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Results 351 - 400 of 2397
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Beylin Marie E - - 2013
The 2010 AHA Guidelines for Post-Cardiac Arrest Care recommend immediate treatment of hypotension to maintain adequate tissue perfusion with a goal of mean arterial pressure (MAP) of ≥65 mmHg. However, no studies exist examining the relationship between early hemodynamic goals and outcomes in post-cardiac arrest syndrome (PCAS) patients undergoing therapeutic hypothermia ...
Derosa Giuseppe - - 2013
hypertension affects nearly 1 in 3 adults in the United States, and it is an important modifiable risk factor for coronary artery disease, heart failure, renal failure, and stroke. The aim of this study was to evaluate the effects of a fixed-dose olmesartan/amlodipine combination on blood pressure control, lipid profile, ...
Savaser Davut J DJ Department of Emergency Medicine, University of California, San Diego School of Medicine, San Diego, CA, - - 2013
The prone maximal restraint (PMR) position has been used by law enforcement and emergency care personnel to restrain acutely combative or agitated individual. The position places the subject prone with wrists handcuffed behind the back and secured to the ankles. Prior work has indicated a reduction in inferior vena cava ...
Barile Luigi - - 2013
The authors measured cardiac index in unstable patients after cardiac surgery with the Pressure Recording Analytic Method (PRAM) and compared it with the reference method of thermodilution (ThD) with the pulmonary artery catheter; using the hypothesis that there were no significant differences between the 2 methods. A prospective study. Cardiac ...
Redfors Bjorn - - 2013
Sedating animals is sometimes necessary in experimental research. This paper presents and discusses the influence of four of the most common anesthetic agents on cardiovascular parameters in rats. We also studied the influence of body temperature. Ten-week-old Sprague-Dawley rats were anesthetized with either isoflurane, pentobarbital, ketamine/xylazine or tiletamine/zolazepam (n = 12 in ...
Valenzuela-Alcaraz Brenda - - 2013
Assisted reproductive technologies (ART) have shown to be associated with general vascular dysfunction in late childhood. However it is unknown whether cardiac remodeling is also present and if these changes already manifest in prenatal life. Our aim was to assess fetal and infant (6 months of age) cardiovascular function in ...
Sharkey Leslie C - - 2013
Life threatening complications from chemotherapy occur frequently in cancer survivors, however little is known about genetic risk factors. We treated male normotensive rats (WKY) and strains with hypertension (SHR) and hypertension with cardiomyopathy (SHHF) with 8 weekly doses of doxorubicin (DOX) followed by 12weeks of observation to test the hypothesis ...
Duschek Stefan - - 2013
The baroreflex consists of a negative feedback loop adjusting heart activity to blood pressure fluctuations. This review is concerned with interactions between baroreflex function and behavior. In addition to changes in baroreflex cardiac control subject to behavioral manipulations, interindividual differences in reflex function predicted psychological and central nervous features. The ...
Armstrong David W J - - 2013
To determine the effect of gestational hypertension on the developmental origins of blood pressure (BP), altered kidney gene expression, salt-sensitivity and cardiac hypertrophy (CH) in adult offspring. Female mice lacking atrial natriuretic peptide (ANP-/-) were used as a model of gestational hypertension. Heterozygous ANP+/- offspring were bred from crossing either ...
Liska Frantisek - - 2013
The spontaneously hypertensive rat (SHR) is the most widely used model of essential hypertension and is susceptible to left ventricular hypertrophy (LVH) and myocardial fibrosis. Recently, a quantitative trait locus (QTL) that influences heart interstitial fibrosis was mapped to chromosome 8. Our aim was to dissect the genetic basis of ...
Semenza Gregg L - - 2013
Cardiac function is required for blood circulation and systemic oxygen delivery. However, the heart has intrinsic oxygen demands that must be met to maintain effective contractility. Hypoxia-inducible factor 1 (HIF-1) is a transcription factor that is a master regulator of oxygen homeostasis in all metazoan species. HIF-1 controls oxygen delivery, ...
Lee Ji Yeon - - 2013
Continuous noninvasive cardiac output monitoring (NICOM) is a clinically useful tool in the pediatric setting. This study compared the ability of stroke volume variation (SVV) measured by NICOM with that of respiratory variations in the velocity of aortic blood flow (‚Ė≥Vpeak) and central venous pressure (CVP) to predict of fluid ...
Zuern Christine S CS Abteilung Innere Medizin III, Department of Cardiology, Eberhard-Karls-Universität Tübingen, Tübingen, - - 2013
This study sought to evaluate cardiac baroreflex sensitivity (BRS) as a predictor of response to renal sympathetic denervation (RDN). Catheter-based RDN is a novel treatment option for patients with resistant arterial hypertension. It is assumed that RDN reduces efferent renal and central sympathetic activity. Fifty patients (age 60.3 ± 13.8 ...
Friesen Robert H RH Department of Anesthesiology, Children's Hospital Colorado, University of Colorado, 13123 E. 16th Ave., Aurora, CO 80045. - - 2013
Dexmedetomidine, an α-2 receptor agonist, is widely used in children with cardiac disease. Significant hemodynamic responses, including systemic and pulmonary vasoconstriction, have been reported after dexmedetomidine administration. Our primary goal of this prospective, observational study was to quantify the effects of dexmedetomidine initial loading doses on mean pulmonary artery pressure ...
Williams Nakeya D - - 2013
Short-term cardiovascular responses to head-up tilt (HUT) involve complex cardiovascular regulation in order to maintain blood pressure at homoeostatic levels. This manuscript presents a patient-specific model that uses heart rate as an input to fit the dynamic changes in arterial blood pressure data during HUT. The model contains five compartments ...
Mena Luis J - - 2013
Average real variability (ARV) is a recently proposed index for short-term blood pressure (BP) variability. We aimed to determine the minimum number of BP readings required to compute ARV without loss of prognostic information. ARV was calculated from a discovery dataset that included 24-hour ambulatory BP measurements for 1,254 residents ...
Erces Dániel - - 2013
Cardiogenic shock often leads to splanchnic macro- and microcirculatory complications, and these events are linked to local and systemic inflammatory activation. Our aim was to investigate the consequences of complement C5a antagonist treatment on the early circulatory and inflammatory changes in a clinically relevant large animal model of cardiac tamponade. ...
Bighamian Ramin - - 2013
This paper presents a new analytic tool for automated control of vasopressor infusion, which uses measured changes in blood pressure to infer changes in the underlying cardiovascular system and then estimate dose-response relationships for the underlying cardinal cardiovascular parameters, i.e., those related to cardiac output and total peripheral resistance. Ultimately, ...
Iliescu Radu R Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, - - 2013
The sensitivity of baroreflex control of heart rate is depressed in subjects with obesity hypertension, which increases the risk for cardiac arrhythmias. The mechanisms are not fully known, and there are no therapies to improve this dysfunction. To determine the cardiovascular dynamic effects of progressive increases in body weight leading ...
Ferro Lopes Patrícia C - - 2013
To evaluate the influence of different inspired oxygen fractions (FiO2 ) on pulmonary oxygen exchange and Tei-index of myocardial performance in propofol-anesthetized dogs. Prospective crossover, randomized, experimental trial. Eight adult dogs weighing 8.6 ± 1.8 kg. The animals were anesthetized on five occasions, receiving either an FiO2  = 1.0 (F100), 0.8 (F80), 0.6 (F60), ...
Coelho-Filho Otavio R - - 2013
Cardiomyocyte hypertrophy is a critical precursor to the development of heart failure. Methods to phenotype cellular hypertrophy non-invasively are limited. The goal was to validate a CMR-based approach for the combined assessment of extracellular matrix expansion and cardiomyocyte hypertrophy. Two murine models of a) hypertension (N=18, with N=15 controls) induced ...
Mazza A - - 2013
Aim: Longitudinal study aimed to evaluate the antihypertensive efficacy, safety and the effect on cardiac damage of Aliskiren, administered to a group of high-risk hypertensive patients with mild impairment of renal function and uncontrolled blood pressure (BP) despite a two-drug antihypertensive treatment. Methods: One hundred and six patients (56 men ...
Puyana Juan Carlos - - 2013
We assessed the ability of a normalized autonomic nervous system (ANS) stress measure defined as an increase in the percentage of pulse rate from a baseline homeostasis state to identify corresponding changes in circulating blood volume to quantitatively recognize hypovolemia and predict subsequent autoregulatory exhaustion. Autoregulatory exhaustion is defined as ...
Fettiplace Michael R MR University of Illinois College of Medicine, Chicago, IL, USA. - - 2013
Bolus infusion of lipid emulsion can reverse cardiac pharmacotoxicity caused by local anesthetics and other lipophilic drugs. The mechanisms of this effect are not completely elucidated. The authors test the hypothesis that lipid emulsion infusion exerts direct, positive inotropic effects. Prospective, randomized animal study. University research laboratory. Adult male Sprague-Dawley ...
Jessup Jewell A JA Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC 27157-1009, - - 2013
mRen2.Lewis rats exhibit exacerbated increases in blood pressure, left ventricular (LV) remodeling, and diastolic impairment after the loss of estrogens. In this same model, depletion of estrogens has marked effects on the cardiac biopterin profile concomitant with suppressed nitric oxide release. With respect to the establishment of overt systolic hypertension ...
Schafer Kristin - - 2013
Shock index (SI), the ratio of heart rate (HR) to systolic arterial pressure (SAP), is a metric often used to diagnose patients at risk of impending cardiovascular instability and hemorrhagic shock. We hypothesized that if SI reflected impending cardiovascular instability and shock in an individual, then: (1) elevations in SI ...
Lundemoen Steinar - - 2013
To evaluate how pulsed versus nonpulsed cardiopulmonary bypass influences microvascular fluid exchange in an experimental setup combining a nonpulsatile perfusion pump and an intra-aortic balloon pump. A total of 16 pigs were randomized to pulsatile cardiopulmonary bypass perfusion with an intra-aortic balloon pump switched to an automatic 80 beats/min mode ...
Kristensen Kasper Kyhl - - 2013
Objective Positive pressure ventilation (PPV) is widely used for treatment of acute car-dio-respiratory failure, occasionally at the expense of compromised cardiac function and arterial blood pressure. The explanation why has largely rested on interpretation of in-tracardiac pressure changes. We evaluated the effect of PPV on the central circulation by studying ...
Russo Christopher - - 2013
Abstract Background: The diagnosis of cardiac amyloidosis often requires a right heart catheterization with an endomyocardial biopsy. Although the central hemodynamics of the three main types of cardiac amyloidosis (AL, ATTRm, ATTRwt) have previously been described, the prognostic significance of these variables have not been fully explored. Objective: To compare ...
Prasad Kailash - - 2013
The pathophysiology of endotoxic shock is complex. This review emphasizes the role of reactive oxygen species (ROS) in the pathophysiology of endotoxic shock and the effectiveness of flaxseed in amelioration of the deleterious effects of endotoxic shock on the cardiovascular function and health of the tissue. Endotoxic shock is associated ...
Seiler Christian - - 2013
To expand the limited information on the prognostic impact of quantitatively obtained collateral function in patients with coronary artery disease (CAD) and to estimate causality of such a relation. Prospective cohort study with long-term observation of clinical outcome. University Hospital. One thousand one hundred and eighty-one patients with chronic stable ...
Jahren Silje E - - 2013
The clinical importance of pulsatility is a recurring topic of debate in mechanical circulatory support. Lack of pulsatility has been identified as a possible factor responsible for adverse events and has also demonstrated a role in myocardial perfusion and cardiac recovery. A commonly used method for restoring pulsatility with rotodynamic ...
Friess Stuart H - - 2013
During cardiopulmonary resuscitation, adequate coronary perfusion pressure is essential for establishing return of spontaneous circulation. Current American Heart Association guidelines recommend standardized interval administration of epinephrine for patients in cardiac arrest. The objective of this study was to compare short-term survival using a hemodynamic directed resuscitation strategy versus chest compression ...
Trummer G - - 2013
Sudden cardiac arrest is one of the leading causes of death. Conventional CPR techniques after cardiac arrest provide circulation with reduced and varying blood flow and pressure. We hypothesize that using pressure- and flow-controlled reperfusion of the whole body improves neurological recovery and survival after 15 min of normothermic cardiac ...
Chang Yu-Wang YW Molecular Medicine Program, Taiwan International Graduate Program, Institute of Biomedical Sciences, Academia Sinica, Taipei 115, - - 2013
Pressure-overload stress to the heart causes pathological cardiac hypertrophy, which increases the risk of cardiac morbidity and mortality. However, the detailed signaling pathways induced by pressure overload remain unclear. Here we used phosphoproteomics to delineate signaling pathways in the myocardium responding to acute pressure overload and chronic hypertrophy in mice. ...
Natalini Giuseppe - - 2013
The beneficial effect of low tidal volume (TV) ventilation strategy on mortality in patients with acute respiratory distress syndrome (ARDS) has been attributed to the protective effect on ventilator-induced lung injury, and yet its effect on cardiovascular function might also play an important role. The aim of this study was ...
Gademan Maaike G J - - 2013
Adverse intrauterine conditions can program hypertension. Because one of the underlying mechanisms is thought to be cardiac autonomic balance, we investigated the association between prepregnancy body mass index (BMI) and blood pressure and indicators of the autonomic balance in the child at age 5 to 6 years. Also investigated was ...
Carll Alex P AP * Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina - - 2013
Cardiac disease exacerbation is associated with short-term exposure to vehicular emissions. Diesel exhaust (DE) might impair cardiac performance in part through perturbing efferent sympathetic and parasympathetic autonomic nervous system (ANS) input to the heart. We hypothesized that acute changes in ANS balance mediate decreased cardiac performance upon DE inhalation. Young ...
Glatz Andrew C - - 2013
Force due to leaning during cardiopulmonary resuscitation (CPR) negatively affects haemodynamics and intrathoracic airway pressures (ITP) in animal models and adults, but has not been studied in children. We sought to characterize the effects of sternal force (SF) comparable to leaning force on haemodynamics and ITP in anaesthetized children. Children ...
Schulz Steffen - - 2013
Besides the well-known cardiac risk factors for schizophrenia, increasing concerns have been raised regarding the cardiac side-effects of antipsychotic medications. A bivariate analysis of autonomic regulation, based on cardiovascular coupling, can provide additional information about heart rate (HR) and blood pressure regulatory patterns within the complex interactions of the cardiovascular ...
Shields Denise L - - 2013
Blood pressure (BP) control is central to health promotion and maintenance across the health care continuum. Optimal control has been associated with improved microvascular end organ outcomes, reduced morbidity and mortality, and improved quality of life. Calcium channel blockers (CCBs) are a frequently utilized first-line antihypertensive agent, either as a ...
Escoubet Brigitte - - 2013
-High plasma aldosterone (aldo) has deleterious cardiovascular effects which are independent of blood pressure (BP), but the role of the mineralocorticoid receptor (MR) remains unclear. Renal pseudohypoaldosteronism type 1 (PHA1) is a rare autosomal dominant disease caused by NR3C2 loss-of-function mutations which is characterized by renal salt loss and compensatory ...
Menke Jan - - 2013
Near-infrared spectroscopy (NIRS) can monitor changes in cerebral regional oxygen saturation (rSO2) and tissue hemoglobin content (HbT). The relation between cerebral NIRS readings and vital parameters has not been analyzed before at a fine temporal scale. This study analyzed this relation during cardiopulmonary bypass (CPB) surgery in 10 children (0-9 years, ...
Yu Ting-Ting - - 2013
XinJiErKang (XJEK), a Chinese herbal formula, is identified as an effective preparation to treat coronary heart disease and myocarditis. The aim of the study is to investigate the anti-hypertensive effects of XJEK by oral administration and also to find out whether the drug has any role in oxidative stress and ...
Vass A - - 2013
Background/Purpose: Cardiac tamponade is a medical emergency situation associated with a high rate of life-threatening complications, even after immediate interventions. Our aim was to characterize the acute inflammatory consequences of this event in a clinically relevant large animal model. Methods: Cardiac tamponade was induced for 60 min in anesthetized, ventilated ...
Sutendra Gopinath - - 2013
Right ventricular (RV) failure is an important clinical problem with no available therapies, largely because its molecular mechanisms are unknown. Mitochondrial remodeling resulting to a metabolic shift toward glycolysis has been described in RV hypertrophy (RVH), but it is unknown whether this is beneficial or detrimental. While clinically RV failure ...
Kakkavas Apostolos - - 2013
The authors investigated whether erectile dysfunction (ED) in the early stages of hypertension is associated with heightened end-organ damage. A total of 174 consecutive men with untreated, newly diagnosed essential hypertension (aged 50.3 years, office blood pressure [BP] 150/98 mm Hg) were studied. All participants underwent 24-hour ambulatory BP monitoring, blood examination, albumin-creatinine ...
Hultström Michael - - 2013
Haemorrhagic shock is a common cause of acute kidney injury, which is a major risk factor for developing chronic kidney disease. The mechanism is superficially straightforward. An arterial pressure below the kidney's autoregulatory region leads to a direct reduction in filtration pressure and perfusion, which in turn cause renal failure ...
Nilsson Lena M - - 2013
The pulse oximeter measurement pleth variability index (PVI) can detect hypovolaemia during positive pressure ventilation. We studied whether PVI can detect a hypovolaemic state in spontaneously breathing humans and whether better discrimination is obtained by modifying the breathing patterns. Experimental study. Clinical physiology department in a university hospital. Fourteen healthy ...
Boly C A CA Department of Anaesthesiology - - 2013
Left-ventricular end-systolic elastance (Ees) is an index of cardiac contractility, but the invasive nature of its assessment has limited perioperative application. We explored the feasibility of a minimally invasive method of Ees estimation for perioperative assessment of cardiac function and evaluated the suitability of phenylephrine as a loading intervention. In ...
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