral vascular disease is increasing in the population. The role of the renin angiotensin aldosterone system in the pathogenesis of renovascular hypertension is widely accepted. There is increasing recognition of the role of the sympathetic nervous system, from both afferent and efferent ...
Blaine Easley R R Baylor College of Medicine, Texas Children's Hospital, Houston, TX 77030, USA. - - 2013
Cerebrovascular autoregulation can be monitored with a moving linear correlation of blood pressure to cerebral blood flow velocity (mean velocity index, Mx) during cardiopulmonary bypass (CPB). Vascular reactivity can be monitored with a moving linear correlation of blood pressure to cerebral blood volume trended with near-infrared spectroscopy (hemoglobin volume index, ...
Ciccone Marco Matteo - - 2013
Purpose:According to the literature, estradiol has a direct vasodilator action by means of endothelium-derived relaxing factor synthesis. The present study aims to evaluate the acute hemodynamic effects of intranasal 17-β-estradiol on cerebral and lower limb arterial circulation in postmenopausal women. METHODS: Sixteen healthy women in natural menopause (mean age: 54 ...
Diaz K M - - 2013
The purpose of this study was to investigate the association of visit-to-visit and 24-h blood pressure (BP) variability with markers of endothelial injury and vascular function. We recruited 72 African Americans who were non-diabetic, non-smoking and free of cardiovascular (CV) and renal disease. Office BP was measured at three visits ...
Montezano Augusto - - 2013
Significance. Reactive oxygen species (ROS) are signaling molecules important in physiological processes including host defense, aging and cellular homeostasis. Increased ROS bioavailability and altered redox signalling (oxidative stress) have been implicated in the onset and/or progression of chronic diseases including hypertension. Recent advances: Although oxidative stress may not be the ...
Dullinger Stefan - - 2013
Rapid economic development in the past century has translated into severe pressures on species survival as a result of increasing land-use change, environmental pollution, and the spread of invasive alien species. However, though the impact of these pressures on biodiversity is substantial, it could be seriously underestimated if population declines ...
Muñoz-Durango N - - 2013
Hypertension is traditionally considered a disease in which elevated blood pressure contributes to inflammation and activation of the immune system, leading to cardiovascular injury and end-organ damage. Here, we discuss the effects of aldosterone on the immune system and aldosterone's contribution to vascular pathogenesis. Studies in human have suggested a ...
Limberg Jacqueline K JK Bruno Balke Biodynamics Laboratory, Department of Kinesiology, School of Education, University of Wisconsin, Madison, WI, - - 2013
In patients with hypertension, volitional slowing of the respiratory rate has been purported to reduce arterial pressure via withdrawal of sympathetic tone. We examined the effects of paced breathing at 7, 14, and 21 breaths/min, with reciprocal changes in tidal volume, on muscle sympathetic nerve activity, forearm blood flow, forearm ...
Okamoto Takanobu - - 2013
Flexibility is associated with arterial distensibility. Many individuals involved in sport, exercise and/or fitness perform self-myofascial release (SMR) using a foam roller, which restores muscles, tendons, ligaments, fascia and/or soft-tissue extensibility. However, the effect of SMR on arterial stiffness and vascular endothelial function using a foam roller is unknown. The ...
Ott Christian - - 2013
Pulse pressure has been recognized as a risk factor for stroke. Moreover, it was shown that central pulse pressure relates more strongly to vascular disease and outcome than (peripheral) brachial pulse pressure. Because vascular remodeling in the retinal circulation mirrors the 1 in the cerebral circulation and represents an easy, ...
Kouguchi Tomomi - - 2013
We investigated the effects of a chicken collagen hydrolysate (CCH) on the circulation system in humans. A total of 58 subjects with either mild hypertension (systolic blood pressure (SBP) of 140-159 mm Hg or diastolic blood pressure (DBP) 90-99 mm Hg) or high-normal blood pressure (SBP 130-139 mm Hg or ...
Fujita Yasuyuki - - 2013
BACKGROUND: Augmentation index (AI) is calculated from the central arterial pressure or pulse waveform and known as a parameter to evaluate arterial vascular function in adults. Patients with deterioration of peripheral circulation will demonstrate increased AI values as well as those with cardiovascular risks. It is because increased AI is ...
Curtis Peter J - - 2013
BACKGROUND: In healthy participants, short-term flavan-3-ol and isoflavone intakes improve vascular function; however, the potential combined benefit of these compounds on atherosclerosis progression remains unclear for those at elevated risk of cardiovascular disease. OBJECTIVE: The objective was to examine whether combined isoflavone and flavan-3-ol intake alters vascular function in postmenopausal ...
Araujo Ayslan Jorge Santos de - - 2013
BACKGROUND: Arterial hypertension is a multifactorial chronic condition caused by either congenital or acquired factors. OBJECTIVE: To evaluate the effects of Resistance Training (RT) on arterial pressure, and on vascular reactivity and morphology, of L-NAME-treated hypertensive rats. METHODS: Male Wistar rats (200 - 250 g) were allocated into Sedentary Normotensive ...
Guo Jian-Qiang - - 2013
Aliskiren is a novel blood pressure-lowering agent acting as an oral direct renin inhibitor. The aim of this study was to assess the effect of aliskiren on arterial stiffness, compared with that of ramipril in mild to moderate essential hypertensive patients. Following a two week placebo run-in period, patients with ...
Kienreich Katharina - - 2013
Vitamin D is mainly derived from endogenous ultraviolet-B induced vitamin D synthesis in the skin, and the current high prevalence of vitamin D deficiency can, therefore, largely be attributed to lifestyle related low sunlight exposure. Regulation of bone and mineral metabolism is a classic vitamin D effect, but the identification ...
Gilbert Kimberly K Department of Medicine, Vanderbilt School of Medicine, Nashville, Tennessee, - - 2013
Peroxisome proliferator-activated receptor α agonists reduce blood pressure in rodents, but clinical trials provide conflicting data regarding their effects in humans. We tested the hypothesis that the effect of fenofibrate on blood pressure depends on salt sensitivity. Thirty-one hypertensive volunteers (17 salt-resistant, 14 salt-sensitive) completed a randomized, crossover, double-blind protocol ...
Blann A D - - 2013
Vascular function is an important pathophysiological factor in cardiovascular disease, and is influenced by many factors, one of the principles being hypertension. Developing evidence suggests that inflammation may be another risk factor. Vascular function and blood pressure haemodynamics can be assessed by arterial stiffness, pulse pressure and plasma markers. Testing ...
Zena Lucas A - - 2013
The goal of the present study was to determine if nitric oxide (NO) acting on the brain of bullfrog (Lithobates catesbeianus) is involved in arterial pressure and heart rate (HR) control by influencing sympathetic activity. We investigated the effect of intracerebroventricular injections of L-NMMA (a nonselective NO synthase inhibitor) on ...
Shimizu Kazuhiro - - 2013
Aims: The incidence of cardiovascular events increases after a large earthquake, but the mechanism is not fully understood. The cardio-ankle vascular index (CAVI) reflects the stiffness of the artery from the origin of the aorta to the ankles and is independent of blood pressure. To determine the effect of a ...
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