Search Results
Results 301 - 350 of 1680
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Gupta Samir - - 2013
Controversy surrounds the assessment of perfusion and the methods currently utilised to define hypotension, especially blood pressure. There is growing agreement to assess heart function when selecting inotropic therapy and use bedside tools such as echocardiography for assessing at-risk infants. Both dopamine and dobutamine have comparative efficacy, and in certain ...
Beigel Roy - - 2013
When the right atrial pressure (RAP) exceeds the left atrial pressure, right-to-left shunting can occur. Normally, the Valsalva maneuver is used to facilitate elevation of RAP. However, performing the Valsalva maneuver can be problematic in certain situations. The aim of this study was to test the hypothesis that the application ...
Guazzi M - - 2013
Cardiorenal syndrome (CRS) is defined as an interaction of cardiac disease with renal dysfunction that leads to diuretic resistance and renal function worsening, mainly with heart failure (HF) exacerbation. Hemodynamic variables linking heart and kidney are renal blood flow (cardiac output) and perfusion pressure, i.e., the aortic - renal venous ...
Studinger Péter - - 2013
In this prospective, open-label, randomized, controlled clinical trial the effects of low-dose carvedilol, nebivolol, and metoprolol on central arterial pressure and augmentation index (AIx) and its heart rate-corrected value (AIx@75) were assessed. The authors randomized 75 hypertensive patients (18-70 years) to carvedilol 12.5/25 mg, metoprolol 50/100 mg, or nebivolol 2.5/5 mg daily and followed ...
Barst Robyn J - - 2013
Uncorrected congenital heart disease (CHD) frequently leads to pulmonary arterial hypertension (PAH), the most severe form of which is Eisenmenger syndrome (ES). We compared patients with idiopathic or heritable PAH (IPAH or HPAH; n = 1,626) against those with CHD-associated PAH (n = 353) who were enrolled in the Registry to Evaluate ...
Ennezat Pierre Vladimir - - 2013
Pulmonary hypertension (PH) is prevalent in decompensated heart failure with preserved ejection fraction (HFpEF). We investigated the effect of a return to a compensated state on pulmonary artery systolic pressure (PASP) and functional mitral regurgitation (FMR). Two-dimensional Doppler echocardiography was prospectively performed before initiation of standard therapy and 48 hours ...
Wang Yong-Ping - - 2013
Paced breathing is a frequently performed technique for cardiovascular autonomic studies. The relative timing of inspiration and expiration during paced breathing, however, is not consistent. We therefore examined whether indexes of heart rate variability and spontaneous baroreflex sensitivity would be affected by the respiratory time ratio that is set. We ...
Monroe Vanessa D - - 2013
Blood pressure lability is a phenomenon in which there is a wide range of extreme highs and lows in blood pressure measurements. These highs and lows occur at irregular intervals, and it is difficult for health care providers to isolate when this phenomenon occurs. Hypertension and hypotension occurring within minutes ...
Nicoara Alina - - 2013
Left ventricular diastolic dysfunction (LVDD) has only recently been recognized as an important determinant of perioperative morbidity. Intraoperative echocardiographers have been slow to adopt assessment of LVDD into clinical practice. This has been partly attributable to the complex measurements required to characterize LVDD, which are in turn related to how ...
Gopal Divya - - 2013
Aims and Objectives: Left internal mammary artery (LIMA) is the preferred arterial conduit for coronary artery bypass grafting. Various pharmacological agents are known to increase LIMA blood flow. Sympathetic blockade mediated by stellate ganglion block (SGB) has been used to provide vasodilatation in the upper extremities and in the treatment ...
Dupont Matthias - - 2013
Awareness has grown in recent years that right ventricular (RV) function is equally important as left ventricular (LV) function in the setting of left-sided heart disease. RV dysfunction can be the consequence of an increased afterload imposed by the failing LV. The concept of "afterload" is physically most correctly described ...
Uzun H - - 2013
This study was designed to analyze the characteristics of adult patients with mad honey intoxication, with special emphasis on its effects on vital signs and blood glucose levels. Patients admitted to the Emergency Department of urban hospital in the Black Sea region of Turkey over the 16-months study period due ...
Kamalov German - - 2013
Cardinal pathologic features of hypertensive heart disease (HHD) include not only hypertrophied cardiomyocytes and foci of scattered microscopic scarring, a footprint of prior necrosis, but also small myocytes ensnared by fibrillar collagen where disuse atrophy with protein degradation would be predicted. Whether atrophic signaling is concordant with the appearance of ...
Huang Cheng-Hsiung - - 2013
Brief pressure overload of the left ventricle reduced myocardial infarct (MI) size in rabbits has been previously reported. Its effects in other species are not known. This study investigates effects of pressure overload and the role of adenosine in rats in this study. MI was induced by 40-minute occlusion of ...
Fujimoto Naoki - - 2013
Hypertension is associated with cardiovascular stiffening and left ventricular diastolic dysfunction, leading to comorbidities such as heart failure with preserved ejection fraction (HFpEF). It is unknown whether sex and hypertension subtype affect haemodynamics and left ventricular function in older individuals. Ninety-five older patients with Stage 1 hypertension (ambulatory awake SBP135-159 mmHg) ...
Manolis Athanasios - - 2013
Atrial fibrillation and arterial hypertension represent two common clinical conditions that frequently coexist, especially in older individuals, and are associated with increased risk of stroke. Antihypertensive therapy reduces the risk of stroke by approximately 40%. It has been observed that stroke rates were reduced by 10% for every 2-mmHg reduction ...
van den Hooven Edith H - - 2013
Early-life nutrition may influence cardiovascular development. Not much is known about the associations between dietary composition and cardiovascular risk factors in childhood. We examined the associations of infant macronutrient intake with cardiovascular structures and function in 2882 children participating in a prospective, population-based cohort study. Information on macronutrient intake at ...
Lampert Brent C - - 2013
Continuous flow (CF) left ventricular assist devices (LVAD) are afterload sensitive and therefore pump performance is affected by hypertension. In addition, poorly controlled hypertension may increase the risk of aortic insufficiency (AI) and stroke. Blood pressure regimens after CF LVAD have not been studied and their impact on rates of ...
Ke Youfu - - 2013
To evaluate the efficacy and safety of wuling powder and modified tianma gouteng decoction as an open add-on therapy for treating essential hypertension (EH). 72 cases of EH patients took wuling powder and modified tianma gouteng decoction for 2 weeks to treat EH without changing their former medication. New York ...
Spießhöfer Jens - - 2013
Using pulse transit time (PTT) and an ECG appears to be a promising alternative for invasive or noninvasive monitoring of blood pressure (BP). This study assessed the validity of PTT for BP monitoring in clinical practice. Twenty-nine patients with chronic heart failure (HF; 27 male, 70.5 ± 9.9 years) and nocturnal Cheyne-Stokes respiration ...
Arbo John E - - 2013
Right atrial pressure (RAP) is considered a surrogate for right ventricular filling pressure or cardiac preload. It is an important parameter for fluid management in patients with septic shock. It is commonly approximated by the central venous pressure (CVP) either invasively using a catheter placed in the superior vena cava ...
Masaki Mitsuru - - 2013
Plasma aldosterone concentration (PAC) is related to cardiac remodeling in patients with hypertension. However, we do not know the detailed relationship between changes in PAC and regression of left atrial (LA) volume following long-term treatment with angiotensin II receptor blocker (ARB) or calcium-channel blocker (CCB). The aim of this study ...
Eliasdottir Sigridur B - - 2013
Limited data exist on the comparison of blood pressure (BP) measurements using aneroid and oscillometric devices. The purpose of the study was to investigate the difference in BP obtained using oscillometric and aneroid BP monitors in 9- to 10-year-old children. A total of 979 children were divided into group O, ...
Fadel Bahaa M - - 2013
Careful analysis of the right-sided Doppler signals provides important data regarding right heart hemodynamics. Here, we illustrate the value of the combined analysis of flow across the hepatic vein, tricuspid valve, and pulmonary valve for the diagnosis of elevated right ventricular end-diastolic pressure.
Schroll Stephan - - 2013
Continuous positive airway pressure (CPAP) has been used to treat patients with chronic heart failure (CHF) and sleep-disordered breathing (SDB). CPAP treatment in severe CHF with concomitant SDB and atrial fibrillation has been linked to impairment of cardiac output (CO) as a potential cause for adverse outcome. The aim of ...
Welch Terrence D - - 2013
The surgical maze procedure is highly effective in treating symptomatic atrial fibrillation but may have detrimental effects on left atrial contractile function and compliance. We describe a series of patients presenting with symptomatic pulmonary hypertension due in part to left atrial dysfunction after surgical maze procedures. This report describes nine ...
Verma Anjali A Demonstrator, Department of Physiology, TMMC & RC , Moradabad, Uttar Pradesh, India - - 2013
Backgrounds and Objectives: Stress-induced increase in heart-rate and blood pressure is termed cardiovascular reactivity (CVR). Various studies are designed to monitor the CVR and use different types of experimental stressors. We have compared the CVR to three different stressors used in CVR based studies (cold pressor task, hand grip test, ...
Kunig H - - 2013
Ejection fractions, derived from ventricular volumes, and double product, related to myocardial oxygen consumption, are important diagnostic parameters, as they describe the efficiency with which oxygen is consumed. Present technology often allows only intermittent determination of physiological status. This deficiency may be overcome if ejection fractions and myocardial oxygen consumption ...
Akgun Taylan - - 2013
Although very high gradient levels were measured during the evaluation of ventricular septal defect (VSD) in daily practice, these measurements are generally interpreted as erroneous and thus neglected. Our aim was to assess the features of VSD's having erroneous interventricular pressure gradients by echocardiography. A 46 patients were enrolled in the study. The ...
Lefkov Sharon - - 2013
Specific respiratory patterns and periodic breathing have been associated with heart failure. Less is known regarding changes in tidal volume (TV) and minute ventilation (MV) as a result of early heart failure (HF) decompensation. Twelve adult Yucatan minipigs were implanted with a biventricular pacemaker and a left ventricular pressure sensor. ...
Birner Christoph - - 2013
Background: Systolic heart failure (HF) is frequently accompanied by diastolic dysfunction and sleep-disordered breathing (SDB). Objectives: The objective of this subset analysis was to determine effect sizes of auto-servo ventilation (ASV and biphasic positive airway pressure ASV) on echocardiographic measures of diastolic function in patients with systolic HF and SDB. ...
Dandel Michael - - 2013
Left ventricular assist devices (LVADs) provide better outcome than biventricular devices, but it is a challenge to predict the impact of LV mechanical unloading on postoperative right ventricular (RV) function preoperatively. We assessed the load dependency in RV performance before and after LVAD implantation aiming to improve preoperative decision making. ...
Kawasaki Tatsuya T Department of Cardiology, Matsushita Memorial Hospital, Osaka, - - 2014
An abnormal blood pressure response to exercise has been reported to be associated with left ventricular subendocardial ischemia in patients with hypertrophic cardiomyopathy (HCM), but the underlying mechanism remains unclear. We report a case of HCM with an abnormal blood pressure response and subendocardial ischemia, in which the analysis of ...
Okada M - - 2013
To evaluate the volumetric values of intrapulmonary clots (IPCs) using 64-section dual-energy perfusion computed tomography (DEpCT). A total of 174 patients suspected of having acute pulmonary embolism (PE) underwent DEpCT, and acute PE was diagnosed in 48 of these patients. DEpCT images were three-dimensionally reconstructed with four threshold ranges: 1-120 HU ...
Savarese Gianluigi - - 2013
Ranolazine (R), as add-on therapy in symptomatic patients with chronic stable coronary artery disease (CAD), has been tested in randomized clinical studies. Aim of the study was to assess in a meta-analysis the effects of R on angina, nitroglycerin consumption, functional capacity, electrocardiographic signs of ischemia and hemodynamic parameters in ...
Borgdorff Marinus A - - 2013
Right ventricular (RV) failure due to increased pressure load causes significant morbidity and mortality in patients with congenital heart diseases and pulmonary arterial hypertension. It is unknown whether renin-angiotensin-aldosterone-system (RAAS) inhibition (the cornerstone of left ventricular failure treatment) is effective in RV failure. We investigated the effects of combination treatment ...
Tadic Marijana - - 2013
The purpose of this investigation was to evaluate right ventricular (RV) and right atrial (RA) function and mechanics in untreated hypertensive patients with different blood pressure (BP) patterns by using two-dimensional (2DE) speckle tracking analyses and three-dimensional echocardiography (3DE). This cross-sectional study included 174 recently diagnosed hypertensive patients. All patients ...
Gladden James D JD University of Alabama at Birmingham (UABComprehensive Cardiovascular Center, UAB Birmingham, - - 2013
Xanthine oxidase (XO) is increased in human and rat left ventricular (LV) myocytes with volume overload (VO) of mitral regurgitation and aortocaval fistula (ACF). In the setting of increased ATP demand, XO-mediated ROS can decrease mitochondrial respiration and contractile function. Thus, we tested the hypothesis that XO inhibition improves cardiomyocyte ...
Gellen Barnabas - - 2013
The ratio of early transmitral blood flow velocity over tissue Doppler early diastolic mitral annulus velocity (E/e') was found unreliable for estimating pulmonary capillary wedge pressure (PCWP) in patients with decompensated systolic heart failure (HF). The objective of this study was to test its reliability in stable HF. Therefore, 130 ...
Mueller Casey A - - 2013
Angiotensin II (ANG II) alters the short-term blood pressure buffering capacity of the baroreflex in many adult animals. In embryonic chickens, high plasma ANG II levels contribute to baseline mean arterial pressure (MAP, kPa) without changing heart rate (ƒH, beats min(-1)). Based on these features we hypothesized an ANG II-induced ...
Ogihara Yoshito - - 2013
We sought to evaluate the potential utility of echocardiography-derived morphological and functional right ventricular (RV) variables for assessing disease severity of pulmonary arterial hypertension (PAH) and determining the changes in the patient's hemodynamics in the clinical course. This study consisted of 24 normal controls (the control group) and 24 patients ...
Kelly Tanika N TN Department of Epidemiology, Tulane University, 1440 Canal St, Suite 2000, New Orleans, LA 70112. - - 2013
We conducted a genome-wide association study meta-analysis of mean arterial pressure and pulse pressure among 26,600 East Asian participants (stage 1) followed by replication study of up to 28,783 participants (stage 2). For novel loci, statistical significance was determined by a P<5.0×10(-8) in joint analysis of stage 1 and stage ...
Selby Van N - - 2013
Acute heart failure is associated with substantial morbidity and mortality. Goals of treatment are decongestion, correction of hemodynamic abnormalities, symptom relief, and reducing long-term morbidity and mortality. Loop diuretics are a first-line agent for treatment of volume overload, with ultrafiltration reserved for those who do not respond to pharmacologic therapy. ...
Steinberg Jonathan S - - 2013
Renal artery denervation (RDN) has been introduced as an ablation procedure that can effectively treat drug-resistant forms of hypertension. The ablative lesions reduce the afferent and efferent sympathetic nerve traffic to and from the kidneys, thus improving blood pressure control. Because of better control of blood pressure, and because the ...
Collins Melissa - - 2013
The purpose of this study was to evaluate the differences between automated and manual blood pressure results in patients with atrial fibrillation. Data collection took place on 3 telemetry units at a 519-bed community hospital. Findings indicate that there are statistically significant differences between automated and manual blood pressures in ...
Pasero D - - 2013
The development of pulmonary hypertension before heart transplantation increases the risk for postoperative right ventricular failure. Reversibility of pulmonary vascular resistance (PVR), which indicates the feasibility of heart transplantation, can be tested with the use of intravenous vasodilators, such as sodium nitroprusside (NaNTP) or prostacyclin. However, the drawback of these ...
Kaygısız Ziya - - 2013
Objectives: Des-Arg9-bradykinin and bradykinin-potentiating peptide C (BPPC) may contribute to the regulation of cardiovascular function. Therefore, we studied effects of these peptides on coronary perfusion pressure (CPP), heart rate, left ventricular developed pressure (LVDP) and maximum rate of increase of left ventricular pressure (+dP/dtmax). Methods: The isolated rat hearts were ...
Marabotti Claudio - - 2013
The magnitude of the oxygen-sparing effect induced by the diving response in humans is still under debate. We wished to compare cardiovascular changes during maximal breath-holding (BH) in air and during whole-body immersion at the surface in a group of BH divers. Twenty-one divers performed a maximal static apnea in ...
Shin Sung-Hee - - 2013
We evaluated the utility of two-dimensional (2D) and three-dimensional (3D) left ventricular (LV) global myocardial deformity parameters for assessing LV diastolic function by comparing invasive measures of LV performance. Echocardiography and LV pressure were assessed in 39 patients. Myocardial LV longitudinal, circumferential, and radial deformations, as well as area strain, ...
Tarvasmäki Tuukka - - 2013
To examine the use of the treatments for acute heart failure (AHF) recommended by ESC guidelines in different clinical presentations and blood pressure groups. The use of intravenous diuretics, nitrates, opioids, inotropes, and vasopressors as well as non-invasive ventilation (NIV) was analysed in 620 patients hospitalized due to AHF. The ...
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