Search Results
Results 51 - 100 of 726
1 2 3 4 5 6 7 8 9 10 >
Rossi Gian Paolo - - 2010
Primary aldosteronism (PA) is a common cause of arterial hypertension: in the PA Prevalence in Hypertensives (PAPY) Study, the prevalence of PA was 11.2% in consecutive referred hypertensive patients. When adrenal vein sampling (AVS) is available, two thirds of the cases can be attributed to a tumor and one third ...
Yagi Shusuke - - 2011
Cognitive impairment leading to dementia is associated with high prevalence of hypertension, decreased quality of life and poor prognosis. Aldosterone is known as a risk factor for cardiovascular and cerebrovascular diseases. In addition, mineral corticoid receptors are abundantly expressed in the hippocampus, which plays a pivotal role in cognitive function; ...
Tapolyai Mihály - - 2010
Liddle syndrome (LS) is an autosomal dominant disorder due to a gain-of-function mutation in the epithelial Na(+) channel and is perceived to be a rare condition. A cross-sectional study of 149 hypertensive patients with hypokalemia (<4 mmol/dL) or elevated serum bicarbonate (>25 mmol/dL) was conducted at a Veterans' Administration Medical ...
Grimm P Richard PR Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland, - - 2010
Large, Ca-activated K channels (BK) are comprised of an α pore (BKα) and one of four β subunits (BKβ1-4). When the gene for BKβ1 is knocked out (BKβ1-KO), the result is increased myogenic tone of vascular smooth muscle and hypertension. We reexamined whether the hypertension is entirely due to increased ...
Wang Qing - - 2010
The cardiovascular system is under the control of the circadian clock, and disturbed circadian rhythms can induce cardiovascular pathologies. This cyclic regulation is probably brought about by the circadian expression of genes encoding enzymes and regulators involved in cardiovascular functions. We have previously shown that the rhythmic transcription of output ...
Boschitsch E - - 2010
The age-related course of blood pressure and its gender-related difference, as well as the incidence of hypertension, have been the subject of multiple experimental, clinical and epidemiological studies over the past decades. The role of the sex hormones estradiol and testosterone within this gender dimorphism has been investigated without conclusive ...
Kurata M - - 2011
Osteopontin (OPN) has recently emerged as a key factor in both vascular remodelling and development of atherosclerosis. It has been reported that OPN is regulated by the renin-angiotensin-aldosterone system (RAAS). The aim of this study was to clarify the effect of angiotensin II receptor blockade with valsartan on plasma OPN ...
Kontak Andrew C - - 2010
Aldosterone has been shown to exert a central sympathoexcitatory action in multiple animal models, but evidence in humans is still lacking. Our objective was to determine whether hyperaldosteronism causes reversible sympathetic activation in humans. We performed a cross-sectional comparison of muscle sympathetic nerve activity (SNA, intraneural microelectrodes) in 14 hypertensive ...
Gao Jian Ping - - 2010
Ventricular remodeling is an independent risk factor for many cardiovascular events. Inhibiting ventricular remodeling early may be an effective way to postpone heart failure for patients with cardiovascular illness. The study was designed to examine the effect of sodium houttuyfonate on ventricular remodeling induced by pressure overload in rats, as ...
Paulis Ludovit - - 2010
Despite the existence of established, effective therapies for hypertension, new methods of blood pressure and cardiovascular risk reduction are still needed. Novel approaches are targeted towards treating resistant hypertension, improving blood-pressure control, and achieving further risk reduction beyond blood-pressure lowering. Modulation of the renin-angiotensin-aldosterone system (RAAS) provides the rationale for ...
Sun Bei B Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, - - 2010
Beta(2)-adrenergic receptor (beta2-AR) is a susceptibility locus for hypertension, and polymorphisms at this site relate to salt sensitivity and low plasma renin activity (PRA). The Dietary Approaches to Stop Hypertension (DASH) dietary pattern lowers blood pressure and appears to interact with the renin-angiotensin-aldosterone system (RAAS). We hypothesized that the DASH ...
Fu Qi Q Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, Tex 75231, USA. - - 2010
Approximately 500,000 American premenopausal women have the postural orthostatic tachycardia syndrome (POTS). We tested the hypothesis that in POTS women during orthostasis, activation of the renin-angiotensin-aldosterone system is greater, leading to better compensated hemodynamics in the midluteal phase (MLP) than in the early follicular phase of the menstrual cycle. Ten ...
Tomaschitz Andreas - - 2010
OBJECTIVES: With the present analysis we intended to investigate the magnitude of the effect of relative aldosterone excess in predicting peripheral as well as aortic blood pressure levels in a well-characterized cohort of patients undergoing coronary angiography. BACKGROUND: The discussion on the relationship between aldosterone concentration and blood pressure has ...
Bubien James K - - 2010
This minireview examines both the basic science and clinical observations over the past 20 years to show how and why overstimulation of the amiloride-sensitive epithelial Na(+) channel (ENaC) expressed by epithelial principal cells of the renal collecting duct may be responsible for a large portion of hypertension in modern society. ...
Hirai Hidekazu - - 2010
A 38-year-old man had Stanford type B chronic aortic dissection. Blood pressure was difficult to control, and further examination revealed primary aldosteronism. Magnetic resonance images showed a 1-cm nodule in the left adrenal gland. Graft replacement for aortic dissection under extracorporeal circulation and resection of the left adrenal gland were ...
Wray D Walter DW Division of Geriatrics, Department of Internal Medicine, University of Utah, Salt Lake City, UT 84132, USA. - - 2010
Aldosterone receptor blockade and thiazide therapy effectively lower blood pressure in geriatric hypertension. Their impact on sympathetic nervous system function has not been evaluated. In a double-blind, randomized study, 36 patients with stage 1 hypertension underwent 6 months of therapy with either aldosterone receptor blockade (spironolactone, n=19; 68+/-1 years) or ...
Börgel Jan - - 2010
Hypertensive urgency/emergency occurs frequently, yet no prospective data on common secondary causes, including sleep apnea (SA), renal artery stenosis (RAS), and hyperaldosteronism, are available. Patients presenting to the emergency room for over 1 year with systolic blood pressure > or =180 mmHg and/or diastolic blood pressure > or =100 mmHg ...
Martinez-Aguayo Alejandro - - 2010
Aldosterone plays an important role in blood pressure homeostasis, the regulation of circulating volume, and the maintenance of the sodium-potassium balance by binding to the mineralocorticoid receptor (MR). Primary aldosteronism (PA) states are associated with an increased cardiovascular risk, mediated not only by hypertension but also by the action of ...
Gaddam Krishna K Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA. - - 2010
We have shown previously that patients with resistant hypertension and hyperaldosteronism have increased brain natriuretic peptide suggestive of increased intravascular volume. In the present study, we tested the hypothesis that hyperaldosteronism contributes to cardiac volume overload. Thirty-seven resistant hypertensive patients with hyperaldosteronism (urinary aldosterone > or = 12 microg/24 hours ...
Chapman Arlene B AB Emory University School of Medicine, Atlanta, GA, USA. - - 2010
Hypertension is common and occurs in a majority of autosomal dominant polycystic kidney disease (ADPKD) patients before the loss of kidney function. Hypertension relates to progressive kidney enlargement and is a significant independent risk factor for progression to ESRD. The pathogenesis of hypertension in ADPKD is complex and dependent on ...
Catena C - - 2010
Recent evidence indicates a greater frequency of primary aldosteronism (PA) among patients with hypertension than the previously accepted prevalence. PA was once considered a relatively benign form of hypertension associated with low incidence of organ complications. Recent views, however, suggest that long-term exposure to increased aldosterone levels might result in ...
Trésallet Christophe - - 2010
Primary hyperaldosteronism (PHA) is potentially curable by laparoscopic unilateral adrenalectomy (LUA). Pre-operative assessment rarely differentiates adrenal adenoma from hyperplasia. This study aimed to evaluate the results of LUA for PHA according to pathologic findings when an adrenal mass was identified unequivocally on a CT scan. A retrospective analysis of LUA ...
Quinkler M - - 2010
Patients presenting with primary aldosteronism experience more cardiovascular events than patients with essential hypertension independent of blood pressure. Therefore, the presence of primary aldosteronism should be detected, not only to determine the cause of hypertension, but also to prevent such complications. This review focuses on human data regarding increased end-organ ...
Nishiyama Akira - - 2010
The role of angiotensin II in mediating hypertension and renal diseases is well documented, and inhibition of the renin-angiotensin-aldosterone system elicits antihypertensive and renoprotective effects. There is increasing evidence implicating aldosterone, in addition to angiotensin II, in the pathogenesis of hypertension and renal diseases. Beneficial effects of mineralocorticoid receptor (MR) ...
Siragy Helmy M - - 2010
Hypertension is characterized by endothelial dysfunction and increased risk for adverse cardiovascular outcomes. In addition to lowering blood pressure, the calcium-channel blocker amlodipine and blockers of the renin-angiotensin-aldosterone system (angiotensin-converting enzyme inhibitors and angiotensin II type 1 receptor blockers) may further reduce cardiovascular risk by improving endothelial function when used ...
Sumino Hiroyuki - - 2010
AIM: An increase in blood pressure after menopause has been documented. The renin-angiotensin-aldosterone system (RAAS) plays a central role in the regulation of blood pressure and in the pathophysiology of hypertension. This study investigated the effects of raloxifene, a selective estrogen receptor modulator, on components of the RAAS and blood ...
Amar Laurence - - 2010
Surgically correctable forms of primary aldosteronism are characterized by unilateral aldosterone hypersecretion and renin suppression, associated with varying degrees of hypertension and hypokalemia. Unilateral aldosterone hypersecretion is caused by an aldosterone-producing adenoma (also known as Conn's adenoma and aldosteronoma), primary unilateral adrenal hyperplasia and rare cases of aldosterone-producing adrenocortical carcinoma. ...
Salgado Diamantino Ribeiro - - 2010
IMPORTANCE OF THE FIELD: Severe sepsis is characterized by relative hypotension associated with a high cardiac output, peripheral vasodilation, and organ dysfunction. The renin-angiotensin-aldosterone system (RAAS) is primarily activated to increase blood pressure, but recently potential pro-inflammatory effects of angiotensin II have attracted interest because of the reported association between ...
Ritz Eberhard - - 2010
Aldosterone was in the past considered only as a prohypertensinogenic agent. It has recently become clear that apart from the classical endocrine action, i.e. causing blood pressure elevation as a result of salt retention, aldosterone has numerous blood-pressure-independent actions on nonepithelial tissue. Under conditions of high salt concentration, aldosterone is ...
Nishiyama Akira - - 2010
The critical role played by the renin-angiotensin-aldosterone system (RAAS) in the regulation of blood pressure and body fluid homeostasis has been well recognized. Angiotensin (Ang) II and aldosterone are the most powerful biologically active products of the RAAS, although there are also other bioactive Ang peptides involved in this system, ...
Kondo Tatsuya - - 2010
OBJECTIVE: In hypertensive patients, primary aldosteronism (PA) is the most prevalent type of secondary hypertension, and screening for PA has become very important. Calcium channel blockers (CCB) are widely used to treat hypertension, but most CCBs stimulate plasma renin activity (PRA) and increase plasma aldosterone concentration (PAC), both of which ...
Ibuki Chikao C Department of Cardiology, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Japan. - - 2010
A 29-year-old woman with refractory hypertension who previously suffered from subarchnoid hemorrhage visited our facility. The diagnosis of renovascular hypertension due to fibromuscular dysplasia was made based on a high level of plasma renin activity (PRA) and aldosterone concentration (AC), and computed tomographic image of bilateral renal artery stenosis/obstruction. Angioplasty, ...
Parthasarathy Hari K HK Department of Cardiology, Papworth Hospital, Cambridge, - - 2010
We hypothesized that the aldosterone: renin ratio (ARR) predicts the antihypertensive response to mineralocorticoid receptor antagonist, spironolactone (SPIRO), when compared with bendroflumethiazide (BFZ). We conducted a randomized, crossover, trial on hypertensive patients with either high ARR (HARR defined as >750 and plasma aldosterone >250 pmol/l) or low ARR (LARR defined ...
Tomaschitz Andreas - - 2010
In the setting of primary aldosteronism, elevated aldosterone levels are associated with increased blood pressure. Aldosterone concentrations within the normal range, however, can also alter blood pressure. Furthermore, the aldosterone-to-renin ratio, an indicator of aldosterone excess, is associated with hypertension, even in patients without excessive absolute aldosterone levels. In this ...
Gaddam K K Division of Cardiovascular Diseases, Ochsner Clinic Foundation, New Orleans, LA, - - 2010
Obstructive sleep apnoea (OSA) and hyperaldosteronism are very common in subjects with resistant hypertension. We hypothesized that aldosterone-mediated chronic fluid retention may influence OSA severity in patients with resistant hypertension. We tested this in an open-label evaluation by assessing the changes in the severity of OSA in patients with resistant ...
Vogt Bruno - - 2009
Through its classic effects on sodium and potassium homeostasis, aldosterone, when produced in excess, is associated with the development of hypertension and hence with higher cardiovascular and renal risk. In recent years, experimental and epidemiologic data have suggested that aldosterone also may be linked to high cardiovascular risk independently of ...
Bomback A S - - 2009
BACKGROUND: For some hypertensive patients, conventional blockade of the renin-angiotensin-aldosterone system with angiotensin-converting enzyme (ACE) inhibitors or angiotensin receptor blockers does not adequately protect against target organ damage. This may be particularly true for hypertensive patients with obesity, a condition often associated with elevated aldosterone levels. METHODS: We conducted a ...
Seeliger Erdmann - - 2010
1. Total body sodium (TBS) is known as major determinant of arterial blood pressure (ABP) when TBS is increased, but little is known about ABP control following a deficit in TBS. The renin-angiotensin-aldosterone system (RAAS) controls ABP by controlling TBS via the Na-retaining effects of angiotensin (Ang) II and aldosterone, ...
Ferrari Paolo - - 2010
Cortisol and aldosterone have the same in vitro affinity for the mineralocorticoid receptor (MR), although in vivo only aldosterone acts as a physiologic agonist of the MR, despite circulating levels of cortisol in humans and corticosterone in rodents being three orders of magnitude higher than aldosterone levels. In mineralocorticoid target ...
Pisoni Roberto R Vascular Biology and Hypertension Program, University of Alabama at Birmingham, 115 Community Health Services Building, 933 19th Street South, Birmingham, AL 35294, USA. - - 2009
Resistant hypertension is a common medical problem. It carries a significantly increased risk of end-organ damage and cardiovascular events compared with more easily controlled hypertension. Resistant hypertension is most often related to isolated systolic hypertension and is characterized by aldosterone excess and increased intravascular volume. Its diagnosis requires the exclusion ...
Sato A A Department of Internal Medicine, International University of Health and Welfare Mita Hospital, Tokyo, Japan. - - 2010
Eplerenone, a selective aldosterone blocker, has become clinically available in Japan since 2007. It has been reported that eplerenone has a potential antihypertensive effect, with a profile slightly different from that of spironolactone, and has fewer adverse reactions, suggesting that it may become a first-line treatment for hypertension. However, clinical ...
Sam Flora F Whitaker Cardiovascular Institute, Boston University School of Medicine, 715 Albany Street, Boston, Massachusetts 02118, USA. - - 2010
Aldosterone infusion results in left ventricular hypertrophy (LVH) and hypertension and may involve profibrotic and proinflammatory mechanisms. In turn, hypertension is the major cause of diastolic heart failure (HF). Adiponectin, an adipose-derived plasma protein, exerts antiinflammatory and anti-hypertrophic effects and is implicated in the development of hypertension and systolic HF. ...
Sturgis LaShon C - - 2009
Knockout (KO) of IL-6 has been shown to attenuate ANG II hypertension, and mineralocorticoid receptors (MR) have been reported to contribute to the increase in IL-6 during acute ANG II infusion. This study determined whether that MR action is sustained with chronic ANG II infusion and whether it plays a ...
Donner Kati M - - 2009
BACKGROUND: Two variants of the CYP2C9 gene, CYP2C9*2 and CYP2C9*3, have been indicated to have impaired enzyme function, and thus suspected to reduce the formation of the active metabolite of losartan. Cytochrome P450 (CYP) enzymes are also involved in eicosanoid biosynthesis and regulation of blood pressure (BP) and sodium homeostasis. ...
Stowasser Michael M Hypertension Unit, University of Queensland School of Medicine, Princess Alexandra Hospital, Woolloongabba Brisbane 4102, Australia. - - 2009
It is now widely recognized that primary aldosteronism (PA) is much more common than previously thought, accounting for up to 5-10% of hypertensives, and that aldosterone excess has adverse cardiovascular consequences that go above and beyond hypertension development. These findings have precipitated a marked resurgence of research activity, most of ...
- - 2009
BACKGROUND: Autonomous secretion of aldosterone in patients with primary aldosteronism increases glomerular filtration rate and causes kidney damage. The influence of a mild decrease in kidney function on residual hypertension after adrenalectomy is unexplored. STUDY DESIGN: Nonconcurrent prospective study. SETTING & PARTICIPANTS: The study was based on the Taiwan Primary ...
Wilson Richard M - - 2009
Hypertension-induced diastolic heart failure accounts for a large proportion of all heart failure presentations. Hypertension also induces left ventricular (LV) hypertrophy. Fixed-dose isosorbide dinitrate/hydralazine (HISDN) decreased mortality in human systolic heart failure but it is unknown whether it improves maladaptive myocardial remodeling. We sought to test the hypothesis that chronic ...
Watson Timothy - - 2009
INTRODUCTION: Primary aldosteronism (PA) is caused by autonomous hypersecretion of aldosterone from the adrenal cortex, classically from an adenoma, resulting in sodium and water retention, hypokalaemia and raised blood pressure. The sodium and water retention causes suppression of renin release. The possible cardiac sequelae of aldosterone excess are encountered primarily ...
Acelajado Maria Czarina - - 2009
PURPOSE OF REVIEW: Resistant hypertension is found in an important and rapidly growing subset of the hypertensive population, and data characterizing this group of patients are limited. The purpose of this review is to present the latest evidence on resistant hypertension, its risk factors, patient characteristics, and approach to diagnosis. ...
Mulatero Paolo - - 2009
Primary aldosteronism (PA) is the most frequent endocrine form of secondary hypertension. The recognition of this disease has dramatically increased with the widespread use of a screening test in most hypertensive patients, including those who are normokalemic. Interest in PA has grown since the demonstration that aldosterone has deleterious effects ...
1 2 3 4 5 6 7 8 9 10 >