Search Results
Results 601 - 650 of 2328
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Apostolakis Efstratios E - - 2009
Left ventricular diastolic dysfunction (DD) is defined as the inability of the ventricle to fill to a normal end-diastolic volume, both during exercise as well as at rest, while left atrial pressure does not exceed 12 mm Hg. We examined the concept of left ventricular diastolic dysfunction in a cardiac ...
Manouras Aristomenis - - 2009
Echocardiographic measurements of left ventricular (LV) myocardial displacement may produce different results depending on the choice of employed modality and subjective adjustments during data acquisition and analysis. In this study, left ventricular longitudinal systolic displacement was quantified in 57 patients (31 women and 26 men, 50 +/- 16 years) using ...
Larsson Matilda - - 2009
Cardiac time intervals have been described as a measure of cardiac performance, where prolongation, shortening and delay of the different time intervals have been evaluated as markers of cardiac dysfunction. A relatively recently developed method with improved ability to measure cardiac events is Tissue Doppler Imaging (TDI), allowing accurate measurement ...
Rosato Edoardo - - 2009
The incidence of left ventricular (LV) diastolic dysfunction is increased in systemic sclerosis (SSc), while systolic dysfunction is present in a small percentage of patients. The aim of this study was to asses the LV "regional" diastolic abnormalities in SSc patients by the mean of Doppler tissue imaging (DTI). Echocardiographic ...
Gulel Okan - - 2009
Evaluation of atrial function has received less attention than that of the ventricle although normal atrial function is required for optimal overall cardiac function. Obesity is associated with increased cardiovascular morbidity and mortality. In this study, we compared left atrial functions in obese adults (body mass index = BMI >or=30 ...
Aburawi Elhadi H - - 2009
BACKGROUND: Treating pulmonary valve stenosis with balloon valvuloplasty (BV) is a good model to study the effect of right ventricular (RV) pressures on coronary flow. METHODS: Transthoracic Doppler echocardiography was used to register coronary flow in 10 age-matched healthy controls and 7 neonates before and 1 day after BV. RESULTS: ...
Bezante Gian P - - 2009
Renal dysfunction is relatively common in patients with primary hypertension (PH). A reduction in coronary vasodilator capacity has recently been reported in patients with renal damage undergoing coronary angiography. We investigated the relationship between coronary flow reserve (CFR) and early renal abnormalities in patients with PH and normal serum creatinine. ...
Sganzerla Paolo - - 2008
OBJECTIVE: The aim of this study was to elucidate the role of coronary microvascular function in the pathophysiological scenario of Takotsubo cardiomyopathy. METHODS: Noninvasive evaluations of coronary flow reserve through transthoracic Doppler ultrasound imaging of the left anterior descending coronary artery, a reliable marker of coronary microcirculation performance in the ...
Jurcut Ruxandra - - 2008
OBJECTIVE: Cardiac toxicity remains an important side effect of anthracyclines. New drug formulations (eg, pegylated liposomal doxorubicin [PL-DOX]) seem to be a successful strategy for reducing it. Changes in cardiac function induced by early chemotherapy, however, are subtle and difficult to quantitate by conventional imaging methods. Doppler myocardial imaging-based velocity, ...
Zhang Qinyyang - - 2008
This study evaluated the application of quantitative tissue velocity imaging (QTVI) in assessing regional myocardial systolic and diastolic functions in dogs with acute subendocardial ischemia. Animal models of subendocardial ischemia were established by injecting microspheres (about 300 microm in diameter) into the proximal end of left circumflex coronary artery in ...
Castelvecchio Serenella - - 2008
BACKGROUND: Limited data are available on left ventricle (LV) diastolic function in patients with ischemic dilated cardiomyopathy submitted to surgical ventricular restoration (SVR). The purpose of this study was to assess postoperative diastolic function changes and identify potential predictors of its worsening. METHODS: One hundred and forty-six patients (65 +/- ...
Zhang Li - - 2008
Transthoracic echocardiographic characteristics of 17 cases of cardiac amyloidosis (CA), a rare disease in China, were analyzed in order to improve the understanding of the disease. Seventeen cases of biopsy-proven CA, admitted to Wuhan Union Hospital from June 1994 to September 2008 were retrospectively reviewed. Twenty normal volunteers served as ...
Aneq Meriam Aström - - 2008
AIM: To study patients with arrhythmogenic right ventricular cardiomyopathy (ARVC) and describe different echocardiographic parameters and their change over time during almost 10 years follow-up period. METHODS: Fifteen patients (9 male, 6 female), aged 22-58 years (mean 40) with a diagnosis of ARVC, were followed up for a period of ...
Patrianakos Alexandros P - - 2009
AIMS: Patients with heart failure (HF) show abnormal arterial stiffening. METHODS AND RESULTS: We examined 60 patients (52.1 +/- 12, 8 years) with non-ischaemic dilated cardiomyopathy (NIDC), New York Heart Association II-III, in sinus rhythm, left ventricular ejection fraction 30.1 +/- 8.6%, and 44 normals. All subjects underwent an echocardiographic ...
Rijzewijk Luuk J - - 2008
OBJECTIVES: The purpose of this study was to compare myocardial triglyceride content and function between patients with uncomplicated type 2 diabetes mellitus (T2DM) and healthy subjects within the same range of age and body mass index (BMI), and to study the associations between myocardial triglyceride content and function. BACKGROUND: T2DM ...
Soylu Ahmet - - 2009
BACKGROUND: Cardiac structural changes have been reported to be more prominent in nondipper normotensives than the dipper ones. But the influence of nondipping status on cardiac diastolic functions of normotensives has not been studied yet. In this study, we investigated the effect of nondipping status on both cardiac structural changes ...
Søfteland Sandvei Marie - - 2008
Objectives. Previous reports suggest that left ventricular function changes during the course of a subarachnoid haemorrhage. The aim of this study was to evaluate left ventricular function with tissue Doppler echocardiography at two timepoints during the acute phase of a subarachnoid haemorrhage. Design. Eighteen consecutive patients (median 52 years, range ...
Diller Gerhard-Paul - - 2009
BACKGROUND: The aim of this study was to determine the impact of percutaneous coronary intervention (PCI) on myocardial function assessed by tissue Doppler echocardiography. METHODS: Myocardial tissue peak velocities were recorded at the lateral, septal, posterior, and inferior angles of the mitral annulus as well as at the lateral tricuspid ...
Sürücü Hüseyin - - 2009
OBJECTIVE: We aim to evaluate subepicardial and subendocardial left ventricular (LV) functions in patient single coronary artery lesion at early stage after percutaneous coronary intervention (PCI). Additionally, a comparison of LV functions between patients and control cases was aimed. METHOD: Patients with culprit left anterior descending (LAD) lesion (n = ...
Zeng Shi - - 2009
OBJECTIVE: To assess the left ventricular (LV) longitudinal systolic and diastolic function in patients with dilated cardiomyopathy (DCM) by syngo Velocity Vector Imaging (VVI). Methods: Digital dynamic images of 30 DCM patients and 30 healthy subjects were collected; then the longitudinal velocity, strain, and strain rate were measured in systolic ...
Oberhoffer R - - 2009
To date, Doppler myocardial imaging (DMI) is no longer an intriguing new research tool only, but is rather on the verge of becoming a routinely used diagnostic method in adult and pediatric cardiology. Clinical studies have proven its diagnostic relevance for global left and right ventricular function. Concerns about reliability ...
Kepez Alper - - 2009
BACKGROUND: There is limited information regarding myocardial alterations in patients with obstructive sleep apnea syndrome (OSAS) in the absence of pulmonary and cardiac comorbidity. In this study, we aimed to evaluate potential myocardial alterations of these patients and investigate the possible effects of OSAS-related pathological variations on left and right ...
Pattoneri Paolo - - 2009
AIM: Tissue Doppler echocardiography was investigated for its applicability in detecting subtle myocardial involvement in multiple sclerosis patients receiving a low dose of mitoxantrone. METHODS AND RESULTS: Twenty Caucasian patients with multiple sclerosis (mean age 43.9+/-9.3 years, 12 males and 8 females) treated with mitoxantrone (mean cumulative dose 35.4+/-21.6 mg/m(2)), ...
Manouras Aristomenis - - 2009
AIMS: Colour tissue Doppler (TD) has been reported to underestimate the longitudinal myocardial motion velocities measured with spectral TD. This study evaluates the effect of temporal smoothing and offline gain settings on the results of velocity measurements with these two methods and the difference between them. METHODS AND RESULTS: In ...
Fenstermaker Bernadette - - 2008
OBJECTIVE: The hybrid procedure is an alternative for initial palliation for patients with hypoplastic left heart syndrome. No echocardiographic data exist for the interstage (IS) period. The goal of this study was to describe the echocardiographic changes during this period. METHODS: A chart review was performed on patients discharged from ...
von Bibra Helene - - 2008
The effects of thiazolidinediones on cardiac function are controversial in humans with type 2 diabetes (T2DM) and in animals. Given the high prevalence and prognostic relevance of diastolic myocardial dysfunction in T2DM, we tested the hypothesis that by reducing oxidative stress rosiglitazone, but not glimepiride, may improve diastolic function. This ...
Mele Donato - - 2008
OBJECTIVE: To verify whether myocardial impairment can be detected by tissue Doppler imaging (TDI) in patients with asymptomatic systemic sclerosis (SSc), 35 patients with SSc with normal left ventricular (LV) ejection fraction and 35 control subjects were studied. METHODS: Myocardial longitudinal peak systolic velocity, strain, and strain rate (SR) were ...
Khan Faisel - - 2008
Vascular dysfunction in the coronary and peripheral circulations is an early prognostic marker of future cardiovascular events. Measurements of coronary and peripheral vascular function in resistance vessels can be made, but rely on invasive procedures, which make them unsuitable for routine application. An assessment of the direct correlation between vascular ...
Lorch Steven M - - 2008
OBJECTIVE: We aimed to evaluate myocardial strain and strain rate (SR) by novel 2-dimensional speckle tracking echocardiography in a large pediatric cohort (1) to establish their normal values and (2) to discern the influence of maturation and cardiac growth on them. METHODS: Echocardiograms of 284 consecutive subjects of a healthy ...
Furlund Owe Jone - - 2008
Myasthenia gravis (MG) primarily affects skeletal muscles, but influence on cardiac function has been suggested. The aim of this study was to assess left ventricular long-axis function in MG patients compared to healthy controls, and to examine whether any MG-related heart involvement was influenced by the acetylcholine-esterase inhibitor pyridostigmine. We ...
Mynard Jonathan P - - 2008
Precise identification of end-diastole (ED), corresponding to the end of diastole and start of systole, is crucial for accurate assessment of cardiac function. The aims of this study were to develop a new algorithm based on peak curvature (kappa(p)) for detecting ED as a "corner" in left ventricular pressure (LVP) ...
Burri Manjula V - - 2008
Five adult patients with Takotsubo cardiomyopathy (TC) diagnosed by usual criteria were studied with velocity vector imaging (VVI) on admission and at follow-up, when their LV function had improved, as assessed by 2D TTE wall-motion score (WMS) index. Averaged peak segmental longitudinal strain (S) in systole, and velocity (V) and ...
Kindermann Michael - - 2008
Heart failure with a normal ejection fraction (HFNEF) is a common clinical problem with many unsolved questions regarding pathophysiology, diagnosis, and therapy. Although the term diastolic heart failure has been abandoned, diastolic left ventricular (LV) dysfunction together with combined systolic ventricular and arterial stiffening are considered to be the main ...
Mohan Jagdish C - - 2008
In daily practice, Tissue Doppler Echocardiography (TDI) is used to estimate left ventricular filling pressures, categorize diastolic dysfunction, identify patients with heart failure (HF) with normal ejection fraction, differentiate constrictive pericarditis from restrictive cardiomyopathy, to prognosticate acute coronary syndrome, valvular heart disease syndrome of HF etc, correlate exercise capacity and ...
Zheng Dingchang - - 2008
Ectopic beats are common in patients who have heart disease and are associated with reduced peripheral pulse amplitude. This study determined the start of the peripheral pulse increase and from it the opening of the aortic valve. The left ventricular peak filling rate was also estimated from the peripheral pulse. ...
Simpson Kerry E - - 2009
Pulsed-wave Doppler tissue imaging (pw-DTI) techniques allow the non-invasive assessment of myocardial dynamics. pw-DTI has demonstrated regional and global diastolic impairment in various forms of human and feline cardiomyopathy. We hypothesise that in geriatric cats with systemic diseases that have been linked to specific cardiomyopathies in human beings, the myocardial ...
Turiel Maurizio - - 2009
BACKGROUND: In renal transplant recipients (RTR) an increased risk to develop cardiovascular injury is present. Transthoracic Doppler echocardiographic assessment of coronary flow velocity reserve (CFVR), a sensitive and minimally invasive technique, was recently employed to detect both macrovascular and microvascular coronary artery disease (CAD) in different clinical settings. The prevalence ...
Akar Bayram Nihal - - 2009
AIMS: In this study, we aimed to assess left ventricular (LV) systolic and diastolic functions by tissue Doppler imaging (TDI) in patients with obstructive sleep apnoea syndrome (OSAS) and to investigate the effects of 6 month continuous positive airway pressure (CPAP) on LV systolic and diastolic functions. METHODS AND RESULTS: ...
Jarnert Christina - - 2008
Left ventricular (LV) diastolic dysfunction (DD) is diagnosed by Doppler echocardiography (DE) and Tissue Doppler imaging (TDI). Velocity vector imaging (VVI) evaluates myocardial deformation (strain). We studied left atrial (LA) deformation and volumes by VVI in relation to established Doppler-derived indices of LV diastolic function in diabetic patients. Using DE ...
Kutty Shelby - - 2008
BACKGROUND: This study evaluated regional right ventricular (RV) mechanics before and after pulmonary valve replacement (PVR) by ultrasonic speckle tracking technology using velocity vector imaging (VVI). METHODS: Fifty-eight patients who underwent PVR (May 1999 to August 2007) were included. Two-dimensional Doppler indices included qualitative pulmonary incompetence, RV outflow tract peak ...
Nishio Mayu - - 2008
Clinical characteristics were compared between hypertensive patients with and without heart failure in the absence of reduced ejection fraction (EF) to gain insights into the effects of renal insufficiency on the prevalence of diastolic heart failure. Study subjects consisted of 691 hypertensive patients with an EF>40%. Patients with serum creatinine ...
Toiviainen-Salo Sanna - - 2008
BACKGROUND: Early studies have suggested increased risk of fatal cardiac complications in infants with Shwachman-Diamond syndrome (SDS), an inherited bone marrow failure syndrome. Patients undergoing stem cell transplantation (STC) have appeared susceptible to organ toxicity, including cardiac involvement. PROCEDURE: This study assessed anatomical and functional features of the heart in ...
Zhang Wen W Department of Physiology, Anatomy and Genetics, Sherrington Building, University of Oxford, Oxford, - - 2008
Patients with muscular dystrophy have abnormal cardiac function and decreased high-energy phosphate metabolism. Here, we have determined whether the 8 month old mdx mouse, an animal model of muscular dystrophy, also has abnormal cardiac function and energetics. In vivo cardiac MRI revealed 33% and 104% larger right ventricular end-diastolic and ...
Westholm Carl - - 2009
BACKGROUND: The use of two-dimensional echocardiography (2D echo) for detection of ischaemia is limited due to high user dependency. Longitudinal motion is sensitive for ischaemia and usable for quantitative measurement of longitudinal myocardial function but time consuming. Velocity tracking (VeT) is a new method that gives an easy three-dimensional understanding ...
Saito M - - 2009
Left ventricular (LV) untwisting velocity has emerged as a novel index of LV diastolic function since it is thought to be related to LV diastolic suction. However, the pathophysiology of LV untwisting behavior has not been fully investigated. The aim of this study was to investigate the determinants of LV ...
Marsan Nina Ajmone - - 2008
Velocity-encoded magnetic resonance imaging (VE-MRI), commonly used to perform flow measurements, can be applied for myocardial velocity analysis, similar to tissue Doppler imaging (TDI). In this study, a comparison between VE-MRI and TDI was performed for the assessment of left ventricular dyssynchrony and left ventricular filling pressures. Ten healthy volunteers ...
Bayram Nihal Akar - - 2008
OBJECTIVES: The effects of continuous positive airway pressure (CPAP) therapy on right ventricular (RV) function in patients with obstructive sleep apnea syndrome (OSAS) has not been previously studied by tissue Doppler imaging (TDI). The aim of this study was to assess RV function using TDI in patients with OSAS before ...
Soylu Ozer - - 2008
BACKGROUND: Conventional noninvasive methods have well-known limitations for the detection of coronary artery disease (CAD) in patients with left bundle branch block (LBBB). However, advancements in Doppler echocardiography permit transthoracic imaging of coronary flow velocities (CFV) and measurement of coronary flow reserve (CFR). Our aim was to evaluate the diagnostic ...
Tashiro Hideki - - 2008
The aim of this study was to evaluate the left ventricular (LV) diastolic function parameter calculated using three-dimensional (3D) echocardiography. METHOD: Using 3D echocardiography and an analysis software program, the left ventricular volume through the cardiac cycle was measured automatically. We therefore calculated 25%, 50%, and 75% of the subtraction ...
Karakurt Cem┼čit - - 2008
Although the anthracyclines have gained widespread use in the treatment of childhood hematological malignancies and solid tumors, cardiotoxicity is the major limiting factor in the use of anthracyclines. The aim of this study was to assess the mitral annular displacement by tissue tracking in pediatric malignancy survivors who had been ...
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