Search Results
Results 451 - 500 of 2196
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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 ...
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 ...
Mansjoer Arif - - 2007
AIM: to determine the correlation between free thyroid hormone level and left ventricular ejection fraction in newly diagnosed Graves' patients. METHODS: this is a preliminary study with an initial cross-sectional design using free thyroxine level as a parameter of thyroid hormone state and left ventricular ejection fraction (LVEF) as a ...
Müller Hajo - - 2007
AIM: Two-dimensional echocardiography may not correctly indicate size in nonspherical atria. The present study compares different parameters of left atrial size evaluated by standard two-dimensional echocardiography with left atrial volume measured using three-dimensional echocardiography (3DE). METHODS AND RESULTS: One hundred seventy consecutive patients with a history of atrial arrhythmias were ...
Daimon M - - 2007
AIM: Left atrial plication is occasionally performed to reduce the size of the left atrium. We present our new method of evaluating the effect of plication on giant left atrium. METHODS: Respiratory and cardiac function were evaluated before and after left atrial plication in 8 patients with giant left atrium. ...
Chuen Marie Jennyfer Ng Kam - - 2007
The application of biomarker technology can be usefully implemented in areas where current techniques are inadequate and where a clinical issue, which affects outcome, can be defined. The definition of the loading status of the heart where there is pre-existent impairment of contractile function is a key target. Heart failure ...
Mark Dustin G - - 2007
BACKGROUND: Bedside transthoracic echocardiography (TTE) performed by emergency physicians (EPs) is valuable in the rapid assessment and treatment of critically ill patients. We sought to determine the preferred cardiac window for left ventricular ejection fraction (LVEF) estimation by EP sonographers in a critically ill patient population. METHODS: Prospective investigator-blinded study ...
Li Fang - - 2008
Real-time three-dimensional (3D) echocardiography (RT-3DE) has emerged as a new technique in measuring left atrial and ventricular volume. However, the impact of cutting planes of RT-3DE on the accuracy of volume measurement in patients with a normal or enlarged heart is still unknown. We enrolled 30 normal subjects (control group) ...
Binkley Philip F - - 2008
BACKGROUND: This investigation was designed to identify clinical variables associated with recovery of normal ventricular function in patients with dilated cardiomyopathy treated with medical therapy. Recovery of normal ventricular function with medical treatment of patients with dilated cardiomyopathy is observed with increasing frequency. However, the clinical variables associated with such ...
Andersen Niels Holmark - - 2008
OBJECTIVE: We sought to assess changes in the left ventricular systolic and diastolic function in patients with antecedent hypertension and an acute myocardial infarction. METHODS: A group of 38 patients with antecedent hypertension and acute myocardial infarction were compared with an age-matched nonhypertensive control group. There was a 30-day follow-up. ...
George Shane J - - 2007
BACKGROUND: Heart positioning during beating heart surgery produces significant haemodynamic compromise either when a deep pericardial stitch (DPS) or apical suction devices (ApSDs) are used. In this study the two techniques' haemodynamic performance and effect on intracardiac structures were compared through transoesophageal echocardiography (TEE) obtained volume measurements and three-dimensional ventricular ...
Bansal Darpan - - 2008
OBJECTIVE: To compare global Left Ventricular (LV) systolic function assessment by 16-detector row Computed Tomography (MDCT) with Two-Dimensional Standard Echocardiography (2DSE) in a routine cardiology practice setting and to ascertain the degree of correlation between LV volumes and measurements obtained by 2DSE with those measured by MDCT. METHODS: In 52 ...
Wei Chia-Ling - - 2007
In order for the conductance catheter system to accurately measure instantaneous cardiac blood volume, it is necessary to determine and remove the contribution from parallel myocardial tissue. In previous studies, the myocardium has been treated as either purely resistive or purely capacitive when developing methods to estimate the myocardial contribution. ...
Grothues Frank - - 2007
PURPOSE: To compare balanced steady-state free precession (SSFP) and segmented fast low angle shot (FLASH) for quantification of left and right ventricular volumes and function and for left ventricular mass at high field (3 Tesla). MATERIALS AND METHODS: A total of 33 patients (19 male, mean age 54 years) with ...
Ogawa Mitsugu - - 2007
Preoperative delayed-enhanced magnetic resonance imaging (DE-MRI) was performed to estimate myocardial viability in a 57-year-old man with ischemic cardiomyopathy in order to decide the best course of treatment. The patient was diagnosed as having congestive heart failure with triple-vessel involvement (ejection fraction of 7%, end-diastolic volume index of 160 ml/m2, ...
Matsui Hikoro - - 2007
Multidetector-row computed tomography (MDCT) of the heart is a new diagnostic approach for the quantitative evaluation of the coronary artery in adults. However, in children, the quantitative analysis of each cardiac chamber has not been established. We attempt to clarify the feasibility and validation of ECG-gated MDCT as a quantitative ...
Watson Denny D - - 2007
Measurement of regional myocardial tracer concentration after stress and at rest allows the establishment of normal standards for myocardial perfusion and reversibility and provides a reference from which to determine disease severity and change in response to treatment. Using the partial-volume effect, we can also conveniently estimate regional myocardial thickening ...
Colucci Wilson S - - 2007
BACKGROUND: There are no randomized, controlled trial data to support the benefit of beta-blockers in patients with asymptomatic left ventricular systolic dysfunction. We investigated whether beta-blocker therapy ameliorates left ventricular remodeling in asymptomatic patients with left ventricular systolic dysfunction. METHOD AND RESULTS: Patients with left ventricular ejection fraction <40%, mild ...
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