Search Results
Results 401 - 450 of 2227
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Lopshire John C - - 2009
BACKGROUND: Spinal cord stimulation (SCS) reduces the incidence of ventricular tachyarrhythmias in experimental models. This study investigated the effects of long-term SCS on ventricular function in a postinfarction canine heart failure model. METHODS AND RESULTS: In stage 1, dogs underwent implantable cardioverter-defibrillator implantation and embolization of the left anterior descending ...
Uittenbogaard Lukas B - - 2009
OBJECTIVE: The purpose of this study was to prospectively assess the clinical feasibility of an automated 3-dimensional (3D) software tool for extended basic cardiac screening in routine ultrasound practice. METHODS: During the 2-month study period, all gravidas fitting our inclusion criteria were consecutively included. Cardiac 3D volumes were acquired within ...
Erdo─čan Ilkay - - 2009
We performed a study to examine the clinical use of carvedilol, its dosage and its effects on systolic functions in children. Twenty-one patients with dilated cardiomyopathy who were treated with carvedilol adjacent to standard heart failure therapy were enrolled in the study. Echocardiographic assessment was obtained before and during carvedilol ...
Adamson Louise - - 2009
A best evidence topic in cardiac surgery was written according to a structured protocol. The question addressed was whether pulmonary valve replacement (PVR) after repair of tetralogy of Fallot improved outcomes including right ventricular (RV) function. Altogether 730 relevant papers were identified using the below mentioned search, 19 papers represented ...
Kühl Jørgen Tobias - - 2010
Left atrial (LA) maximal volume contains prognostic information in patients with heart failure and acute myocardial infarction. However, only few studies have investigated the detailed mechanical function of the LA in these patients. We assessed the feasibility of evaluating LA volume and mechanical function with Multi Slice Computed Tomography (MSCT) ...
Omran Mohammad T - - 2009
OBJECTIVE: To evaluate left ventricular function by echocardiography before and after kidney transplantation (KT). METHODS: This analytical study included 50 patients that had successful KT in Shahid Beheshti Hospital, Babol, Iran from October 2005 to December 2007. The echocardiography study was performed by one cardiologist before and at least 3 ...
Lurz Philipp - - 2009
BACKGROUND: Treatment of right ventricular outflow tract obstruction is possible with a bare metal stent (BMS), although this treatment causes pulmonary regurgitation. In this study, we assessed the acute physiological effects of BMS versus percutaneous pulmonary valve implantation (PPVI) using an x-ray/magnetic resonance hybrid laboratory. METHODS AND RESULTS: Fourteen consecutive ...
Vörös Károly - - 2009
The aim of the study was to establish normal reference echocardiographic values for three Hungarian dog breeds, and to determine the potential dependence of intracardiac parameters on body weight, age and gender. M-mode and two-dimensional echocardiography were performed on 95 clinically healthy dogs including 45 Hungarian Vizslas, 28 Mudis and ...
Sud Sachin - - 2009
BACKGROUND: The omnibus Tei index, the sum of isovolumic contraction and relaxation times divided by the ejection time, is a good indicator of global cardiac function. However, these time intervals can be influenced by valvular heart disease and the role of the Tei index among patients with aortic stenosis (AS) ...
Shah Ravi V - - 2009
BACKGROUND: ST2, a biomarker of cardiomyocyte stretch, powerfully predicts poor outcomes in patients with acute dyspnea, but nothing is known about associations between soluble ST2 (sST2) and cardiac structure and function, or whether sST2 retains prognostic meaning in the context of such measures. METHODS AND RESULTS: One hundred thirty-four dyspneic ...
Yamamura Jin - - 2009
The aim of this study was to perform fetal cardiac magnetic resonance imaging (MRI) with triggering of the fetal heart beat in utero in a sheep model. All experimental protocols were reviewed and the usage of ewes and fetuses was approved by the local animal protection authorities. Images of the ...
Taheri Shahram - - 2009
We performed this study to assess whether low dose spironolactone could be administered in hemodialysis (HD) patients with moderate to severe heart failure to improve cardiovascular function and reduce hospitalization without inducing hyperkalemia. We enrolled 16 chronic HD patients with moderate to severe heart failure and left ventricle ejection fraction ...
Liang Jin-qian - - 2009
BACKGROUND: Patients with congenital scoliosis often also have intraspinal abnormalities and other organ defects, and few studies of the effects of congenital scoliosis on cardiac function and structure have been published. METHODS: A total of 215 adolescent patients with congenital scoliosis (average age, 13.58 years) underwent preoperative echocardiography and were ...
Magalang Ulysses J - - 2009
There are few data on the effects of continuous positive airway pressure (CPAP) therapy on the structural and functional characteristics of the right heart in patients with obstructive sleep apnea (OSA). We sought to leverage the advantages of cardiac magnetic resonance imaging (CMR) and hypothesized that CPAP treatment would improve ...
Toyooka Shinichi - - 2009
OBJECTIVE: The aim of this study was to evaluate right and left ventricular functions in patients with pulmonary arterial hypertension after living-donor lobar lung transplantation compared with those without hypertension. METHODS: Thirty-three recipients of living-donor lobar lung transplantation were divided into two groups: those with pulmonary arterial hypertension (PAH group; ...
Cowan Brett R BR Auckland MRI Research Group, University of Auckland, Auckland, New - - 2009
The ONTARGET and TRANSCEND clinical trials were designed to investigate the cardioprotective effects of telmisartan 80 mg and ramipril 10 mg, alone and in combination, in patients at high risk of cardiovascular disease. Cardiac MRI enables investigation of mechanistic effects of these agents on cardiac structural and functional variables. Here, ...
Furlani Ana Paula - - 2009
Therapeutic angiogenesis is currently under investigation in ischemic heart disease. We examined the effect on left ventricular function induced by therapeutic angiogenesis by intramyocardial injection of plasmid VEGF(165), in a canine model of chronic myocardial infarction. Left thoracotomy was performed in 10 mongrel dogs, and myocardial infarction induced by ligation ...
Doenst Torsten - - 2009
BACKGROUND: The efficacy of surgical ventricular reconstruction (SVR) for ischemic cardiomyopathy has never been truly quantified. Methods to assess ventricular flow have not been applied to these patients. The objective is to develop a volume-independent technique for assessing the effects of ischemic remodeling and SVR on left ventricular blood flow ...
Brown Morgan L - - 2009
BACKGROUND: Indications for valve replacement in patients with aortic regurgitation include diminished ejection fraction and increased left ventricular dimensions. Our objective was to examine the effect of preoperative ejection fraction and left ventricular dimensions on survival and return of normal systolic function (ejection fraction > or = 0.50) after valve ...
Lewis M M MM Department of Neurology, Pennsylvania State University, Milton S. Hershey Medical Center, Hershey, PA 17033-0850, - - 2009
A recent case report suggested the presence of asymmetrical lateral ventricular enlargement associated with motor asymmetry in Parkinson's disease (PD). The current study explored these associations further. Magnetic resonance imaging (3T) scans were obtained on 17 PD and 15 healthy control subjects at baseline and 12-43 months later. Baseline and ...
Ardekani Siamak S Institute for Computational Medicine, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA. - - 2009
Left ventricular remodeling during the development of heart failure is a strong predictor of cardiovascular mortality. However, methods to objectively quantify remodeling-associated shape changes are not routinely available but may be possible with new computational anatomy tools. In this study, we analyzed and compared multi-detector computed tomographic (MDCT) images of ...
Arques Stephane - - 2010
The present study attempted to determine the accuracy of left atrial volume (LAVi) by transthoracic echocardiography in the diagnosis of diastolic heart failure (DHF) in patients presenting with chronic, isolated dyspnea. We included 28 consecutive patients with a left ventricular ejection fraction >50% without prior history of heart failure. DHF ...
Mollema S A - - 2009
Echocardiography is useful for risk stratification and assessment of prognosis after myocardial infarction, which is the focus of this review. Various traditional echocardiographic parameters have been shown to provide prognostic information, such as left ventricular volumes and ejection fraction, wall motion score index, mitral regurgitation and left atrial volume. The ...
Leonard A D - - 2009
BACKGROUND: Urotensin II (UII) and its receptor UT are involved in control of the cardiovascular system and are implicated in heart failure. We measured UT expression by quantitative PCR (Q-PCR) in atrial and aortic tissue, and plasma UII while simultaneously assessing cardiac function in 40 patients undergoing coronary artery bypass ...
Kumar Anil - - 2009
In a prospective study, enhanced external counterpulsation (EECP) was performed for 1 hour each day for 35 days in 47 patients, mean age 61 +/- 8 years, with prior coronary revascularization who had chronic refractory angina pectoris despite antianginal drugs and who were not candidates for further coronary revascularization. Compared ...
Selton-Suty Christine - - 2009
The importance of right ventricular (RV) function in the clinical management of patients with cardiopulmonary disorders is now well recognized. However, due to both its shape and location and to the load dependence of its ejection fraction, accurate evaluation of its function is still a challenge. Echocardiography allows morphological, hemodynamic ...
Uittenbogaard L B - - 2009
OBJECTIVES: The goal of this study was to use spatiotemporal image correlation (STIC) to provide reference values for left and right ventricle volumes, and indices of fetal cardiac function. METHODS: In this prospective longitudinal study, STIC volumes were acquired periodically from 12 weeks of gestation onwards. The STIC volumes were ...
Song Ze-Zhou - - 2011
The patient was a 39-year-old man admitted with iterative severe chest distress and breathlessness associated with activity without chest complaint for eight years. In past, he was found to have cardiac murmur and was diagnosed congenital ASD at the time of his 25-year-old. Transthoracic two-dimensional echocardiography showed prominent trabeculations of ...
Mahabadi Amir A AA Cardiac MR PET CT Program, Department of Radiology and Division of Cardiology, Massachusetts General Hospital, 165 Cambridge Street, Suite 400, Boston, MA 02114, - - 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 CC Division of Cardiothoracic Surgery University of California, San Francisco and VA Medical Center, San Francisco, CA 94121, - - 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 ...
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