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Results 451 - 500 of 1679
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Ptak Judy A - - 2013
We describe a case of a 46-yr-old female who developed hypertension, tachycardia, dysarthria, and leg weakness provoked by pressure changes associated with flying. Typically during the landing phase of flight, she would feel dizzy and note that she had difficulty with speech and leg weakness. After the flight the leg ...
Chemla Denis - - 2013
The mean pulmonary artery pressure (mPAP) replaces mean systolic ejection pressure (msePAP) in the classic formula of right ventricular stroke work (RVSW) = (mPAP - RAP) × stroke volume, where RAP is mean right atrial pressure. Only the steady work is thus taken into account, not the pulsatile work, whereas ...
Al Bannay Rashed - - 2013
OBJECTIVE: To study the clinical significance of presenting blood pressure parameters and heart rate in patients with hypertensive crisis. METHODS: In patients admitted with hypertensive crisis between January 2011 and May 2011, demography, mode of presentation, co-morbidities, blood pressure readings, and heart rate at presentation were documented. Further clustering of ...
Lu Zhibing - - 2013
BACKGROUND: The underlying mechanism of atrial fibrillation (AF) in association with hypoxia remains unclear. This study aimed to investigate the AF vulnerability in an acute intermittent hypoxia model and ascertained the mechanism. METHODS AND RESULTS: In 15 anesthetized open-chest dogs (10 experimental and 5 control), multiple-electrode catheters were sutured to ...
Campbell Tavis S - - 2013
BACKGROUND: The experience of low socioeconomic position in childhood may increase risk for adult cardiovascular disease above and beyond the effects of current socioeconomic position. One limitation of most previous research is that childhood socioeconomic position was assessed retrospectively. METHODS: Measures of ambulatory blood pressure, heart rate, and heart rate ...
Muiesan Maria Lorenza - - 2013
Cardiovascular (CV) complications such as myocardial infarction, heart failure, stroke and renal failure are related to both the degree and the duration of blood pressure (BP) increase. Resistant hypertension (RH) is associated with a higher risk of CV complications and a higher prevalence of target organ damage (TOD). The relationship ...
Schmeisser Alexander - - 2013
Pulmonary hypertension (PH) due to left heart disease is classified as group II according to the Dana Point classification, which includes left ventricular systolic and/or diastolic left heart failure, and left-sided valvular disease. PH due to left heart disease is the most common cause and when present, especially with right ...
Brown Daniel K - - 2013
A randomized cross-over study explored whether viewing different scenes prior to a stressor altered autonomic function during the recovery from the stressor. The two scenes were a) nature (composed of trees, grass, fields) or b) built (composed of man-made, urban scenes lacking natural characteristics) environments. Autonomic function was assessed using ...
Alam Mahboob - - 2013
The acute impact of hypertensive crisis, and changes after treatment, on left ventricular (LV) systolic and diastolic function using comprehensive echocardiography, including speckle tracking, has not been well characterized. Thirty consecutive patients admitted to the hospital from the emergency room with hypertensive crisis underwent Doppler echocardiography at baseline and after ...
Linz Dominik - - 2013
INTRODUCTION: This study was designed to compare the effect of electrical baroreflex stimulation (BRS) at an intensity used in hypertensive patients and renal denervation (RDN) on atrial electrophysiology. BRS and RDN reduce blood pressure and global sympathetic drive in patients with resistant hypertension. Whereas RDN decreases sympathetic renal afferent nerve ...
Larsson Gunilla - - 2013
The aim of this study was to investigate orthostatic reactions in females with Rett syndrome (RTT), and also whether the severity of the syndrome had an impact on autonomic reactions. Based on signs of impaired function of the central autonomic system found in RTT, it could be suspected that orthostatic ...
Pu Min - - 2013
BACKGROUND: -Mitral regurgitation (MR) produces sympathetic nervous system activation which is detrimental in other causes of heart failure. However, whether β-blockade is beneficial in MR has not been determined. METHODS AND RESULTS: -Eighty-seven rats with significant organic MR were randomized to the β-blockade group (n=43) or the control group (n=44). ...
Andersen Asger - - 2013
BACKGROUND:: We investigated if soluble guanylate cyclase stimulation either alone or in combination with PDE5 inhibition could prevent pressure overload induced right ventricular hypertrophy and failure. METHODS AND RESULTS:: The soluble guanylate cyclase stimulator BAY 41-2272 (BAY, 10 mg/kg/day) either alone or in combination (BAY+SIL) with a PDE5 inhibitor sildenafil ...
Kako Hiromi - - 2013
BACKGROUND: During perioperative care, the continuous measurement of blood pressure (BP) provides superior physiologic monitoring to intermittent techniques. However, such monitoring requires placement of an intraarterial catheter, which may be time-consuming or associated with adverse events and technical difficulty. A noninvasive, continuous BP monitoring device has been studied in the ...
Joffe Samuel W - - 2013
Hypertension is a major risk factor in the development of heart failure (HF), yet current guidelines do not specify a target blood pressure (BP) for patients with established systolic or diastolic left ventricular (LV) dysfunction. While no randomized controlled trial (RCT) has been conducted to specify the optimal blood pressure ...
Możdżan Monika - - 2013
Long-lasting arterial hypertension causes left ventricular hypertrophy (LVH) and impairs left ventricular diastolic function. Our aim was to compare echocardiographic parameters between hypertensive patients defined as dippers and non-dippers during ambulatory blood pressure (BP) monitoring. We analysed 61 consecutive subjects with treated hypertension undergoing 24-h BP monitoring and transthoracic echocardiographic ...
Kallem Radhakrishna R - - 2013
There are limited data in the literature comparing two simultaneously worn ambulatory blood pressure (BP) monitoring (ABPM) devices. The authors compared BPs from two monitors (Mobil-O-Graph [I.E.M., Stolberg, Germany] and Spacelabs 90207 [Spacelabs Medical, Issequah, WA]). In the nonrandomized component of the study, simultaneous 8-hour BP and heart rate data ...
Toischer Karl K Abt. Kardiologie und Pneumologie/Herzzentrum, Georg-August-Universität Göttingen, - - 2013
The aim of the study was to determine the characteristics of the late Na current (INaL) and its arrhythmogenic potential in the progression of pressure-induced heart disease. Transverse aortic constriction (TAC) was used to induce pressure overload in mice. After one week the hearts developed isolated hypertrophy with preserved systolic ...
Murphy Olive H - - 2013
In this paper, the development of a fully implantable wireless sensor able to provide continuous real-time accurate pressure measurements is presented. Surface Acoustic Wave (SAW) technology was used to deposit resonators on crystalline quartz wafers; the wafers were then assembled to produce a pressure sensitive device. Excitation and reading via ...
Watanabe Takatomo - - 2013
We assessed the hypothesis that blood pressure (BP)-lowering therapy has a beneficial effect on left atrial (LA) structure and function and may decrease the incidence of new-onset atrial fibrillation (AF) in elderly patients with hypertension (HTN). We divided 234 subjects 65 years old into four groups based on mean office ...
Patel Vaibhav B - - 2013
Rationale: The classical phagocyte NADPH oxidase (gp91(phox) or Nox2) is expressed in the heart. Nox2 activation requires membrane translocation of the p47(phox) subunit and is linked to heart failure. We hypothesized that loss of p47(phox) subunit will result in decreased ROS production and resistance to heart failure. Objective: To define ...
Yamauchi Hiroyuki - - 2013
The occurrence of heart failure (HF) and its clinical features after a great disaster have not been rigorously examined. We retrospectively examined the effect of the Great East Japan Earthquake on the occurrence of decompensated HF. The number of patients admitted for treatment of decompensated HF and their clinical features ...
Wilcox Susan R - - 2013
An athletic 21 year old male was admitted to the Surgical ICU after sustaining 2 stab wounds to his torso. He had an episode of left lung collapse early in his course, managed with suctioning and increased positive end-expiratory pressure (PEEP) to 15cm H2O. He was bradycardic with heart rates ...
Pourshanazari Aliasghar - - 2013
To investigate the effect of estrogen exerted through the autonomic system in the nucleus tractus solitarii (NTS) on increasing the sensitivity of the baroreflex under conditions of acute hypertension in ovariectomized rats. In this experimental study, conducted in Kerman University of Medical Sciences, Kerman, Iran from March 2010 to October ...
McKeegan D E F - - 2013
In low atmospheric pressure stunning (LAPS), poultry are rendered unconscious before slaughter by gradually reducing oxygen tension in the atmosphere to achieve a progressive anoxia. The effects of LAPS are not instantaneous, so there are legitimate welfare concerns around the experience of birds before loss of consciousness. Using self-contained telemetry ...
Chapman Carrie B - - 2013
Guidelines for assessing diastolic function by echocardiography are continually being updated. Our ability to use available guidelines effectively has not been completely investigated. Six trained echocardiographers were asked to interpret 105 echocardiograms using current American Society of Echocardiography (ASE) algorithms for interpretation of diastolic grade and estimation of left atrial ...
Jung Da-Jung DJ Department of Microbial Engineering, College of Engineering, Konkuk University, Seoul, - - 2013
Although the Ylang-Ylang aroma (YYA) has used as a general method for enhancing sedative effect, there was a little report on the efficacy of YYA on heart function using the electrocardiogram (EKG). Therefore, identifying of the effects of YYA on blood pressure (BP) and heart rate (HR) is important in ...
Liang Peng P Peng Liang, MD, Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, China - - 2013
A 42-year-old woman, who presented with DCM (American Society of Anesthesia, ASA class IV), suffered from gallstone for years, and was scheduled for laparoscopic cholecystectomy. Echocardiography demonstrated a severely dilated left ventricle with global hypokinesia and reduction of left ventricular systolic function, ejection fraction (EF) 34% with mild mitral regurgitation ...
Maier Lars S LS Department of Cardiology and Pneumology, Georg-August-University, Göttingen, Germany. Electronic address: - - 2013
This study investigated whether inhibiting late Na(+) current by using ranolazine improved diastolic function in patients with heart failure with preserved ejection fraction (HFpEF). HFpEF accounts for >50% of all HF patients, but no specific treatment exists. The RALI-DHF (RAnoLazIne for the Treatment of Diastolic Heart Failure) study was a ...
Harman Jane J Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, Bethesda, MD 20892-7936, USA. - - 2013
Hypertension treatment regimens used by African American adults in the Jackson Heart Study were evaluated at the first two clinical examinations (2415 treated hypertensive persons at examination I [exam I], 2000-2004; 2577 at examination II [exam II], 2005-2008). Blood pressure (BP) was below 140/90 mm Hg for 66% and 70% ...
Spaska G - - 2013
Cross-correlation analysis's data indicate for the patients with reactive arthritis features, which determine character the left ventricle's diastolic filling, are end-diastolic pressure and end-diastolic pressure/end-diastolic volume index in the left ventricle.
Haushofer Marcus M Department of Cardiothoracic and Vascular Surgery, RWTH Aachen University Hospital, Aachen, Germany. - - 2013
Right ventricular failure is often the final phase in acute and chronic respiratory failure. We combined right ventricular unloading with extracorporeal oxygenation in a new atrio-atrial extracorporeal membrane oxygenation (ECMO). Eleven sheep (65 kg) were cannulated by a 28-Fr inflow cannula to the right atrium and a 25-Fr outflow cannula ...
Sweitzer Nancy K NK Division of Cardiovascular Medicine, University of Wisconsin, Madison, Wisconsin, USA. - - 2013
Changes in the cardiovascular system with age may predispose older persons to development of heart failure with preserved ejection fraction. Vascular stiffening, aortic pressure augmentation, and ventricular-vascular coupling have been implicated. We explored the potential for acute reductions in late systolic pressure augmentation to impact left ventricular relaxation in older ...
Olsén L - - 2013
The pharmacokinetics and effects of the opioid methadone on behaviour, arterial blood pressure, heart rate and haematocrit were studied in goats. Two goats received methadone (0.2mg/kg) intravenously and the terminal half-life was 88 and 91min, the volume of distribution 8.4 and 6.1L/kg, and clearance 86 and 123mL/min/kg. In a crossover ...
Can Mehmet Mustafa - - 2013
OBJECTIVE: Pulmonary embolism (PE) and severe pulmonary stenosis (PS) are two distinct conditions accompanied by increased pressure load of the right ventricle (RV). Despite major advances in our understanding of the mechanisms of RV adaptation to the increased pressure, substantial gaps in our knowledge remain unsettled. One of much less ...
Miyoshi Hirokazu - - 2013
Our aim was to investigate the relationships between left atrial (LA) structural and functional changes and left ventricular (LV) dysfunction related to LV pressure overload in asymptomatic patients with hypertension. One hundred and twenty-six asymptomatic patients with hypertension and LV ejection fraction (EF) ≥60% were studied. Conventional, pulsed and tissue Doppler, ...
Spevack Daniel M - - 2013
The left ventricular end-diastolic pressure-volume relationship (LV-EDPVR) is a measure of LV distensibility, conveying the size the LV will assume at a given LV end-diastolic pressure (LV-EDP). Measurement of LV-EDPVR requires invasive testing with specialized equipment. Echocardiography can be used to measure LV end-diastolic volume (EDV) and to grossly estimate ...
Agoston-Coldea Lucia - - 2013
Left atrium remodeling is a physiological response to pressure overload in hypertensive patients. The aim of this study is to determine the relationship between left atrium remodeling and left ventricle diastolic dysfunction in hypertensive patients with preserved systolic function. Materials and Methods We conducted a prospective study on 96 hypertensive ...
Reiter Michael J - - 2013
BACKGROUND: -The implantation of a combination hemodynamic monitor-cardioverter-defibrillator in the REDUCEhf study allowed assessment of the relationship between daily intracardiac pressure and occurrence of ventricular arrhythmic (VT/VF) events. METHODS AND RESULTS: -Median estimated pulmonary artery diastolic pressures (ePAD) were calculated every 24 hours in 378 subjects with New York Heart ...
De Lazzari Claudio - - 2013
In silico modeling of the cardiovascular system (CVS) can help both in understanding pharmacological or pathophysiological process and in providing information which could not be obtained by means of traditional clinical research methods due to practical or ethical reasons. In this work the numerical CVS was used to study the ...
Sato Ryo - - 2013
OBJECTIVE:: The sympathetic nervous system plays an important role in blood pressure regulation even in the early stages of chronic kidney disease (CKD). METHODS:: To understand the role of the sympathetic system, we examined the relationship between day/night ratios of both heart rate (HR) and mean arterial pressure (MAP) as ...
Seibert Eric - - 2013
Background/Aims: Dry weight estimation in hemodialysis patients is still a substantial problem. Despite meticulous clinical assessment, fluid overload is common, leading to hypertension and left ventricular hypertrophy (LVH). Segmental calf bioimpedance spectroscopy (cBIS) is a novel tool for dry weight assessment. Here we tested the hypothesis, that its clinical routine ...
Burchell Amy E - - 2013
Heart failure is increasing in prevalence around the world, with hospitalization and re-hospitalization as a result of acute decompensated heart failure (ADHF) presenting a huge social and economic burden. The mechanism for this decompensation is not clear. Whilst in some cases it is due to volume expansion, over half of ...
Moor Matthias B - - 2013
Hemodynamic effects related to changes in serum ionized calcium (iCa) are difficult to determine during conventional hemodialysis (HD) using a fixed dialysate concentration of calcium. Regional citrate anticoagulation (RCA) allows the study of the effects of predefined iCa changes on arterial stiffness and blood pressure (BP) during a single dialysis ...
Di Bello Vitantonio - - 2013
BACKGROUND: In recent years, right ventricular (RV) function has acquired greater relevance as a clinical and prognostic marker in many physiopathological conditions. The study aims to point out the value of real time three-dimensional echocardiography (RT3DE) and tissue Doppler imaging (TDI) in the evaluation of patients affected by pulmonary hypertension ...
Albarwani S - - 2013
The aim of this work was to investigate the effect of ten-weeks lisinopril treatment to spontaneously hypertensive rats (SHRs) on day/night variations of blood pressure, heart rate and autonomic cardio-regulation parameters. Male SHR with surgically implanted radio-telemetry implant that provided direct measurements of arterial pressure and electrocardiogram wave were used. ...
Wiesel Joseph - - 2013
Asymptomatic atrial fibrillation (AF) is a common cause of strokes. Physician screening for AF has been recommended. Home screening for AF may increase the likelihood of detecting asymptomatic AF in patients at risk for stroke because of AF. The aim of this study was to assess the feasibility and accuracy ...
Young Andrew - - 2013
OBJECTIVES: Hybrid palliation for hypoplastic left heart syndrome (HLHS) is associated with mortality and late ventricular dysfunction. Increased ventricular workload and coronary perfusion limitation may be the important factors. Using mathematical modelling, this study investigated the effects of differing hybrid configurations on the demands on this single ventricle circulation. METHODS: ...
Tadic Marijana - - 2013
The aim of this study was to investigate the impact of nondipping arterial blood pressure pattern and the metabolic syndrome (MS), as well as their interaction, on left ventricular (LV) structural and function remodeling. The study included 352 never-treated hypertensive patients with and without MS. Nondipping pattern and MS, separately, ...
Li Zhao-Feng - - 2013
N-terminal pro-brain natriuretic peptide (NT-proBNP), a pro-hormone secreted by the myocardium in response to various stimuli, was found to be correlated with several hemodynamic parameters in pulmonary hypertension associated with systemic sclerosis. We investigated plasma NT-proBNP levels and the relationships between NT-proBNP and several hemodynamic parameters in atrial septal defect ...
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