Search Results
Results 351 - 400 of 2213
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Hovnanian André L - - 2010
To determine long-term survival, identify preoperative factors predictive of a favorable outcome, and assess functional improvement after coronary artery bypass grafting in patients with advanced left ventricular dysfunction. Between 1995 and 2001, 244 patients who underwent coronary artery bypass grafting and had a preoperative left ventricular ejection fraction less than ...
Shahgaldi Kambiz - - 2010
Three dimensional echocardiography (3DE) approaches the accuracy of cardiac magnetic resonance in measuring left ventricular (LV) volumes and ejection fraction (EF). The multibeat modality in comparison to single-beat (SB) requires breath-hold technique and regular heart rhythm which could limit the use of this technique in patients with atrial fibrillation (AF) ...
Carpenter John-Paul JP Cardiovascular MR Unit, Royal Brompton Hospital, London, London, - - 2010
We aimed to define reference ranges for right ventricular (RV) volumes, ejection fraction (EF) in thalassemia major patients (TM) without myocardial iron overload. RV volumes, EF and mass were measured in 80 TM patients who had no myocardial iron overload (myocardial T2* > 20 ms by cardiovascular magnetic resonance). All ...
Flores-Marín Ana A Unidad del Corazón, Servicio de Cardiología y Cirugía Cardiaca, Hospital Universitario Virgen de la Victoria, Málaga, - - 2010
At present, surgery is the only recommended effective treatment for severe aortic stenosis. However, the surgical risk is increased when left ventricular dysfunction is present. The aim of this study was to identify predictors of postoperative and longterm mortality and functional improvement after valve replacement in patients with severe aortic ...
Muraru Denisa - - 2010
AIMS: To assess the accuracy and reproducibility of a novel automated software for left ventricular (LV) volumes and ejection fraction (EF) measurements using real-time three-dimensional echocardiography (3DE). METHODS AND RESULTS: A total of 103 patients with a wide range of LV volumes were analyzed with both 4D AutoLVQ and 4D ...
Yilmaz Mehmet Birhan - - 2011
CA-125 is an old marker, recently shown to be associated with systolic heart failure. We aimed to search for factors influencing its plasma level. 430 patients with one available CA-125 level were investigated retrospectively. 150 patients who had echocardiographic records were enrolled into final analysis. Patients were followed up, hospitalization ...
Ajami Gholamhossein - - 2010
Myocarditis is a well-recognized component of Kawasaki disease, with left ventricular dysfunction occurring in more than half of the patients during the acute phase of the disease. The purpose of our study was to evaluate myocardial function in these patients using the myocardial performance index, also known as the Tei ...
Waksman Ron - - 2009
Advances in coronary stent technology, including refinement of the stent alloy, strut thickness, stent geometry, passive coating, and drug elution, have dramatically enhanced the safety and efficacy of percutaneous coronary intervention (PCI) with stenting. Stents are currently used in over 90% of coronary interventions and the use of drug-eluting stents ...
Vieira Marcelo L C - - 2010
AIMS: To investigate by real-time 3D echocardiography (RT3DE) and cardiac computed tomography (CCT) the analysis of left ventricle ejection fraction (LVEF) and volumes. METHODS AND RESULTS: A total of 67 patients (37 males, 55 +/- 11 years) were studied prospectively by RT3DE and by 64-slice CCT. RT3DE data: LVEF ranged ...
Männer Jörg - - 2009
The cardiac cycle-related deformations of tubular embryonic hearts were traditionally described as concentric narrowing and widening of a tube of circular cross-section. Using optical coherence tomography (OCT), we have recently shown that, during the cardiac cycle, only the myocardial tube undergoes concentric narrowing and widening while the endocardial tube undergoes ...
Menezes Leon J - - 2009
OBJECTIVE: Left ventricular function is prognostically important. Our aim was to validate different algorithms' measurements with rubidium-82 PET, using computed tomography (CT) acquired simultaneously on hybrid imaging. METHODS: Fifty patients (33 men, 17 women, mean age 59 years SD 12) referred for coronary artery disease evaluation underwent rubidium-82 PET myocardial ...
Michaux Isabelle - - 2010
OBJECTIVE: Myocardial performance index, the sum of the 2 isovolumic times divided by the ejection time, contains information on global systolic and diastolic function. This study was performed to determine the feasibility of right ventricular myocardial performance index measurements if measured by transesophageal echocardiography in patients under general anesthesia and ...
Ugander Martin - - 2010
Fractional shortening (FS) by echocardiography is considered to represent the short-axis contribution to the stroke volume (SV), also called short-axis function. However, FS is mathematically coupled to the amount of myocardium, since it rearranges during atrioventricular plane displacement (AVPD). The SV is the sum of the volumes generated by 1) ...
Geerlings Mirjam I - - 2010
OBJECTIVE: To estimate brain volumes, white matter lesion (WML) volume and asymptomatic infarcts on MRI in a large cohort of patients with atherosclerotic disease. METHODS: Within the SMART-MR (Second Manifestations of ARTerial disease-Magnetic Resonance) study, a prospective cohort study on determinants and course of brain changes on MRI, cross-sectional analyses ...
Keenan Niall G - - 2009
OBJECTIVE: This study was undertaken to evaluate the value of cardiovascular magnetic resonance (CMR) in the assessment of patients with Takayasu arteritis (TA). METHODS: Sixteen patients with TA and 2 populations comprising 110 normal volunteers were prospectively recruited. All patients with TA underwent a CMR protocol including measurement of carotid ...
Simonot D L - - 2009
The 34% increase in relative ventricular mass (Mrv) resulting from chronic anaemia (induced by an intraperitoneal injection of phenylhydrazine hydrochloride) was accompanied by a 117% increase in coronary vascular volume of diploid rainbow trout Oncorhynchus mykiss. Coronary vascular volume of normocythemic triploid fish was similar to that of normocythemic diploid ...
Hein Marc - - 2009
OBJECTIVE: To evaluate the accuracy of right ventricular ejection fraction and right ventricular end-diastolic volume obtained by volumetric pulmonary artery catheter, using the conductance catheter as reference method. DESIGN: Prospective, comparative study. SETTING: Research laboratory of a university hospital. SUBJECTS: Seven young female German landrace pigs. INTERVENTIONS: Ligation of the ...
Jabot Julien - - 2009
OBJECTIVE: To test whether cardiac function index could actually behave as an indicator of left ventricular systolic function by testing if 1) it increased with inotropic stimulation; 2) it was not altered by fluid loading; 3) it correlated with the echographic left ventricular ejection fraction, considered as the clinical gold ...
Kino Aya - - 2009
OBJECTIVE: The purpose of this study was to evaluate a new free-breathing 3D phase-sensitive inversion-recovery (PSIR) turbo FLASH pulse sequence for the detection of left ventricular myocardial scar. SUBJECTS AND METHODS: Patients with suspected myocardial scar were examined on a 1.5-T MR scanner for myocardial late enhancement after the administration ...
Punn Rajesh - - 2010
BACKGROUND: Echocardiography has been used to diagnose and describe left ventricular noncompaction (LVNC). No other study has investigated LVNC using the 16-segment model described by the American Heart Association and the American Society of Echocardiography in children, some of whom have congenital heart disease. Using the ratio of noncompaction to ...
Wilson M - - 2011
Objectives Seventeen male participants (mean (SD) (range): age 33.5 (6.5) years (46-26 years), body mass 80 (9.2) kg (100-63 kg), height 1.81 (0.06) m (1.93- 1.70 m)) ran a marathon to investigate the relationship between systolic function (using cardiac magnetic resonance (CMR)) and diastolic function (using echocardiography) against biomarkers of ...
Hurwitz Barry E - - 2010
The study examined whether deficits in cardiac output and blood volume in a CFS (chronic fatigue syndrome) cohort were present and linked to illness severity and sedentary lifestyle. Follow-up analyses assessed whether differences in cardiac output levels between CFS and control groups were corrected by controlling for cardiac contractility and ...
Seeger Achim - - 2009
BACKGROUND: Patients with congenital heart disease frequently have complex cardiac and vascular malformations requiring detailed non-invasive diagnostic evaluation including functional parameters. OBJECTIVE: To evaluate the morphological and functional information provided by a novel 3-D cine steady-state free-precession (SSFP) sequence. MATERIALS AND METHODS: Twenty consecutive children (mean age 2.2 years, nine ...
Hamill Neil - - 2009
The objective of this study was to quantify the repeatability and reproducibility of fetal cardiac ventricular volumes obtained using spatiotemporal image correlation (STIC) and Virtual Organ Computer-Aided Analysis (VOCAL; GE Healthcare, Kretztechnik, Zipf, Austria). A technique was developed to compute ventricular volumes using the subfeature Contour Finder: Trace. Twenty-five normal ...
Jhanjee Rajat - - 2009
BACKGROUND: Clinical experience suggests that atrial tachyarrhythmias (ATs) are a frequent comorbidity in heart failure patients with left ventricular systolic dysfunction and that volume overload may increase AT susceptibility. However, substantiating this apparent relationship in free-living patients is difficult. Recently, certain implantable cardioverter-defibrillators provide, by measuring transpulmonary electric bioimpedance, an ...
De Vecchis Renato - - 2009
OBJECTIVE: To identify the Doppler echocardiographic criteria able to predict clinical deterioration of mild-to- moderate chronic heart failure (CHF) as well as, whenever possible, to evaluate the features of chronological relation of cavitary remodelling in left chambers during follow-up (FU). METHODS: A retrospective, case-controlled study, including a number of CHF ...
Peters Dana C - - 2009
To compare higher spatial resolution 3D late gadolinium enhancement (LGE) cardiovascular magnetic resonance (Cardiac MR) with 2D LGE in patients with prior myocardial infarction. Fourteen patients were studied using high spatial resolution 3D LGE (1.3 x 1.3 x 5.0 mm(3)) and conventional 2D LGE (2 x 2 x 8 mm(3)) ...
MacIver David H - - 2010
The mechanisms of heart failure are ill understood with multiple, heterogeneous hypotheses proposed to describe the condition. This study examines the individual effects of left ventricular hypertrophy, long-axis shortening and the effect of left ventricular remodeling on ejection fraction, end-diastolic volume and stroke volume using a mathematical model of left ...
Stahl Carsten - - 2009
BACKGROUND: Implantable device diagnostics may play an essential role in simplifying the care of heart failure patients by providing fundamental insights into their complex clinical patterns. Early recognition of heart failure progression by a continuous hemodynamic monitoring would allow for timely therapeutic interventions to prevent decompensation and hospitalization. In this ...
Beek A M - - 2010
Reperfusion may cause intramyocardial hemorrhage (IMH) by extravasation of erythrocytes through severely damaged endothelial walls. The purpose of the study was to evaluate the clinical significance of IMH in relation to infarct size, microvascular obstruction (MVO) and function in patients after primary percutaneous intervention. Forty-five patients underwent cardiovascular MR imaging ...
Ren Min - - 2009
OBJECTIVE: The purpose of this study was to evaluate the capability of real-time triplane echocardiography (RT3PE) for monitoring global and regional systolic function of the left ventricle (LV) after surgical revascularization and for evaluating the effect of surgery and predicting restenosis. METHODS: Forty-nine patients underwent RT3PE before and at 10 ...
Mor-Avi Victor - - 2009
PURPOSE OF REVIEW: The purpose of this review is to provide readers with an update on the latest developments and the current status of the real-time three-dimensional echocardiographic (RT3DE) quantitative evaluation of left ventricular volumes and function. RECENT FINDINGS: In recent years, the growing availability of RT3DE imaging technology, its ...
Geelhoed Miranda J J - - 2009
BACKGROUND: Echocardiographic measurements are widely used as outcomes of different studies. The aim of this study was to assess intraobserver and interobserver reliability of echocardiographic measurements in healthy children. MATERIALS AND METHODS: We studied 28 children, with a median age of 7.5 years, and inter-quartile range from 3 to 11 ...
Joffe Samuel W - - 2009
BACKGROUND: Left ventricular ejection fraction (EF) is an important parameter in the diagnosis and treatment of patients with coronary heart disease. Previous studies comparing echocardiography and contrast left ventriculography (CVG) for the measurement of EF have shown considerable variation in results, yet, in clinical practice, EF measurements are used interchangeably. ...
Lipiecki Janusz - - 2009
Dilation of end-systolic and end-diastolic volumes (ESV, EDV) has been used to define left ventricular remodelling after acute myocardial infarction (MI), but the prognostic significance of different enlargement patterns has not been evaluated fully. To analyse the evolution of left ventricular volumes and parameters of global and regional contractility and ...
Bundgaard-Nielsen M - - 2009
BACKGROUND: Cardiac function curves are widely accepted to apply to humans but are not established for the entire range of filling of the heart that can be elicited during head-up (HUT) and head-down tilt (HDT), taken to represent minimal and maximal physiological filling of the heart, respectively. With the supine ...
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 ...
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