Search Results
Results 401 - 450 of 2928
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Zanotti Cavazzoni Sergio L - - 2010
OBJECTIVES: Myocardial dysfunction in sepsis may be associated with changes in left ventricular (LV) size. The goal of this study was to evaluate the impact of myocardial dysfunction and changes in LV diameter on hemodynamics and survival in a murine model of sepsis. METHODS: C57Bl/6 mice (N = 30) were ...
Farah Maria Cecília Knoll - - 2010
Twenty-three patients (median age 23 months) who underwent Fallot's tetralogy repair were investigated prospectively to detect a possible association between histopathologic myocardial remodeling and echocardiographic findings of systolic or diastolic ventricular dysfunction. Intraoperatively resected infundibular bands and subendocardial biopsy samples from the right ventricle (RV) and left ventricle were obtained ...
Innocenti Francesca - - 2010
We compared left ventricular (LV) remodeling following a first time acute anterior ST-elevation myocardial infarction (aSTEMI) treated with primary coronary intervention (pPCI) in different age groups. A total of 116 patients, 61 aged <65 and 55 aged >or=65 years, who survived after a recent aSTEMI treated with pPCI, underwent dobutamine ...
Bevan Adam K AK Department of Gene Therapy, The Research Institute, Nationwide Children’s Hospital, Columbus, OH 43205, - - 2010
Proximal spinal muscular atrophy (SMA) is a debilitating neurological disease marked by isolated lower motor neuron death and subsequent atrophy of skeletal muscle. Historically, SMA pathology was thought to be limited to lower motor neurons and the skeletal muscles they control, yet there are several reports describing the coincidence of ...
Olivotto Iacopo - - 2010
In hypertrophic cardiomyopathy (HCM), the clinical significance attributable to the broad range of left ventricular (LV) systolic function, assessed as the ejection fraction (EF), is incompletely resolved. We evaluated the EF using cardiovascular magnetic resonance (CMR) imaging in a large cohort of patients with HCM with respect to the clinical ...
Chow Pak-Cheong - - 2011
We tested the hypothesis that diastolic ventricular interaction occurs after atrial switch operation for transposition of the great arteries (TGA) and that subpulmonary LV diastolic function is influenced by septal geometry. Twenty-nine patients (male 19) after atrial switch operation for TGA aged 20.8±4.1years and 27 healthy controls were studied. Two-dimensional ...
Grenacher Patrizia A - - 2010
To study the applicability of anatomical M-mode (AMM) for assessment of left ventricular (LV) size and function in horses, evaluate agreement with conventional M-mode (CMM), determine reliability, and establish reference intervals for AMM measurements. 98 horses; 13.1 +/- 5.6 years; 538 +/- 78 kg. Two-dimensional and M-mode recordings were analyzed ...
Bilge Ahmet Kaya - - 2010
BACKGROUND: Iron-mediated cardiomyopathy is the main cause of death in thalassemia patients. Early detection of cardiac abnormalities is important as aggressive chelation therapy may improve prognosis in these patients. The aim of this study is to evaluate left ventricular (LV) functions by tissue velocity imaging (TVI) and strain imaging (SI) ...
Chockalingam Anand - - 2010
Acute left ventricular (LV) dysfunction is common in the critical care setting and more frequently affects the elderly and patients with comorbidities. Because of increased mortality and the potential for significant improvement with early revascularization, the practitioner must first consider acute coronary syndrome. However, variants of stress (takotsubo) cardiomyopathy may ...
Takamura Takeshi - - 2010
OBJECTIVE: The aim of this study was to noninvasively quantify global left ventricular (LV) contraction and relaxation, and to investigate their relationship in normal, hypertrophic, and failing myocardium. METHODS: Fifty patients with hypertensive LV hypertrophy (LVH) (LVH group), 50 patients with dilated cardiomyopathy (DCM) (DCM group), and 50 normal subjects ...
Zheng Minjuan - - 2010
Loss of synchronous contraction between or within the right and left ventricle (RV, LV) leads to adverse ventricular function. We used real time three-dimensional echocardiography (RT3DE) for evaluation of severity of interventricular dyssynchrony and function in a porcine heart model. Six fresh in vitro porcine hearts were used to create ...
Abdulrahman Randa M - - 2010
BACKGROUND: Subclinical hyperthyroidism is associated with cardiovascular morbidity. Recent advances in echocardiography imaging have allowed sophisticated evaluation of myocardial tissue properties. OBJECTIVE: To investigate the myocardial effects of long-term exogenous subclinical hyperthyroidism using two-dimensional speckle tracking echocardiography imaging (2D-STE). DESIGN: Prospective, single-blinded, placebo-controlled randomized trial of 6 months duration with ...
Wei Sheng S Institute of Molecular Medicine, Peking University, Beijing, - - 2010
The transverse tubule (T-tubule) system is the ultrastructural substrate for excitation-contraction coupling in ventricular myocytes; T-tubule disorganization and loss are linked to decreased contractility in end stage heart failure (HF). We sought to examine (1) whether pathological T-tubule remodeling occurs early in compensated hypertrophy and, if so, how it evolves ...
Yamazaki Katrina Go KG Department of Medicine, University of California, San Diego, La Jolla, California 92093, - - 2010
We examined the effects of the flavanol (-)-epicatechin on short- and long-term infarct size and left ventricular (LV) structure and function after permanent coronary occlusion (PCO) and the potential involvement of the protective protein kinase B (AKT)/extracellular signal-related kinase (ERK) signaling pathways. (-)-epicatechin reduces blood pressure in hypertensive patients and ...
Antoni M Louisa - - 2010
The purpose of the present study was to assess the evolution of left ventricular (LV) function after acute myocardial infarction (AMI) using global longitudinal peak systolic strain (GLPSS) during 1 year follow-up. In addition, patients were divided in groups with early, late, or no improvement of LV function and predictors ...
John Jerry M - - 2010
Most elderly persons with heart failure have a preserved left ventricular (LV) ejection fraction (HFPEF). The pathophysiology of this disorder is not well understood, and there are conflicting data regarding the role of decreased LV distensibility. To assess LV distensibility over a range of preload conditions while minimizing the large, ...
Shudo Yasuhiro - - 2010
The objective of this study was to assess changes in left ventricular (LV) volume, function and regional myocardial wall stress in non-infarcted segments following restrictive mitral annuloplasty (RMA) in patients with ischaemic cardiomyopathy (ICM) and severe functional mitral regurgitation (MR). Twenty-two patients with ICM (ejection fraction <35%) and severe MR ...
Aziz Emad F - - 2010
Heart failure and atrial fibrillation (AFib) are the twin epidemics of modern cardiovascular disease. The incidence of new-onset AFib in acute decompensated heart failure (ADHF) patients is difficult to predict and the short- and long-term outcomes of AFib in a cohort of patients admitted with ADHF are unknown. A total ...
D'Andrea Antonello - - 2010
To analyse right ventricular (RV) myocardial deformation in patients with left ventricular (LV) hypertrophy secondary to either hypertrophic cardiomyopathy (HCM) or athlete's competitive endurance training. Standard Doppler echo, exercise stress echo, and 2D speckle-tracking strain echocardiography (2DSE) of RV longitudinal deformation in RV septal and lateral walls were performed in ...
Jianhui Li - - 2010
Acute myocardial dysfunction is a typical manifestation of septic shock. Experimentally, the administration of endotoxin [lipopolysacharride (LPS)] to laboratory animals is frequently used to study such dysfunction. However, a majority of studies used load-dependent indexes of cardiac function [including ejection fraction (EF) and maximal systolic pressure increment (dP/dt(max))], which do ...
Selby Nicholas M - - 2011
Hemodynamic changes during hemodialysis can precipitate subclinical myocardial ischemia, which over time contributes to the development of cardiac failure and is associated with a poor prognosis. Peritoneal dialysis (PD) is also associated with acute changes in systemic hemodynamics and a similarly high incidence of cardiovascular disease; we therefore sought to ...
Honma Hiroshi - - 2010
Arterial stiffening may contribute to secondary myocardial dysfunction. The aim of this study was to assess the stiffness of the thoracic descending aorta (TDA) by performing strain-rate measurements with transesophageal echocardiography (TEE) and to examine the relation of the findings to left ventricular (LV) function. Eight patients (group I) without ...
Larose Eric - - 2010
The aim of this study was to determine whether a very early imaging strategy improves the prediction of late systolic dysfunction and poor outcomes in ST-segment elevation myocardial infarction (STEMI) compared with traditional predictors. Earlier prediction of poor outcomes after STEMI is desirable, because it will allow tailored therapy at ...
Baggish Aaron L - - 2010
There is significant individual variability in the cardiac adaptation that occurs in response to exercise training. Factors associated with this variability remain incompletely understood. To date, the relationship between the competition level at which athletes participate and their underlying cardiac parameters has not been explored. The purpose of this study ...
Kelly Dominic - - 2010
BACKGROUND: Procalcitonin is involved in the inflammatory response and is associated with adverse prognosis in certain conditions. AIMS: To investigate the association between procalcitonin and major adverse cardiac events (MACE), left ventricular (LV) function and remodelling following acute myocardial infarction (AMI). METHODS: Plasma procalcitonin was measured in 977 patients with ...
Zamilpa Rogelio R Department of Medicine, Division of Cardiology, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229-3900, - - 2010
Matrix metalloproteinase-9 (MMP-9) deletion has been shown to improve remodeling of the left ventricle post-myocardial infarction (MI), but the mechanisms to explain this improvement have not been fully elucidated. MMP-9 has a broad range of in vitro substrates, but relevant in vivo substrates are incompletely defined. Accordingly, we evaluated the ...
Xu X X Cardiovascular Division, Department of Medicine, University of Minnesota, The Center of Vascular Biology, Minneapolis, Minnesota 55455, - - 2010
The nonpurine selective xanthine oxidase (XO) inhibitor febuxostat attenuates development of left ventricular (LV) hypertrophy and dysfunction in mice when treatment is initiated within 1 hour of transverse aortic constriction (TAC). This study investigated whether a 7-day delay of treatment with the XO inhibitors febuxostat or allopurinol would reverse TAC-induced ...
Stewart Ralph A H - - 2010
Left ventricular (LV) hypertrophy and abnormal non-invasive measures of LV diastolic function are common in patients with severe aortic stenosis (AS) but their prognostic importance is uncertain. This study aimed to determine whether tissue Doppler measures of LV systolic and/or diastolic function or echocardiographic LV hypertrophy are useful for risk ...
Mangual Jan O - - 2010
The viscoelastic behavior of myocardial tissue is a measure that has recently found to be a deterministic factor in quality of contraction. Parameters imposing the viscoelastic behavior of the heart are influenced in part by sarcomere function and myocardial composition. Despite the overall agreement on significance of cardiac viscoelasticity, a ...
Shen You-Tang - - 2010
Therapy for chronic systolic heart failure (sHF) has improved over the past 2 decades, but the armamentarium of drugs is limited and consequently sHF remains a leading cause of death and disability. In this investigation, we examined the effects of a novel cardiac myosin activator, omecamtiv mecarbil (formerly CK-1827452) in ...
de Simone Giovanni - - 2010
Left ventricular (LV) mass (LVM) is the most important information requested in hypertensive patients referred for echocardiography. However, LV function also predicts cardiovascular (CV) risk independent of LVM. There is no evidence that addition of LV function significantly improves model prediction of CV risk compared with LVM alone. Thus, composite ...
Maslov M Y MY Division of Cardiology, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD 21287-6568, USA. - - 2010
Adriamycin (ADR) is an established, life-saving antineoplastic agent, the use of which is often limited by cardiotoxicity. ADR-induced cardiomyopathy is often accompanied by depressed myocardial high-energy phosphate (HEP) metabolism. Impaired HEP metabolism has been suggested as a potential mechanism of ADR cardiomyopathy, in which case the bioenergetic decline should precede ...
Rider Oliver J OJ Department of Cardiovascular Medicine, University of Oxford Centre for Clinical Magnetic Resonance Research, University of Oxford, Oxford, - - 2011
The traditionally accepted mechanism for ventricular adaptation to obesity suggests that cavity dilatation in response to increased blood volume and elevated filling pressure results in ventricular hypertrophy as a compensatory mechanism. Our hypothesis was that, instead, initiation of ventricular hypertrophy in obesity may be explained by changes in hormonal milieu ...
Nucifora Gaetano - - 2010
Left ventricular (LV) torsion is emerging as a sensitive parameter of LV systolic myocardial performance. The aim of the present study was to explore the effects of acute myocardial infarction (AMI) on LV torsion and to determine the value of LV torsion early after AMI in predicting LV remodeling at ...
Leu Steve - - 2011
We investigated the potential benefits and the underlying mechanisms of autologous bone marrow-derived mononuclear cell (BMDMNC) implantation in a porcine model of acute anterior wall myocardial infarction (AAWMI) by studying 6-month left ventricular (LV) function and LV remodeling. After being aspirated from the iliac crest and cultured for 1week, BMDMNCs ...
Masci Pier Giorgio - - 2010
Left bundle branch block (LBBB) influences on regional left ventricular (LV) structure, perfusion, and metabolism have not yet been thoroughly investigated in dilated cardiomyopathy patients. Eleven dilated cardiomyopathy patients with LBBB (mean+/-SD age, 62+/-11 years; LV ejection fraction, 35+/-8%) and 7 dilated cardiomyopathy patients without LBBB (mean+/-SD age, 58+/-9 years; ...
Tang W H Wilson - - 2010
Neurohormonal activation is a pathophysiological hallmark of acute and chronic heart failure (HF). The clinical significance of more recently discovered endogenous vasoactive hormones has not been well-characterized. In 154 subjects with stable, chronic systolic HF (New York Heart Association Class I-IV, left ventricular [LV] ejection fraction <or=40%), we measured plasma ...
Puntmann Valentina Otja - - 2010
Regional heterogeneity of left ventricular (LV) hypertrophy may contribute to arrhythmic vulnerability in patients with hypertrophic cardiomyopathy (HCM). The aim of the present study was to investigate the relationship between LV wall thickness (LVWT) and microvolt T-wave alternans (TWA), a surrogate risk marker of ventricular tachyarrhythmias (VTAs). A total of ...
Seifert Martin - - 2010
AIMS: Phrenic nerve stimulation (PNS) can affect, and in some cases considerably limit, the long-term success of cardiac resynchronization therapy (CRT) therapy. To address this common problem, the manufacturers of CRT devices offer a range of configurations aimed at preventing high left ventricular pacing thresholds (LVPTs) and PNS. METHODS AND ...
Chang Sung-A - - 2010
The role of pericardium in left ventricular (LV) twist has not been directly investigated. We sought to determine the role of pericardium in maintenance of LV twist function in an animal experiment, before and after pericardial opening. 13 mongrel dogs were initially operated on, but two dogs were excluded from ...
Busani Stefano - - 2010
The aim of this study is to report the development of cardiac failure after subarachnoid hemorrhage (SAH) with recovery of heart and cerebral function. This is a case report of a 38-year-old woman who was admitted to the intensive care unit (ICU) at Policlinico di Modena, Italy. This woman developed ...
Summers Richard L - - 2010
INTRODUCTION: Pathology driven alterations in the geometric shape of the heart have been found to result in regional changes in ventricular wall stress and a remodeling of the myocardium. If reductions in the gravitational forces acting on the heart produce similar changes in the overall contour of the ventricles, this ...
Marui Akira - - 2010
BACKGROUND: Surgical ventricular restoration (SVR) has been introduced to restore the dilated left ventricular (LV) chamber and improve LV systolic function; however, SVR has also been reported to detrimentally affect LV diastolic properties. We sought to investigate the impact of preoperative LV diastolic function on outcomes after SVR in patients ...
Becker Michael - - 2010
OBJECTIVES: This study sought to evaluate whether left ventricular (LV) lead position in cardiac resynchronization therapy (CRT) can be determined by myocardial deformation imaging during LV pacing and to compare imaging techniques for analysis of LV lead position. BACKGROUND: LV lead position has a significant impact on effectiveness of CRT, ...
Wei Kevin - - 2010
A new consensus statement on the clinical applications of ultrasound contrast agents was published in November 2008 in the Journal of the American Society of Echocardiography. These guidelines provide the rationale for contrast use, and specifically highlight a number of clinical scenarios in which contrast should always be considered. These ...
Pag? Anik - - 2010
OBJECTIVES: The aim of this study was to examine the relationship between metabolic syndrome (MetS) and left ventricular (LV) geometry and function in patients with asymptomatic aortic stenosis (AS). BACKGROUND: Recent experimental studies reveal that, among animals with sustained pressure overload, those with insulin resistance induced by a high-carbohydrate/high-fat diet ...
Baggish Aaron L AL Division of Cardiology, Massachusetts General Hospital, and Department of Medicine, Harvard Medical School, Boston, Mass 02114, USA. - - 2010
Although illicit anabolic-androgenic steroid (AAS) use is widespread, the cardiac effects of long-term AAS use remain inadequately characterized. We compared cardiac parameters in weightlifters reporting long-term AAS use to those in otherwise similar weightlifters without prior AAS exposure. We performed 2D tissue-Doppler and speckle-tracking echocardiography to assess left ventricular (LV) ...
Alpendurada Francisco F Cardiovascular Magnetic Resonance Unit, Royal Brompton Hospital, Sydney Street, London SW3 6NP, - - 2010
Myocardial T2* cardiovascular magnetic resonance (CMR) provides a rapid and reproducible measure of cardiac iron loading and is being increasingly used worldwide for monitoring of transfusion-dependent thalassaemia patients. Although myocardial siderosis (T2* <20 ms) is associated with impaired left ventricular (LV) function, little is known of its relation with right ...
Florescu Maria - - 2010
Athlete's heart is associated with left ventricular (LV) hypertrophy (LVH), and "supranormal" cardiac function, suggesting that this is a physiological process. Hypertrophy alone cannot explain increase in cardiac function, therefore, other mechanisms, such as better ventriculo-arterial coupling might be involved. We studied 60 male (21 +/- 3 years) subjects: 27 ...
Ameri P - - 2010
Vitamin D deficiency has been associated with chronic heart failure (CHF). We evaluated vitamin D levels in relationship with New York Heart Association (NYHA) classes, N-terminal pro-brain natriuretic peptide (NT-proBNP) values and left ventricular (LV) measures in ≥60 year old patients with stable CHF. Differently from previous investigations, LV function ...
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