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Results 451 - 500 of 2213
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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 ...
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 - - 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 - - 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 ...
Maret Eva - - 2008
BACKGROUND: Left ventricular size and function are important prognostic factors in heart disease. Their measurement is the most frequent reason for sending patients to the echo lab. These measurements have important implications for therapy but are sensitive to the skill of the operator. Earlier automated echo-based methods have not become ...
Migrino Raymond Q - - 2008
BACKGROUND: Light chain amyloidosis (AL) is a rare but often fatal disease due to intractable heart failure. Amyloid deposition leads to diastolic dysfunction and often preserved ejection fraction. We hypothesize that AL is associated with regional systolic dyssynchrony. The aim is to compare left ventricular (LV) regional synchrony in AL ...
Gentry-Smetana S - - 2008
The volatile anesthetics are a class of general anesthetic drugs used by the perfusionist during cardiopulmonary bypass (CPB). These agents are used in low doses in combination with other anesthetics to produce complete anesthesia. During CPB, these agents are capable of safely anesthetizing the paitent. It is well understood that ...
Cirillo Marco - - 2008
BACKGROUND: The techniques of surgical reconstruction of the left ventricle after an anterior myocardial infarction have evolved toward an increasingly physiologic restoration of ventricular shape and volume, with increasing attention being paid to the multilayered structure of myocardial fibers. METHODS: We describe the case of a patient who underwent operation ...
Abuhamad A - - 2008
OBJECTIVE: To evaluate prospectively the performance of software that automatically retrieves, from a three-dimensional (3D) volume of the fetal chest, three diagnostic cardiac planes in the second trimester of pregnancy. METHODS: 3D static volumes of the fetal chest were acquired at the level of the four-chamber view in 72 fetuses ...
Winter Michiel M - - 2008
BACKGROUND: The method used to delineate the boundary of the right ventricle (RV), relative to the trabeculations and papillary muscles in cardiovascular magnetic resonance (CMR) ventricular volume analysis, may matter more when these structures are hypertrophied than in individuals with normal cardiovascular anatomy. This study aimed to compare two methods ...
Bauman Glenn - - 2008
Physiologic variations in ventricular volumes could have important implications for treating patients with peri-ventricular brain tumors, yet no data exist in the literature addressing this issue. Daily megavoltage computed tomography (CT) scans in a patient with neurocytoma receiving fractionated radiation revealed minimal changes, suggesting that margins accounting for ventricular deformation ...
Christiansen Stefan - - 2008
OBJECTIVE: The aim of this study was the development of an experimental cardiomyopathy induced with Adriamycin (Pharmacia & Upjohn, Erlangen, Germany) with selective toxic damage of the left ventricular myocardium that avoided an ischemic component. METHODS: An intracoronary catheter was implanted directly into the left main stem in pigs and ...
Balderrábano-Saucedo Norma A NA Departamento de Cardiología, Hospital Infantil de México Federico Gómez, Mexico DF, - - 2008
Lifetime prognosis following successful repair of aortic coarctation can be affected by a number of late complications. The objective of this study was to assess left ventricular function in these patients and to identify factors that predispose to functional abnormalities. The study involved patients who had undergone repair of aortic ...
Saura Daniel D Servicio de Cardiología, Hospital Universitario Virgen de la Arrixaca, Murcia, - - 2008
Although aortic regurgitation is a diastolic phenomenon, it has been observed during systole in a few cases. Our aims were to determine the incidence of systolic aortic regurgitation in routine clinical practice and to investigate the clinical profiles of patients with the condition. An exhaustive prospective study of all investigations ...
Vogelsang T W - - 2008
The aim of the present investigation was to examine how 8 weeks of intense endurance training influenced right and left ventricular volumes and mass in obese untrained subjects. Ten overweight subjects (19-47 years; body mass index of 34+/-5 kg/m(2)) underwent intensive endurance training (rowing) three times 30 min/week for 8 ...
Arráez-Aybar L A - - 2008
AIMS: We performed a morphometric study of cardiac development on human embryos to complement the scarce data on human embryonic cardiac morphometry and to attempt to establish, from these, algorithms describing cardiac growth during the second month of gestation. METHODS: Thirty human embryos from Carnegie stages 15-23 were included in ...
El-Menyar Ayman A - - 2007
Detection of subclinical myocardial involvement is of utmost importance in risk stratification and prognosis; the role of ejection fraction in the detection of subclinical disease may be unhelpful. Our aim was to evaluate the methodology and importance of early detection of myocardial involvement in the presence of normal ejection fraction. ...
Koskenvuo Juha W - - 2007
BACKGROUND AND AIM: We evaluated a value of Qp/Qs (left-to-right shunt measurement) using volumetric cardiac magnetic resonance (CMR) cardiac output (CO) measurements. We defined intraobserver, interobserver variability and reproducibility of left and right ventricular parameters by CMR. Furthermore, we studied whether shortened acquisition time has an effect on the accuracy ...
Senju Norihiko - - 2007
Anthracyclines are antineoplastic agents that are effective against solid tumors and hematological malignancies. However, drug-induced cardiotoxicity imposes dose limitations. Myocardial damage due to anthracyclines has been assessed by measuring left ventricular ejection fraction (LVEF) or fraction shortening (FS) by echocardiography and criteria for discontinuing treatment have been established based on ...
Lamia Bouchra - - 2007
OBJECTIVE: Echocardiographic recording of the tricuspid annular plane systolic excursion (TAPSE) has been recommended for assessing right ventricular function in cardiac patients. The ability of TAPSE to reflect right ventricular function at baseline and to monitor acute changes in right ventricular function was tested in critically ill patients. DESIGN: Prospective ...
Tulumbaci Onder - - 2007
OBJECTIVE: Preterm delivery is a leading cause of perinatal mortality and morbidity. The aim of this study was to determine the effect of ritodrine hydrochloride, used for tocolysis and having serious cardiovascular side effects, on echocardiographic parameters. METHODS: Sixty-two pregnant women were included in our study. The study and control ...
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