Search Results
Results 451 - 500 of 2329
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Clur S A - - 2010
Two fetuses with endocardial fibroelastosis, one with critical aortic stenosis and one with high-output cardiac failure due to chorioangiomatosis, are presented to evaluate the correlation between Doppler echocardiographic findings, the fetal clinical condition and the anatomical substrate found at postmortem. Doppler measurements of cardiac function (systolic, diastolic and global) and ...
Schattke Sebastian - - 2010
BACKGROUND: Isovolumetric acceleration (IVA) is a novel tissue Doppler parameter for the assessment of systolic function. The aim of this study was to evaluate IVA as an early parameter for the detection of right ventricular (RV) systolic dysfunction in patients with systemic sclerosis (SSc) without pulmonary hypertension. METHODS: 22 patients ...
Vitarelli Antonio - - 2010
RV performance is difficult to evaluate, given its geometry, interrelationship with the left ventricle, and sensitivity to alterations in pulmonary pressure. This article focuses on some of the challenges related to the assessment of RV function in the setting of the RV's unique anatomic, physiologic, conventional and newer echocardiographic aspects, ...
Germans Tjeerd - - 2010
BACKGROUND: Clinical data on myocardial function in HCM mutation carriers (carriers) is sparse but suggests that subtle functional abnormalities can be measured with tissue Doppler imaging before the development of overt hypertrophy. We aimed to confirm the presence of functional abnormalities using cardiovascular magnetic resonance (CMR), and to investigate if ...
Ferreira-Martins João - - 2010
Although systole was for long considered the core of cardiac function, hemodynamic performance is evenly dependent on appropriate systolic and diastolic functions. The recognition that isolated diastolic dysfunction is the major culprit for approximately fifty percent of all heart failure cases imposes a deeper understanding of its underlying mechanisms so ...
Papaioannou Vasilios E - - 2010
Liberation from the ventilator is a difficult task, whereas early echocardiographic indices of weaning readiness are still lacking. The aim of this study was to test whether tricuspid annular plane systolic excursion (TAPSE) and right ventricular (RV) systolic (Sm) and diastolic (Em & Am) tissue Doppler imaging (TDI) velocities are ...
Alasti Mohammad - - 2010
Signal averaged electrocardiography is a noninvasive method to evaluate the presence of the potentials that are generated by tissues, activated later than their usual timing in the cardiac cycle. The purpose of this study was to demonstrate the correlation of data obtained via signal averaged electrocardiography and left ventricular dyssynchrony. ...
Golabchi Allahyar - - 2010
In most studies, the agreeable risk scores for ST-elevation myocardial infarction (STEMI) consist of thrombolytic in myocardial infarction (TIMI) risk score and modified Gensini risk score. Researchers showed significant relations between TIMI with angiography scores in patients with UA/NSTEMI. We studied this relation in patients with STEMI. We studied CCU ...
Bollache Emilie - - 2010
Early detection of diastolic dysfunction is crucial for patients with incipient heart failure. Although this evaluation could be performed from phase-contrast (PC) cardiovascular magnetic resonance (CMR) data, its usefulness in clinical routine is not yet established, mainly because the interpretation of such data remains mostly based on manual post-processing. Accordingly, ...
Li Shao-Hua - - 2010
The left ventricular synchronicity in hypertensive patients with overweight or obesity has not been well elucidated. This study was designed to evaluate the left ventricular synchronicity in these patients. Tissue Doppler imaging was performed in 126 hypertensive patients and 25 control subjects. The hypertensive patients were divided into three groups ...
Biagini Elena - - 2009
The Doppler echocardiographic pattern of restrictive left ventricular (LV) filling has proved to be an important predictor of clinical course and prognosis in dilated cardiomyopathy. However, the relation between restrictive filling pattern and clinical course has not been systematically investigated in hypertrophic cardiomyopathy (HC). We assessed the prognostic implications of ...
Goldberg Ythan H - - 2010
AIMS: Pulsed Doppler measurement of left atrial appendage (LAA) emptying velocity, a marker of left atrium contractile function, has been shown to predict success of cardioversion, thrombo-embolic risk, and maintenance of sinus rhythm after cardioversion and pulmonary vein isolation. However, in the published literature, emptying velocity measurement location is not ...
Tugcu Aylin - - 2010
BACKGROUND: The aims of this study were to evaluate subclinical regional right ventricular (RV) dysfunction in newly diagnosed obstructive sleep apnea (OSA) patients without systemic and pulmonary arterial (PA) hypertension, and to correlate OSA severity to RV dysfunction, using both velocity vector imaging (VVI)-derived strain imaging and tissue Doppler imaging ...
Liu Xiaowei - - 2010
OBJECTIVES: Velocity vector imaging (VVI) is a novel echocardiography technique to assess myocardial motion in two dimensions. In this study, we used VVI to assess left ventricular twist (LVtwist) in dilated cardiomyopathy (DCM) patients. METHODS: Twenty DCM patients and 31 normal subjects were evaluated. Echocardiographic images of the long and ...
Föll Daniela - - 2010
BACKGROUND: An exact understanding of normal age- and gender-matched regional myocardial performance is an essential prerequisite for the diagnosis of heart disease. Magnetic resonance phase-contrast imaging (tissue phase mapping) enabling the analysis of segmental, 3-directional myocardial velocities with high temporal resolution (13.8 ms) was used to assess left ventricular motion. ...
Park Sang Min - - 2010
A 52-year-old woman presented with severe dyspnea of 2 weeks' duration. Echocardiography showed an enlarged left atrium but normal global left ventricular systolic function. However, a huge, irregularly shaped mass at the dilated coronary sinus that extended into the right atrium was noted. Mitral inflow showed restrictive physiology and the ...
Anstadt Mark P - - 2009
BACKGROUND: Direct mechanical ventricular actuation (DMVA) provides non-blood contacting augmentation of ventricular function. The device has promise for supporting the pediatric heart. The purpose of this study was to assess DMVA's effect in a small animal model of heart failure. METHODS: Anesthetized rabbits (n = 6) underwent sternotomy and were ...
Van Mieghem Tim - - 2009
Fetal cardiac function is increasingly recognized as a marker of disease severity and prognosis in selected fetal conditions. Magnetic resonance imaging (MRI) has been used in experimental (animal) fetal cardiology but the lack of a noninvasive fetal electrocardiogram (ECG) to trigger image acquisition remains a major limiting factor precluding its ...
Escaned Javier - - 2009
INTRODUCTION AND OBJECTIVES: Diabetes mellitus (DM) is associated with the development of both impaired left ventricular diastolic function (LVDF) and pathological changes in the coronary macro- and microcirculation. The aim of this study was to investigate the relationship between these manifestations of diabetic heart disease. METHODS: The severity of atherosclerosis ...
Jang Hee Sang - - 2009
There have been very few pathophysiologic studies on isolated diastolic dysfunction. We hypothesized that the characteristics of isolated diastolic dysfunction would be located, on the clinical continuum, between those of a normal heart and diastolic heart failure. We enrolled 102 subjects who had no history of overt symptoms of heart ...
Chahal Navtej S - - 2010
Tissue Doppler imaging (TDI) is used routinely to quantify left ventricular function and filling pressure. However, there remains a lack of percentile-based normative reference values for these clinically important parameters. Four hundred and fifty-three healthy subjects aged 35-75 years were included for analysis from the London Life Sciences Prospective Population ...
Henein Mark - - 2011
The Bernheim 'a' wave in the jugular venous pulse of patients with left ventricular hypertrophy has been shown to reflect accentuated right atrial activity. To study possible atrial interaction in patients with right and left ventricular outflow tract obstruction due to significant pulmonary (PS) and aortic valvular stenosis (AS) respectively. ...
Joshi Suchita - - 2010
Myocardial velocity imaging has been validated in adults for assessment of ventricular function and indirect indices of pulmonary arterial pressure. To establish whether it could also be used in infants, we investigated the reproducibility of myocardial velocities and deformation indices in term and preterm neonates. Myocardial velocity loops acquired from ...
Florianczyk Tomasz - - 2010
SUMMARY AIM: Assessment of left ventricular systolic function in children after the successful repair of aortic coarctation using tissue Doppler imaging (TDI). The study group consisted of 32 patients (mean age 12.0 +/- 4.2 years) after the aortic coarctation repair. The TDI parameters and the conventional echocardiographic endocardial and midwall ...
Russo Andrea - - 2009
BACKGROUND AND OBJECTIVE: Several reports concerning the haemodynamic changes during gynaecologic laparoscopy have been published so far, and the effects of head-down tilt and pneumoperitoneum have not been clearly separated. However, its main effect seems to be an increase in systemic vascular resistance. We investigated how the augmented afterload can ...
HORI Yasutomo - - 2009
This study investigated the feasibility of using the values of tissue Doppler imaging (TDI)-derived myocardial velocity during isovolumic relaxation (V(IR)) and myocardial acceleration during isovolumic relaxation (ACC) obtained from the left ventricular (LV) free wall to evaluate LV relaxation in normal dogs. Seven dogs were anesthetized, and dobutamine or esmolol ...
Belohlavek Marek - - 2009
OBJECTIVE: There is considerable epidemiologic evidence that Alzheimer disease (AD) is linked to cardiovascular risk factors and associated with an increased risk of symptomatic left ventricular (LV) dysfunction. Formation of a vortex alongside a diastolic jet signifies an efficient blood transport mechanism. The vortex formation time (VFT) is an index ...
Tidholm A A Albano Animal Hospital, Rinkebyvägen 23, Danderyd, Sweden. - - 2009
Tissue Doppler imaging (TDI) including strain and strain rate (SR) assess systolic and diastolic myocardial function. TDI, strain, and SR variables of the left ventricle (LV) and the interventricular septum (IVS) differ significantly between dogs with myxomatous mitral valve disease (MMVD) with and without congestive heart failure (CHF). Sixty-one dogs ...
Chattopadhyay Sudipta - - 2010
The genesis of symptoms in patients with heart failure (HF) and normal ejection fraction (HFNEF) is unclear. Most investigations of HFNEF have focused on cardiac function at rest although most of these patients are breathless only on exercise. Stress-induced impairment in systolic or diastolic function could result in these symptoms. ...
Corrigan Niamh - - 2010
AIM: The aim of this study is to assess the murine heart of normal embryos, neonates, and juveniles using high-frequency ultrasound. METHODS: Diastolic function was measured with E/A ratio (E wave velocity/A wave velocity) and isovolumetric relaxation time (IRT), systolic function with isovolumetric contraction time (ICT), percentage fractional shortening (FS ...
Ishii Katsuhisa - - 2009
OBJECTIVES: This study was designed to characterize both regional left ventricular (LV) systolic and diastolic function after percutaneous coronary intervention by using strain imaging (SI) derived from 2-dimensional speckle-tracking echocardiography. BACKGROUND: Ischemic insult after coronary occlusion affects not only regional LV systolic but also diastolic function. METHODS: Regional LV transverse ...
Chinali Marcello - - 2009
The early mitral flow deceleration time (DTE) is a prognostically validated marker of left ventricular diastolic dysfunction. It has been reported that the DTE is influenced by the loading conditions, which can vary during antihypertensive treatment. We hypothesized that normalization of the DTE for mitral peak E-velocity (mitral deceleration index ...
Ito Takahide - - 2009
Postsystolic shortening (PSS), a positive myocardial velocity after aortic valve closure as assessed by Doppler tissue imaging, is a common pathologic finding in patients with myocardial disease. Beta-blocker therapy can improve global and regional myocardial function. The aim of the present study was to examine whether the beta-blocker carvedilol might ...
Pauliks Linda B - - 2009
Impaired myocardial relaxation is an important aftereffect of cardiopulmonary bypass (CPB). Infants with their immature calcium metabolism may be particularly vulnerable. However, it has been difficult to quantitate diastolic dysfunction clinically. This study used tissue Doppler to measure regional diastolic myocardial velocities in 31 pediatric patients undergoing open heart surgery. ...
Arslankoylu Ali Ertug - - 2010
BACKGROUND: The purpose of this study was to evaluate left and right ventricular functions by using the Doppler myocardial performance index (MPI), in children with sickle cell anemia (SCA). METHODS: We examined 32 patients with SCA and 30 age-matched healthy children. Echocardiography and Doppler examinations were completed for each of ...
van Dalen Bas M - - 2009
BACKGROUND: Almost all patients with hypertrophic cardiomyopathy (HCM) have some degree of left ventricular (LV) diastolic dysfunction. Nevertheless, the pathophysiology remains incompletely characterized. Conceptually, an ideal therapeutic agent should target the underlying mechanisms that cause LV diastolic dysfunction. Assessment of diastolic LV untwisting could potentially be helpful to gain insight ...
Kjaergaard Jesper - - 2010
Little is known of the impact of acute right ventricular (RV) volume overload on RV function. We assessed the impact of acute severe pulmonary regurgitation (PR) on global and regional RV function by applying novel quantitative echocardiographic markers of myocardial performance in an animal model. Transthoracic echocardiography, including tissue-Doppler echocardiography ...
Li Yue - - 2009
BACKGROUND: Left atrial enlargement has been suggested as a more robust marker of diastolic dysfunction. We hypothesize that the ratio of left atrial volume to left ventricular volume (LAV/LVV) may be more reasonable to reflect left atrial enlargement in the patients with hypertension, because hypertensive patients have a characteristic of ...
Galderisi Maurizio - - 2009
PURPOSE: Our aim was to analyze the effects of 3-month antihypertensive therapy by nebivolol, a beta-blocking agent with nitric oxide-mediated vasodilatory properties, on coronary flow reserve (CFR) and left ventricular filling pressure (LVFP) in uncomplicated arterial hypertension. METHODS: Twenty newly diagnosed, never treated, uncomplicated hypertensive patients (14 male and six ...
Lopez Leo - - 2009
PURPOSE OF REVIEW: This study will outline recent advances in echocardiography and their impact in the understanding of cardiac morphology and ventricular function. RECENT FINDINGS: Evaluation of morphologic abnormalities in pediatric cardiology has benefited greatly from three-dimensional echocardiography, particularly with the introduction of high-frequency transducers. The size of cardiovascular structures ...
Tayyareci Yelda - - 2009
OBJECTIVES: The aim of the study was to assess validity of tissue Doppler imaging (TDI)-derived right ventricular (RV) myocardial systolic velocities in early detection of RV systolic dysfunction in chronic obstructive pulmonary disease (COPD). METHODS: Ninety COPD patients (50 pure COPD and 40 with right heart failure [RHF]) and 40 ...
Feissel Marc - - 2009
BACKGROUND: The aim of this study was to assess the most relevant echocardiographic parameter for the clinical diagnosis of acute dyspnea due to left-heart dysfunction. METHODS: Transthoracic echocardiography was performed in 88 patients in sinus rhythm admitted for respiratory distress. Two experts determined the cause of dyspnea as cardiogenic (26 ...
Kiotsekoglou Anatoli A Department of Cardiac and Vascular Sciences, St George's University of London, Cranmer Terrace, London SW17 0RE, - - 2009
Previous studies provided evidence about left ventricular systolic and diastolic dysfunction in adults with Marfan syndrome (MFS). However, in the literature, data on right ventricular and bi-atrial diastolic function are limited. We aimed to investigate whether, in the absence of significant valvular disease, diastolic dysfunction is present not only in ...
Kawaji Keigo K Department of Radiology and the Division of Cardiology, Weill Cornell Medical College, New York, NY 10021, - - 2009
Cardiac magnetic resonance (CMR) is established for assessment of left ventricular (LV) systolic function but has not been widely used to assess diastolic function. This study tested performance of a novel CMR segmentation algorithm (LV-METRIC) for automated assessment of diastolic function. A total of 101 patients with normal LV systolic ...
Biswas Shankar K - - 2009
(123)I-beta-methyl-iodophenyl pentadecanoic acid (BMIPP) and (99m)Tc-Tetrofosmin (TF) mismatch designated as stunned myocardium having both systolic and diastolic components. The degree of mismatch might reflect subsequent functional improvement, and this study was designed to unravel the impact of mismatched defect score (MMDS) on recovery of both systolic and diastolic function following ...
Mu Yuming Y Department of Echocardiography, First Affiliated Hospital, Xinjiang Medical University, Urmuqi, China. - - 2010
To investigate two-dimensional ultrasound speckle tracking imaging (STI) in evaluating values of early changes in left ventricular diastolic function in patients with essential hypertension (EH). Seventy-five EH patients with left ventricular normal geometry (LVN), including 38 cases with nonleft atrial enlargement (NLAE) and 37 cases with left atrial enlargement (LAE), ...
Gunes Yilmaz - - 2009
BACKGROUND: Microvascular and endothelial dysfunction have been implicated for coronary slow flow (CSF). Nebivolol, besides its beta-receptor blocking activity, causes an endothelium-dependent vasodilatation through increased nitric oxide release. METHODS: This study included 27 patients with CSF and 27 subjects with normal coronary arteries. Segmental functions of the left ventricle (LV) ...
Moreo Antonella A Ohio State University, Columbus, Ohio 43210, - - 2009
Fibrosis is a common end point of many pathological processes affecting the myocardium and may alter myocardial relaxation properties. By measuring myocardial fibrosis with cardiac magnetic resonance and diastolic function with Doppler echocardiography, we sought to define the influence of fibrosis on left ventricular diastolic function. Two hundred four eligible ...
Tsai Wei-Chuan - - 2009
BACKGROUND: We hypothesized that contraction of the LA wall could be documented by speckle tracking and could be applied for assessment of LA function. This study tried to identify the association between LA longitudinal strain (LAS) and strain rate (LASR) measured by speckle tracking with paroxysmal atrial fibrillation (PAF). METHODS: ...
Kosmala W - - 2009
AIMS/HYPOTHESIS: Weight excess and insulin resistance mediate the link between obesity and left ventricular dysfunction. We investigated the effect and mechanisms of lifestyle modification on left ventricular function changes in obese patients. METHODS: Reduction of body weight and insulin resistance was sought using a behavioural intervention programme including dietary restrictions ...
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