Search Results
Results 401 - 450 of 2196
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Mahabadi Amir A - - 2009
Left atrial (LA) volume is a predictor of cardiovascular events. Information on LA volume is available on contrast-enhanced electrocardiogram (EGC)-gated multidetector computed tomography (MDCT) scans. To assess interobserver and intraobserver reproducibility of 3-dimensional threshold-based volume (3DTV) and 2-dimensional (2D) measurements for the assessment of LA volumes with contrast-enhanced cardiac 64-slice ...
Blyakhman Felix A - - 2009
AIMS: The goal of this study was to test whether peculiarities of left ventricular (LV) regional function place limits on the validity of ejection fraction (EF) as a measure of the myocardial functional state. METHODS AND RESULTS: Transthoracic and transoesophageal data from patients with a variety of cardiac conditions were ...
Yu Hsi-Yu - - 2009
OBJECTIVE: Clinical improvement after a surgical ventricular restoration for ischemic cardiomyopathy is increasingly accepted by clinicians, but the mechanism is not completely understood. METHODS: Ten patients with ischemic cardiomyopathy underwent detailed magnetic resonance imaging for ventricular function before and 6 weeks after surgical ventricular restoration. Surgical procedures included combinations of ...
Wald Rachel M - - 2009
AIMS: Pulmonary regurgitation (PR) is an important determinant of outcome after tetralogy of Fallot (TOF) repair. The physiologic impact of PR on the right ventricle remains incompletely understood. We hypothesized that a volumetric expression of PR would be a better measure of ventricular preload and a more accurate reflection of ...
Mark Dustin G - - 2009
PURPOSE: To better define the reliability of left ventricular ejection fraction (LVEF) and left ventricular filling, as determined by either hand-carried ultrasound (HCU) or formal transthoracic echocardiography (TTE), in the critically ill surgical patient. MATERIALS AND METHODS: Prospective cross-sectional study of 80 surgical intensive care unit patients with concomitant (<30 ...
Yeh Che-Chung - - 2009
We hypothesize that persistent alterations in molecular signaling may drive recurrent pathologic remodeling even after the reduction of mechanical stress achieved via surgical ventricular reconstruction. We developed a murine model of surgical ventricular reconstruction that would facilitate molecular analysis of the postreconstruction myocardium and allow future exploitation of genetic models. ...
Tsai I-Chen - - 2009
To compare and correlate left ventricular (LV) myocardial volumes obtained using arterial and delayed phases of multidetector row computed tomography (CT) and evaluate their intra- and interobserver variation. Two observers evaluated the arterial- and delayed-phase serial short-axis images of 45 healthy volunteers. Intra- and interobserver variations in LV myocardial volumes ...
Pande Shantanu - - 2009
The outcome of multivessel off-pump coronary artery bypass grafting in cases of severe left ventricular dysfunction was studied in 58 consecutive patients with ejection fraction < or =35% who were followed up for a median of 15 months. Patients with ejection fractions < or =25% (group 1) had the largest ...
Valocik G - - 2009
OBJECTIVES: This study was designed to identify an association between left atrial volume and systolic and diastolic functions of the left ventricle. BACKGROUND: Several studies have shown a relationship between the left atrial volume and different cardiovascular risk factors. METHODS: Transthoracic echocardiographic results of 268 patients (136 women and 132 ...
Ghersin Eduard - - 2009
OBJECTIVES: To evaluate feasibility and accuracy of a fully automatic algorithm (FAA) for calculating left ventricular volumes and ejection fraction (LVEF) from multidetector computed tomography (MDCT) studies versus a previously validated method based on Simpson's method serving as our reference standard (RS), and left ventriculography (LVG), in patients with acute ...
Cirillo Marco - - 2009
BACKGROUND: The history of surgical reconstruction of the left ventricle after an anterior myocardial infarction shows an evolution of techniques which tend to a more and more physiologic restoration of ventricular shape and volume, with increasing attention to the orientation of myocardial fibers. METHODS: We set a new surgical procedure ...
Adam Oliver - - 2009
Dyspnoea is one of the typical symptoms of congestive heart failure. The cause of dyspnoea in this patient with chronic heart failure, 8 months after coronary artery bypass grafting, was a great surprise for the heart failure physician, showing that a more broad view of dyspnoea is warranted in this ...
Vidwan Param - - 2009
Pulsus alternans is a rare hemodynamic condition characterized by beat-to-beat variability in systolic pressure. It is attributed to variations in stroke volume with alternate cardiac cycles and is typically seen in patients with advanced myopathic conditions. Left ventricular pulsus alternans is rare, and right ventricular pulsus alternans is even less ...
Shriki J E - - 2009
30 patients with delayed contrast enhancement in patterns suggestive of myocardial infarctions were reviewed. Infarct mass was quantitatively measured using short axis images obtained in the delayed phase of gadopentetate administration. Left ventricular mass and ejection fraction were measured using short axis, steady state free precession images. A relationship is ...
Cosyns Bernard - - 2009
BACKGROUND: In clinical practice and in clinical trials, echocardiography and scintigraphy are used the most for the evaluation of global left ejection fraction (LVEF) and left ventricular (LV) volumes. Actually, poor quality imaging and geometrical assumptions are the main limitations of LVEF measured by echocardiography. Contrast agents and 3D echocardiography ...
Goldfarb-Rumyantzev Alexander S - - 2009
OBJECTIVE: We examined the relationship between various volume indicators, i.e. multifrequency bioelectric impedance analysis (BIA), predialysis serum N-terminus-pro-brain natriuretic peptide (NT[-]pro[-]BNP) levels, and inferior vena cava diameter, and left ventricular mass index (LVMI) at baseline and with rigorous volume management on thrice-weekly hemodialysis. METHODS: Twenty-two patients on chronic thrice-weekly hemodialysis ...
Ge Ri-Li - - 2009
This study was performed to evaluate the structural and functional cardiac changes in pediatric high altitude pulmonary hypertension (HAPH) using magnetic resonance imaging (MRI) and Doppler echocardiography (Echo). Ten patients with infantile HAPH (aged 12 to 24 months) and eight healthy age-matched children (control group) underwent MRI and Echo studies. ...
Christiaens Luc - - 2010
CONTEXT: Left atrial (LA) volume is a prognosis factor of cardiovascular morbidity in patients with cardiovascular disease (CD). Recent developments of multislice computed tomography (MSCT) have made non invasive coronary angiography reliable for selected patients and new software facilitates truly volume measurements without geometrical assumptions. OBJECTIVE: To define, by using ...
Kiratli Pinar O - - 2009
Echocardiographic and radionuclide techniques are the most common techniques currently used to assess ventricular function. The aim of our study was to assess the performance of two well-known methods for analysis of gated myocardial perfusion with comparison to echocardiography in children. We analyzed the data from 64 children referred for ...
Park Jinho - - 2009
We investigated magnetic resonance imaging T2-star (MRI-T2*) values and left ventricular ejection fraction (LVEF) in 7 adult patients with bone marrow failure with heavy transfusion to elucidate the correlation between cardiac iron overload and dysfunction. We demonstrated a positive correlation between the total volume of red blood cells (RBC) transfusion ...
Snygg J - - 2009
BACKGROUND: Static vascular filling pressures suffer from poor predictive power in identifying the volume-responsive heart. The use of dynamic arterial pressure variables, including pulse pressure variation (PPV) has instead been suggested to guide volume therapy. The aim of the present study was to evaluate the performance of several clinically applicable ...
Delgado Victoria - - 2008
OBJECTIVE: Automated function imaging (AFI) is a novel algorithm based on speckle-tracking imaging that can be used for assessment of global longitudinal strain of the left ventricle. The purpose of this study was to evaluate the relation between global longitudinal peak systolic strain average (GLPSS Avg) assessed by AFI and ...
Kawut Steven M - - 2009
Right ventricular function is a key determinant of exercise capacity and survival in pulmonary arterial hypertension (PAH). We aimed to study the predictors of right ventricular ejection fraction (RVEF) in patients with newly diagnosed PAH. We performed a cross-sectional analysis of a retrospective cohort of consecutive patients with idiopathic, familial, ...
Gimenes Vera M L - - 2008
BACKGROUND: There is a paucity of information describing the real-time 3-dimensional echocardiography (RT3DE) and dyssynchrony indexes (DIs) of a normal population. We evaluate the RT3DE DIs in a population with normal electrocardiograms and 2- and 3-dimensional echocardiographic analyses. This information is relevant for cardiac resynchronization therapy. METHODS: We evaluated 131 ...
Barbukhatti Kirill O - - 2009
Giant left atrium is a pathology that causes a lot of different complications, therefore it is very important to perform volume reduction. In some cases left atrium volume reaches a huge size. There are a lot of different methods for left atrium reduction: from wall plication, multicomponent resection followed by ...
Pérez de Isla Leopoldo - - 2008
BACKGROUND AND AIM: To date, in-hospital mortality predictors of patients with heart failure and depressed left ventricular ejection fraction are well known. Nevertheless, this is not the case of patients suffering from heart failure with preserved left ventricular ejection fraction. Our aim is to describe the incidence and predictors of ...
Frigiola Alessandra - - 2008
BACKGROUND: The timing of pulmonary valve replacement (PVR) for free pulmonary incompetence in patients with congenital heart disease remains a dilemma for clinicians. We wanted to assess the determinants of improvement after PVR for pulmonary regurgitation over a wide range of patient ages and to use any identified predictors to ...
Takeda Koji - - 2008
BACKGROUND: Left ventricular restoration (LVR) is increasingly used for treatment of chronic heart failure following myocardial infarction. The present multi-institutional retrospective study analyzed the long-term efficacy and limitations of LVR. METHODS AND RESULTS: Seventy-two (58 males, mean age 62+/-10) patients who underwent LVR between January 1999 and June 2007 were ...
Menon Shaji C - - 2008
Left atrial (LA) enlargement is an indicator of chronic elevation in left ventricular (LV) end-diastolic pressure as well as diastolic dysfunction. There is a lack of data on the significance of LA volume in the pediatric population. The objective of this study was to elucidate the relation between LA volume ...
Grosse-Wortmann Lars - - 2008
OBJECTIVES: We sought to compare the usefulness of echocardiography and magnetic resonance imaging in neonates with a borderline small left ventricle. METHODS: The preoperative magnetic resonance and echocardiography studies of 20 consecutive patients (mean age 10 +/- 9 days) undergoing magnetic resonance imaging were analyzed. The diagnoses were aortic stenosis ...
Hein M - - 2008
BACKGROUND: In contrast to other volatile anesthetics, xenon produces less cardiovascular depression with fewer fluctuations of various hemodynamic parameters, but reduces cardiac output (CO) in vivo. Besides an increase in left ventricular afterload and reduction of heart rate, an impairment of the right ventricular function might be an additional pathophysiological ...
Looi J C L - - 2008
BACKGROUND AND PURPOSE: Frontostriatal circuits involving the caudate nucleus have been implicated in frontotemporal lobar degeneration (FTLD). We assessed caudate nucleus volumetrics in FTLD and subtypes: frontotemporal dementia (FTD, n = 12), semantic dementia (SD, n = 13), and progressive nonfluent aphasia (PNFA, n = 9) in comparison with healthy ...
Javidi Daryoosh - - 2008
Left ventricular myocardial performance index is a Doppler-derived parameter of nongeometrical ventricular function that measures both systolic and diastolic function of the left ventricle. The objective of this study was to compare prognostic value of left ventricular myocardial performance index with global left ventricle function in patients undergoing coronary artery ...
Wassmuth Ralf - - 2008
BACKGROUND: Cardiac involvement in Churg-Strauss vasculitis worsens the prognosis. Early detection is, therefore, warranted. Cardiac magnetic resonance (CMR) can visualize various forms of inflammatory changes in the myocardium. We tested whether CMR could elucidate cardiac damage in patients with biopsy-proven Churg-Strauss syndrome and clinical evidence of cardiac involvement. METHODS AND ...
Psaltis Peter J - - 2008
BACKGROUND: There is a paucity of published experience investigating novel treatment strategies in preclinical and clinical studies of nonischemic cardiomyopathy. We set out to validate an ovine model of doxorubicin-induced cardiomyopathy, using cardiac magnetic resonance (CMR) to assess cardiac function. METHODS AND RESULTS: Ten Merino sheep (51 +/- 8 kg) ...
Ostenfeld Ellen - - 2008
Studies seeking to validate real-time three-dimensional echocardiography (3DE) with regard to cardiac function and dimensions have almost exclusively used apical views. However, it has never been examined whether apical views are preferable to parasternal or subcostal views. In the present study, we compared the feasibility of 3DE volumetric measurements of ...
Murata Mitsushige - - 2008
The evaluation of left ventricular diastolic function provides important information about hemodynamics and has prognostic implications for various cardiac diseases. In particular, left atrial (LA) volume is an increasingly significant prognostic biomarker for diastolic dysfunction. The aim of this study was to assess left ventricular diastolic function by measuring changes ...
Tutschek B - - 2008
OBJECTIVE: To develop a novel application of a tool for semi-automatic volume segmentation and adapt it for analysis of fetal cardiac cavities and vessels from heart volume datasets. METHODS: We studied retrospectively virtual cardiac volume cycles obtained with spatiotemporal image correlation (STIC) from six fetuses with postnatally confirmed diagnoses: four ...
Stuckey Daniel J DJ Cardiac Metabolism Research Group, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK. - - 2008
Two-dimensional echocardiography is the most commonly used non-invasive method for measuring in vivo cardiac function in experimental animals. In humans, measurements of cardiac function made using cine-MRI compare favourably with those made using echocardiography. However, no rigorous comparison has been made in small animals. Here, standard short-axis two-dimensional (2D) echocardiography ...
Narang Sumit - - 2008
OBJECTIVE: Our aim was to compare stentless and stented bioprostheses. Clinical outcomes, hemodynamic performance, and postoperative left ventricular mass regression were the principal outcomes assessed. METHODS: Sixty-two patients were recruited for the study. Our protocol was to consider all patients older than 55 years for bioprostheses, and also younger patients ...
Kolon Thomas F - - 2008
PURPOSE: We assessed the testicular growth of adolescent males followed nonsurgically for the presence of left varicocele. MATERIALS AND METHODS: We retrospectively reviewed the charts of adolescent males with a diagnosis of unilateral left varicocele and ultrasound testis volume measurements seen during a 10-year period. A total of 161 boys ...
Wahbi Karim - - 2008
Mutations in the FKRP gene may be associated with cardiac involvement. The aim of our study was to assess myocardial involvement in patients with LGMD2I, using physical examination, echocardiography, resting and 24-h ambulatory electrocardiogram and cardiac magnetic resonance imaging, with particular attention to the detection of myocardial morphologic abnormalities. Patients ...
Cho Kwang Ree - - 2008
OBJECTIVE: We evaluated the potency of therapeutic angiogenesis using intramyocardial injection of naked DNA expressing two isoforms of hepatocyte growth factor (pCK-HGF-X7) in a porcine myocardial infarction model. METHODS: Four weeks after left anterior descending coronary artery ligation, 14 pigs were allocated to pCK-Null (negative control, n=7) or pCK-HGF-X7 (n=7) ...
Detombe Sarah A - - 2008
OBJECTIVES: Mouse models of myocardial infarction are valuable in studying the effect of genetic modifications on structural and functional remodeling of the heart. Our group recently developed a method for acquiring three-dimensional images of the beating mouse heart using micro-computed tomography (micro-CT) and retrospective gating. In this study, we evaluated ...
Yakabe K - - 2008
AIM: The load dependence of Tei-index, an index to estimate combined systolic and diastolic ventricular functions, remains controversial. Moreover, its significance in the setting of acute preload reduction including hemodialysis (HD) remains unknown. Therefore, we examined the significance of the Tei-index in HD patients. PATIENTS AND METHODS: Doppler echocardiographic parameters ...
Athanasuleas Constantine L - - 2008
Surgical restoration of the failing heart is related to rebuilding cardiac architecture and linked to: (a) understanding that the structure of the failing dilated heart involves changing the normal elliptic shape toward a dilated spherical form; (b) recognizing the anatomic fiber orientation framework and its functional implications; (c) establishing imaging ...
Malayeri Ashkan Akhavan - - 2008
To determine the correlation function between the steady-state free precession (SSFP) and fast gradient echo (FGRE) cine MRI pulse sequences for measuring the myocardial mass and volumes. Cardiac cine MRI examinations were acquired in 50 individuals (female: 35, male: 15, mean age 64.1 +/- 9.1 years, range 48-83) using SSFP ...
Acierno Raffaele - - 2008
The aim of this work was to investigate in the avascular heart of the frog Rana esculenta the influence of nitric oxide (NO) on ventricular systolic and diastolic functions by using a novel image analysis technique. The external volume variations of the whole ventricle were monitored during the heart cycle ...
Mavrogeni Sophie - - 2008
INTRODUCTION: b-Thalassemia major (TM) and thalassemia intermedia (TI) are forms of inherited hemoglobinopathies. Our aim was to evaluate a population of asymptomatic TM and TI patients using cardiovascular magnetic resonance (CMR). We hypothesized that the TI group could be differentiated from the TM group based on T2*. We also hypothesized ...
Rutten Frans H - - 2008
BACKGROUND: Although cardiovascular magnetic resonance imaging (CMR) is well established, its diagnostic accuracy in identifying chronic heart failure (CHF) in patients with chronic obstructive pulmonary disease (COPD) has not yet been quantified. METHODS: Participants were recruited from a cohort of 405 patients aged >or=65 years, with mild to moderate and ...
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