Search Results
Results 301 - 350 of 2227
< 2 3 4 5 6 7 8 9 10 11 12 >
Broberg Craig S CS Adult Congenital Heart Disease Program, Oregon Health and Science University, Portland, Ore., USA. - - 2010
the etiology of ventricular dysfunction in adult congenital heart disease (ACHD) is not well understood. Diffuse fibrosis is a likely common final pathway and is quantifiable using MRI. patients with ACHD (n=50) were studied with cardiac MRI to quantify systemic ventricular volume and function and diffuse fibrosis. The fibrosis index ...
Wilson Helen E - - 2010
Anaemia induces haemodynamic compensatory mechanisms resulting in volume overload and increased left heart dimensions in humans and dogs. The aims of this retrospective study were to investigate the effects of anaemia on echocardiographic left heart dimensions, vertebral heart size (VHS) and radiographic evidence of congestive heart failure (CHF) in cats. Fifteen cats ...
Cowie B S - - 2010
Ultrasound applications in perioperative medicine have expanded enormously over the past decade. Transoesophageal echocardiography has been performed by anaesthetists during cardiac surgery for over 20 years. With the increasing availability of portable ultrasound systems, the use of ultrasound to assist in vascular cannulation and regional anaesthesia has been well described. ...
Singh Raveen - - 2010
The deleterious effects of anesthetic agents in patients suffering from coronary artery disease are well known. The risk increases when a patient has compromised ventricular function. There is a paucity of literature regarding the choice of the suitable agent to avoid deleterious effects in such patients. The use of etomidate ...
Chang Xiao-Rong - - 2010
The effect of acupuncture at the acupoints of 12 meridians on gastrointestinal and cardiac electricity in healthy adults was studied. Specific regulation between meridian points and viscera was also investigated. An electrogastrogram (EGG), electrointestinogram (EIG), carotid pulse graph, phonocardiogram and electrocardiogram were obtained in 30 healthy adults before and after ...
Scharf Michael - - 2010
PURPOSE: To assess cardiac morphologic and functional adaptations in elite triathletes with magnetic resonance (MR) imaging and to compare findings to those in recreationally active control subjects. MATERIALS AND METHODS: The institutional review board approved the study, and written informed consent was obtained from all subjects. Twenty-six male triathletes (mean ...
Chouliaras Giorgos L - - 2010
Cardiac Magnetic Resonance (CMR) has replaced all other surrogate measurements in the determination of transfusional cardiac iron overload in patients with thalassaemia major. We aimed to determine the diagnostic value of CMR T2* with respect to cardiac dysfunction (CD) as determined by CMR-derived left ventricular ejection fraction (LVEF). Cardiac T2* ...
Ugander Martin - - 2010
PURPOSE: To prospectively evaluate the usefulness of magnetic resonance (MR) imaging for estimating pulmonary blood volume (PBV) and the variation in PBV throughout the cardiac cycle in experimental heart failure. MATERIALS AND METHODS: The animal care committee approved this prospective study. Seven pigs were studied before and after myocardial infarction. ...
Reant Patricia - - 2010
Conventionally, the evaluation of left ventricular (LV) systolic function is based on ejection fraction assessment, which may be supplemented by other echocardiographic techniques, such as tissue Doppler imaging, 3D evaluation, and speckle tracking strains. However, these imaging modalities have a high technicity and are time-consuming, while being associated with reproducibility ...
Bauer Axel - - 2010
Assessment of spontaneous baroreflex sensitivity (BRS), an index of autonomic function, poses practical challenges. In this pilot study, we propose a novel technique for assessment of spontaneous BRS based on bivariate phase-rectified signal averaging (PRSA). This is an extension of the monovariate PRSA technology used for calculation of deceleration capacity. ...
Vural Murat - - 2010
To compare multidetector computed tomography (MDCT) and two-dimensional transthoracic echocardiography (2DE) for left ventricular ejection fraction (EF); and to make comparison between reconstructions of 1-mm and 2-mm slice thickness at MDCT in left ventricular analysis by using a semiautomated segmentation algorithm. In 43 patients global left ventricular systolic function was ...
Herberg U - - 2011
The aim of this study was to assess the feasibility, accuracy and reliability of 3D real-time echocardiography for fetal heart volumetry. Fifty unselected and consecutive fetuses, including 14 with cardiac malformations, were scanned prospectively using real-time 3D matrix technology and 2D echocardiography to determine ventricular volumes. Small phantoms as well ...
Wachtell Kristian - - 2010
Endocardial fractional shortening (EFS) and midwall shortening (MWS) are impaired in patients with left ventricular hypertrophy. However, it remains unknown whether improvement of left ventricular systolic function during treatment reduces cardiovascular morbidity and mortality in hypertensive patients with preserved left ventricular function. Echocardiograms were performed yearly in 840 hypertensive patients ...
Filizcan U─čur - - 2010
Left ventricular (LV) pseudoaneurysm is a rare complication of myocardial infarction. It may also occur as a complication of mitral valve surgery, chest trauma, and bacterial endocarditis. It forms when a cardiac rupture contains adherent pericardium or scar tissue and is typically located on the posterior or inferior LV wall. ...
Guo Shi-Zun - - 2010
Granulocyte colony-stimulating factor (G-CSF) seems to improve cardiac function and perfusion when used systemically through mobilization of stem cells into peripheral blood, but results of previous clinical trials remain controversial. This study was designed to investigate safety and efficacy of subcutaneous injection of G-CSF on left ventricular function in patients ...
Heidary Shahriar - - 2010
OBJECTIVES: This study evaluates how characterization of tissue heterogeneity of myocardial infarction by cardiovascular magnetic resonance (CMR) is associated with cardiovascular events (CVE) in patients with ischemic cardiomyopathy (ICM). BACKGROUND: Prior studies demonstrated that the quantification of myocardial scar volume by CMR is superior to left ventricular end-diastolic volume, left ...
Kazui Toshinobu - - 2011
We performed echocardiographic tissue tracking to investigate whether mitral valve repair preserves left ventricular function. We studied 16 subjects without heart disease (11 male; mean age, 54.6 ± 15.1 years) and 18 patients in normal sinus rhythm undergoing solitary mitral valve repair (12 male; mean age, 53.6 ± 16.6 years). Transthoracic echocardiography ...
Babbs Charles F - - 2010
The conventional impedance cardiogram is a record of pulsatile changes in the electrical impedance of the chest with each heartbeat. The signal seems intuitively related to cardiac stroke volume. However doubts persist about the validity of stroke volume measurements based on electrical impedance. This paper presents a new electrical axis ...
Animasahun B A - - 2010
BACKGROUND: Few studies documenting the echocardiographic findings of patients with sickle cell anaemia have been reported from Africa despite the high prevalence of the disease on the continent. AIMS AND OBJECTIVES: The present study aimed to determine echocardiographic cardiac dimensions and haemodynamic parameters of children with homozygous sickle cell anaemia ...
Hong Ji Yeon - - 2010
Heart failure rarely occurs in patients with thyrotoxicosis (6%), with half of the cases having left ventricular dysfunction (LVD). Although a few studies reported isolated right heart failure in thyrotoxicosis, there has been no evaluation of relationship between LVD and right ventricular dysfunction (RVD). We enrolled 12 patients (mean age: ...
Cheung Yiu-fai - - 2010
The M-mode-derived left ventricular shortening fraction is incorporated into most of the paediatric oncology protocols for monitoring of cardiotoxicity. This study tested the hypothesis that alteration of left ventricular myocardial deformation and mechanical dyssynchrony may occur in asymptomatic children after anthracycline therapy despite having left ventricular shortening fractions within the ...
van der Veen Berlinda J - - 2010
Semiquantitative analysis of myocardial perfusion scintigraphy (MPS) has reduced inter- and intraobserver variability, and enables researchers to compare parameters in the same patient over time, or between groups of patients. There are several software packages available that are designed to process MPS data and quantify parameters. In this study the ...
Baba Akiyasu - - 2010
Cardiodepressant IgG3 autoantibodies (CD-Abs) can be targeted by apheresis. Using blinded measurements of CD-Abs before and after immunoadsorption (IA), the cardiac function of patients who did or did not achieve complete CD-Abs elimination was compared. Autoantibodies were completely removed from 18 patients with heart failure (New York Heart Association class ...
Riesenkampff Eugénie - - 2010
The atria play an important role in cardiac performance. We evaluated their function and the atrioventricular interaction in operated patients with tetralogy of Fallot (TOF). Twenty patients who had undergone surgical repair of TOF and seven controls were investigated. Patients had residual pulmonary but no major tricuspid valve insufficiency. Atrial ...
Chrysohoou Christina - - 2010
The purpose of this work was to evaluate the relation between serum glucose levels at hospital admission and left ventricular systolic function in nondiabetic patients with an acute coronary syndrome (ACS). Of the 1000 ACS patients who were consecutively enrolled during 2007-2008, 583 (63 +/- 13 years, 20% females) nondiabetic ...
Calafiore Antonio M - - 2010
OBJECTIVE: We report the long-term results of left ventricular surgical restoration in which 2 different strategies were used, which had restoration of ventricular volume or ventricular shape as their target. METHODS: From 1988 to 2008, 308 patients with anterior scars underwent elective left ventricular surgical restoration. Before 2002, a Dor ...
Nihill Michael R - - 2010
OBJECTIVES: To develop a simple method to assess right ventricular function by angiography. BACKGROUND: Conventional methods of evaluating right ventricular function are inaccurate, cumbersome, and expensive. METHODS: We analyzed biplane right ventricular angiograms taken in the posterior-anterior and lateral projections using software to measure right ventricular volumes and regional wall ...
Scharf Michael - - 2010
BACKGROUND: Professional, long-term physical training is associated with cardiac morphologic and functional changes that depend on the type of exercise performed. So far, the specific effect of soccer training on cardiac morphology has not been investigated with cardiac magnetic resonance imaging (CMRI). We sought to use CMRI to study left ...
Macron Laurent - - 2010
Real-time 3-dimensional echocardiography (RT3DE) is superior to 2D echocardiography in assessing left ventricular (LV) volumes and ejection fraction (EF), but its feasibility is limited by multibeat acquisition, which requires an optimal breath-hold and a regular heart rhythm. We sought to evaluate the accuracy and feasibility of single- and 2-beat RT3DE ...
Gweon Hye Mi - - 2010
To prospectively assess the relationship between the two different measurement methods for the evaluation of left atrial (LA) volume using cardiac multidetector computed tomography (MDCT) and to compare the results between cardiac MDCT and echocardiography. Thirty-five patients (20 men, 15 women; mean age, 60 years) underwent cardiac MDCT angiography for ...
Wolf Florian - - 2010
The purpose of this study was to compare a manual and automated 3D volume segmentation tool for evaluation of left atrial (LA) function by 64-slice multidetector-CT (MDCT). In 33 patients with paroxysmal atrial fibrillation a MDCT scan was performed before radiofrequency-catheter ablation. Atrial function (minimal volume (LAmin), maximal volume (LAmax), ...
Grosse-Wortmann Lars - - 2010
The aim of the paper was to investigate the right ventricle in paediatric dilated cardiomyopathy. We examined 11 patients with dilated cardiomyopathy as well as 12 normal paediatric controls. Cardiac magnetic resonance imaging was performed for ventricular size and function. N-terminal pro-brain natriuretic peptide was collected at this time and ...
Rathod Rahul H - - 2010
OBJECTIVES: The purpose of this study was to evaluate the relationship between myocardial fibrosis identified by cardiac magnetic resonance (CMR) and ventricular performance and arrhythmias in patients late after the Fontan operation. BACKGROUND: Patients who have undergone the Fontan palliation may develop ventricular dysfunction and arrhythmias, but the mechanisms and ...
Di Donato Marisa - - 2010
Left ventricular end-diastolic volume is decreased and ejection fraction is increased after surgical ventricular reconstruction; however, the impact on left ventricular stroke volume is not well established. We analyzed 248 consecutive patients who underwent surgical ventricular reconstruction at a single center. There were 14 perioperative deaths (5.6%). The 234 surviving ...
ten Brinke Ellen A - - 2010
Previous studies demonstrated beneficial short-term effects of surgical ventricular restoration on mechanical dyssynchrony and left ventricular function and improved midterm and long-term clinical parameters. However, long-term effects on systolic and diastolic left ventricular function are still largely unknown. We studied 9 patients with ischemic dilated cardiomyopathy who underwent surgical ventricular ...
Wilson Thad E - - 2010
To determine whether skin surface cooling increases left ventricular preload and contractility to a greater extent in older compared with young adults we studied 11 young (28 +/- 2 yr; means +/- SE) and 11 older (64 +/- 3 yr) adults during normothermia (35 degrees C water perfused through a ...
McNamara Patrick J - - 2010
OBJECTIVE: Patent ductus arteriosus ligation is often complicated by systemic hypotension and oxygenation failure. The ability of the immature myocardium to compensate for altered afterload is poorly understood. The aim of this study was to characterize the effects of patent ductus arteriosus ligation on myocardial performance in preterm infants. METHODS: ...
Huisman Jennifer - - 2010
AIMS: To assess for the first time in a multicentre design the between-centre reproducibility of volumetric virtual histology intravascular ultrasound (VH-IVUS) measurements with a semi-automated, computerassisted contour detection system in mild-to-moderately diseased coronary segments. METHODS AND RESULTS: Analysts of four European IVUS centres performed independent IVUS analyses (in total 7,188 ...
Lee Lawrence S LS Division of Cardiac Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, - - 2010
Effects of ventricular restraint on the left ventricle are well documented, but effects on the right ventricle are not. We hypothesized that restraint affects the right and left ventricles differently. We studied acute effects of restraint on left and right ventricular mechanics in healthy sheep (n = 14) with our ...
Giles Jon T JT Johns Hopkins University, Baltimore, Maryland 21224, - - 2010
Heart failure is a major contributor to cardiovascular morbidity and mortality in patients with rheumatoid arthritis (RA), but little is known about myocardial structure and function in this population. This study was undertaken to assess the factors associated with progression to heart failure in patients with RA. With the use ...
Yuce Murat - - 2010
Reliable echocardiographic markers additional to plasma biomarkers that would establish prognosis of chronic heart failure and guide therapeutic approach would be beneficial. In our hypothesis, echocardiographic assessment of coronary sinus anatomic alteration, which has been ignored, may be part of remodeling process in heart failure. We also aimed to evaluate ...
Sun Kay K Department of Surgery, University of California, San Francisco, Calif, - - 2010
Endoventricular patch plasty (Dor) is used to reduce left ventricular volume after myocardial infarction and subsequent left ventricular remodeling. End-diastolic and end-systolic pressure-volume and Starling relationships were measured, and magnetic resonance images with noninvasive tags were used to calculate 3-dimensional myocardial strain in 6 sheep 2 weeks before and 2 ...
Loiske K - - 2010
PURPOSE: The size of the ventricles of the heart is important to establish during the clinical echocardiographic examination. Due to the complex anatomy of the right ventricle, it is difficult to measure its size at times. One of the most frequently used ways is to measure the right ventricular outflow ...
Müller Hajo - - 2010
AIMS: Left atrial (LA) volume can be determined during radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF) with angiography or electro-anatomic (CARTO) mapping. We compared these volumes with LA volume measured using transthoracic real-time three-dimensional echocardiography (3DE). METHODS AND RESULTS: One hundred and twenty-seven consecutive patients undergoing RFCA for AF ...
Fukushima Ryuji - - 2010
It is required not to increase the ventricular rate and to preserve the ventricular systolic function in treating supraventricular tachyarrhythmia (SVTA). The objective of this study is to investigate whether or not Efonidipine hydrochloride (EH), a T and L dual type Ca(2+) channel blocker, suppresses the increasing ventricular rate without ...
Ceriani Luca - - 2010
The purposes of this study were to characterize the performance of a 3-dimensional (3D) ordered-subset expectation maximization (OSEM) algorithm in the quantification of left ventricular (LV) function with (99m)Tc-labeled agent gated SPECT (G-SPECT), the QGS program, and a beating-heart phantom and to optimize the reconstruction parameters for clinical applications. METHODS: ...
Thierer Jorge - - 2010
Catabolism and inflammation play a role in the physiopathology of heart failure with reduced ejection fraction and are more pronounced in the advanced stages of the disease. Our aim was to demonstrate that in patients with stable heart failure with reduced ejection fraction adequately treated, a direct relation exists between ...
Trivax Justin E - - 2010
We sought to clarify the significance of cardiac dysfunction and to assess its relationship with elevated biomarkers by using cardiovascular magnetic resonance imaging in healthy, middle-aged subjects immediately after they ran 26.2 miles. Cardiac dysfunction and elevated blood markers of myocardial injury have been reported after prolonged strenuous exercise. From ...
Lee Ki-Ja - - 2010
OBJECTIVE: To evaluate lateral ventricular size in clinically normal calves by use of computed tomography and to examine the relationships between ventricular height (Vh), ventricular area (VA), and ventricular volume (VV). ANIMALS: 14 Holstein calves. Procedures-14 calves underwent computed tomography of the head with transverse images acquired from the rostral ...
Wen Zhaoying - - 2010
We wanted to assess the performance of dual-source CT (DSCT) for evaluating the left atrial volume and function and we compared this performance to that of the standard reference technique,cardiac cine MR (CMR). Fifty-one patients who were referred for CT coronary angiography were included in the study. Two were subsequently ...
< 2 3 4 5 6 7 8 9 10 11 12 >