Search Results
Results 451 - 500 of 2227
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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 ...
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 ...
Kawut Steven M SM Department of Medicine, Columbia University, New York, NY, USA. - - 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, ...
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 AA Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287, - - 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 ...
Kombogiorgas Dimitris - - 2008
OBJECT: In this study, the authors investigated whether preoperative ventricular volume can be used to predict the need for permanent treatment of hydrocephalus in children with posterior fossa medulloblastomas. METHODS: Ventricular volumes were measured on magnetic resonance imaging studies obtained preoperatively and immediately postoperatively in 20 children who had undergone ...
Dumitrascu George - - 2008
Introduction: Modern understanding of the hemodynamic changes during puerperium is based on investigations from 1969(1) and 1979(2). These studies evaluated changes in intracardiac pressures and described a state of relative hypervolemia with an increase in cardiac output up to 75% above predelivery values. No recent studies have addressed the changes ...
Cali┼čkan Mustafa - - 2008
We evaluated the effect of carvedilol, a nonselective beta-blocker with vasodilating action, on coronary flow reserve (CFR) in patients with idiopathic dilated cardiomyopathy (IDC). Twenty-four patients (17 males, 7 females; mean age 57+/-11 years) with IDC were consecutively enrolled. After obtaining clinical and hemodynamic stabilization, transthoracic echocardiography was performed including ...
Garson Christopher D CD University of Virginia, Charlottesville, VA 22908, USA. - - 2008
The active surface technique using gradient vector flow allows semi-automated segmentation of ventricular borders. The accuracy of the algorithm depends on the optimal selection of several key parameters. We investigated the use of conservation of myocardial volume for quantitative assessment of each of these parameters using synthetic and in vivo ...
Vidal Christine N CN Laboratory of Neuro Imaging, Brain Mapping Division, Department Neurology, UCLA School of Medicine, Los Angeles, California, - - 2008
In this study, a computational mapping technique was used to examine the three-dimensional profile of the lateral ventricles in autism. T1-weighted three-dimensional magnetic resonance images of the brain were acquired from 20 males with autism (age: 10.1+/-3.5 years) and 22 male control subjects (age: 10.7+/-2.5 years). The lateral ventricles were ...
Bastarrika Gorka - - 2008
The purpose of this study was to compare LV function and mass quantification derived from cardiac dual-source CT (DSCT) exams with those obtained by MRI in heart transplant recipients. Twelve heart transplant recipients who underwent cardiac DSCT and MRI examination were included. Double-oblique short-axis 8-mm slice thickness images were evaluated. ...
Takeda Koji - - 2008
OBJECTIVE: Preserved myocardial function remote from surgical site is crucial for good outcome after surgical ventricular restoration in ischemic cardiomyopathy. We hypothesized that left ventricular scarring untouched by operation would negatively affect postoperative outcome. METHODS: In 15 consecutive patients (mean age 61 +/- 12 years, mean left ventricular ejection fraction ...
Mandegar Mohammad Hossein - - 2008
OBJECTIVE: In patients with ischemic cardiomyopathy and substantial amounts of dysfunctional but viable myocardium, revascularization cannot always improve the left ventricular ejection fraction. We sought to investigate the interaction between the left ventricular volume and the amount of viable myocardium to predict the left ventricular ejection fraction increase after revascularization. ...
Yankey Godfred K - - 2008
OBJECTIVE: Progressive left ventricular remodeling after myocardial infarction has been viewed as an important contributor to progressive heart failure. The objective of this study was to investigate the relationship between myocardial apoptosis and strain during progressive cardiac remodeling. METHODS: Before creation of an anterolateral left ventricular infarction by ligation of ...
Stolzmann Paul - - 2008
OBJECTIVES: We sought to determine the agreement for the quantification of cardiac chamber dimensions, volumes, and myocardial mass between dual-source computed tomography (DSCT) and echocardiography. MATERIAL AND METHODS: One-hundred patients underwent DSCT and transthoracal echocardiography within 1 week. Measurements of dimensions were obtained in standardized planes in end-systole and end-diastole ...
Vanek Tomas - - 2008
We present a case of a 62-year-old male patient (coronary heart disease, and stenosis of aortic valve) with severe left ventricular dysfunction (left ventricular ejection fraction 20%, left ventricular end-diastolic diameter 80 mm, end-diastolic volume 329 ml) who developed giant electrical storm (on the whole 115 episodes of pulseless ventricular ...
Ugander Martin - - 2008
OBJECTIVES: We sought to study the relationship between left ventricular ejection fraction (LVEF) and infarct size in patients with ischemic heart disease (IHD) using magnetic resonance imaging (MRI), and to determine a dysfunction index based on the maximum possible LVEF in relation to infarct size. DESIGN: In 149 patients with ...
Mihl C - - 2008
Cardiac remodelling is commonly defined as a physiological or pathological state that may occur after conditions such as myocardial infarction, pressure overload, idiopathic dilated cardiomyopathy or volume overload. When training excessively, the heart develops several myocardial adaptations causing a physiological state of cardiac remodelling. These morphological changes depend on the ...
Sousa Marlos G - - 2008
OBJECTIVE: To study the echocardiographic effects of isoflurane at an end-tidal concentration approximating 1.0 times the minimum alveolar concentration (MAC) in healthy unpremedicated dogs. STUDY DESIGN: Prospective experimental trial. ANIMALS: Sixteen mature mongrel dogs of either sex weighing 11.06 +/- 2.72 kg. METHODS: After performing a baseline echocardiogram in the ...
Duran Nilüfer - - 2008
OBJECTIVES: To evaluate the long-term follow-up results of patients with peripartum cardiomyopathy and assess the echocardiographic findings relating to prognosis at time of diagnosis. METHODS: Thirty-three patients diagnosed with peripartum cardiomyopathy and hospitalized between 1995 and 2007 were analyzed. Initial echocardiographic data were recorded and long-term clinical status was evaluated. ...
Hiscock Sarah C - - 2008
BACKGROUND: An investigation has been undertaken to calculate normal ranges for left ventricular ejection fraction (LVEF) measured by the gated blood pool (GBP) technique. A common set of normal studies was used at 11 hospitals within the south of England to assess the variability of results and normal ranges. METHODS: ...
Soliman Hamad Mohamed A - - 2008
BACKGROUND: In this prospective study, we investigated the determinants of long-term outcome, symptoms, and left ventricular function after coronary artery bypass grafting in patients with a moderate to severely decreased left ventricular ejection fraction. METHODS: Between 1997 and 1998, 75 consecutive patients with moderate to severe left ventricular dysfunction underwent ...
Terasawa Yuka - - 2008
BACKGROUND AND PURPOSE: The mechanism of neurological deterioration in small vessel disease is unclear. We examined the relationship between neurological deterioration and change of infarct volume in acute small vessel disease. METHODS: We studied consecutive patients with acute supratentorial small vessel disease. Patients were classified into two groups (D: group ...
Teo Karen S L - - 2008
BACKGROUND: Percutaneous closure of atrial septal defects (ASDs) should potentially reduce right heart volumes by removing left-to-right shunting. Due to ventricular interdependence, this may be associated with impaired left ventricular filling and potentially function. Furthermore, atrial changes post-ASD closure have been poorly understood and may be important for understanding risk ...
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