Search Results
Results 201 - 250 of 1670
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Marmursztejn J - - 2009
OBJECTIVE: To examine the diagnostic contributions of cardiac magnetic resonance imaging (CMRI) with delayed-enhancement (DE) in patients with Churg-Strauss syndrome (CSS).METHODS: We consecutively recruited 14 men and 6 women (mean age: 50+/-14 years) with CSS (mean disease duration: 4.5+/-3.6 years) and investigated them independently of the presence/absence of cardiac manifestations. ...
Masci Pier Giorgio - - 2009
PURPOSE: To quantify regional ejection fraction (EF) in patients with myocardial infarction (MI) by using merged late gadolinium enhancement (LGE) and cine magnetic resonance (MR) imaging, and compare this method with the standardized 17-segment American Heart Association approach. MATERIALS AND METHODS: After institutional review board approval and informed consent, 15 ...
Nasseri Boris A - - 2009
The subtle effects of transplanted bone marrow cells (BMC) on regional myocardial behavior in patients with ischemic heart disease are difficult to assess. Novel echocardiographic techniques can quantify regional myocardial deformation (strain) and distinguish between passive and active wall motion. We hypothesized that this technique may help delineate cell therapy-induced ...
Giri Shivraman - - 2009
BACKGROUND: T2-Weighted (T2W) magnetic resonance imaging (MRI) pulse sequences have been used to detect edema in patients with acute myocardial infarction and differentiate acute from chronic infarction. T2W sequences have suffered from several problems including (i) signal intensity variability caused by phased array coils, (ii) high signal from slow moving ...
Shehata Monda L - - 2009
Cardiovascular magnetic resonance (CMR) is currently the gold standard for assessing both global and regional myocardial function. New tools for quantifying regional function have been recently developed to characterize early myocardial dysfunction in order to improve the identification and management of individuals at risk for heart failure. Of particular interest ...
Engblom Henrik - - 2009
BACKGROUND: The time course and magnitude of infarct involution, functional recovery, and normalization of infarct-related electrocardiographic (ECG) changes after acute myocardial infarction (MI) are not completely known in humans. We sought to explore these processes early after MI and during infarct-healing using cardiac MRI. METHODS AND RESULTS: Twenty-two patients with ...
Nowosielski Martha - - 2009
OBJECTIVES: The purpose of this study was to compare cardiovascular magnetic resonance (CMR) and echocardiography (echo) in patients treated with primary percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI) with emphasis on the analysis of left ventricular function and left ventricular wall motion characteristics. METHODS: We performed CMR and ...
Vlahodimitris Ioannis - - 2009
A 42 year old woman was admitted to our hospital for investigation of eosinophilia. There were no findings from the physical examination of the lungs and heart. The echocardiography showed a segmental hypokinesia of the interventricular septum and the apex causing left ventricular dysfunction with an ejection fraction 45% and ...
Histace Aymeric - - 2009
The noninvasive assessment of cardiac function is of first importance for the diagnosis of cardiovascular diseases. Among all medical scanners only a few enables radiologists to evaluate the local cardiac motion. Tagged cardiac MRI is one of them. This protocol generates on Short-Axis (SA) sequences a dark grid which is ...
Theofilogiannakos Efstratios K - - 2009
Following fixation and MRI imaging a post-mortem human heart was sliced at the sagittal plane. Each anatomical section was then cut into smaller segments and each one was objected to classical histology process. The resulting microscopy slides were digitalized with a scanner. The histological section reconstruction was achieved using Adobe ...
Li Wei - - 2009
BACKGROUND: Duchenne muscular dystrophy (DMD) is caused by the absence of the cytoskeletal protein, dystrophin. In DMD patients, dilated cardiomyopathy leading to heart failure may occur during adolescence. However, early cardiac dysfunction is frequently undetected due to physical inactivity and generalized debilitation. The objective of this study is to determine ...
Maret Eva - - 2009
The aim of the study was to perform a feature tracking analysis on cine magnetic resonance (MR) images to elucidate if functional measurements of the motion of the left ventricular wall may detect scar defined with gadolinium enhanced MR.Myocardial contraction can be measured in terms of the velocity, displacement and ...
Salemi Vera Maria Cury - - 2009
We compared left ventricular regional wall motion, the global left ventricular ejection fraction, and the New York Heart Association functional class pre- and postoperatively. Endomyocardial fibrosis is characterized by fibrous tissue deposition in the endomyocardium of the apex and/or inflow tract of one or both ventricles. Although left ventricular global ...
Fazio Giovanni - - 2010
Non-compaction of the ventricular myocardium (LCVM) is a rare disorder of myocardial morphogenesis usually diagnosed in paediatric age. The diagnosis was echocardiographically made on the basis of a reported spongeous/compacted ratio >2 in one or more segments of the left ventricle during the diastolic period. We aimed to test the ...
Barami Kaveh - - 2009
The role of neural stem cells in gliomagenesis remains controversial. The aim of this study was to determine the anatomic relationship of human gliomas to the lining of the ventricular walls, known as the subventricular zone, an area replete with neural stem cells. We performed a retrospective radiographic analysis of ...
Patrignani Anna - - 2009
We presented the case of a diabetic 67-year old female patient suffering from "Takotsubo cardiomyopathy". She arrived at the emergency department with severe chest pain soon after acute emotional and physical stress. The echocardiography performed in the acute phase showed balloon-like left ventricular wall motion abnormality with severe global dysfunction ...
Joshi Subodh B - - 2009
Paradoxical septal motion is commonly noted on echocardiography after coronary artery bypass grafting (CABG), but its mechanism is unclear. Cardiac magnetic resonance imaging was performed before and 3 months after CABG in 23 patients. On a mid-left ventricular short-axis cine image, the motion of myocardial landmarks during the cardiac cycle ...
Nasiraei-Moghaddam Abbas - - 2009
Characterization of local and global contractile activities in the myocardium is essential for a better understanding of cardiac form and function. The spatial distribution of regions that contribute the most to cardiac function plays an important role in defining the pumping parameters of the myocardium like ejection fraction and dynamic ...
Vargas-Barrón Jesús - - 2009
BACKGROUND: In large necropsy studies dissecting intramyocardial hematoma (DIH) with serpiginous tracts across the myocardial fibers has been reported in both the septum and the left ventricle free wall. METHODS: We studied 15 patients admitted to the hospital with acute myocardial infarction (AMI) in which DIH was demonstrated by either ...
Cirillo Marco - - 2008
AIMS: We present a case of surgical anterior ventricular restoration for ischemic cardiomyopathy performed by a modified surgical technique, in which we obtained the renewal of left ventricular torsion. METHODS: We set a modified restoration technique utilizing a strip patch with the aim to realign fibers displaced by postinfarction fibrosis. ...
Gjesdal Ola - - 2008
BACKGROUND: The objective of the study was to evaluate the ability of established and new parameters of global systolic left ventricle function to estimate myocardial infarct size. Increasing infarct extent is associated with impaired prognosis in chronic ischemic heart disease. Systolic myocardial deformation is a complex 3D process that is ...
Lee Wei-Ning WN Department of Biomedical Engineering, Columbia University, New York, NY 10027, - - 2008
Myocardial elastography (ME), a radio-frequency (RF) based speckle tracking technique, was employed in order to image the entire two-dimensional (2D) transmural deformation field in full echocardiographic views and was validated against tagged magnetic resonance imaging (tMRI) in normal as well as reperfused (i.e., treated myocardial infarction [MI]) human left ventricles. ...
Ohara Yoshikazu - - 2008
BACKGROUND: Strain Doppler echocardiography can detect regional myocardial dysfunction after acute myocardial infarction (AMI). The aim of this study was to assess the utility of strain in predicting regional wall motion recovery after AMI compared with the coronary flow velocity pattern. METHODS: Thirty-three patients with anterior AMIs undergoing successful coronary ...
Sorrell Vincent L - - 2008
OBJECTIVE: To compare the reproducibility of conventional gray-scale M-mode to color Doppler M-mode assessment of the septal-to-posterior wall motion delay (SPWMD) which is used as a marker of left ventricular mechanical dyssynchrony. METHODS: Forty-two SPWMD datasets were interpreted by two experienced cardiologists and the inter- and intraobserver correlation coefficients were ...
Kim Song-Jung - - 2008
Epidemiologic studies have shown a high frequency of major cardiac events at night in patients with coronary artery disease. This has been attributed to the sympathetic surges accompanying rapid eye movement (REM) sleep; the role of non-REM sleep, which comprises 80% of total sleep duration, has been largely neglected. Accordingly, ...
Foker John E - - 2008
OBJECTIVE: At the severe end of the spectrum of infants with pulmonary atresia and intact ventricular septum, the likelihood of significant right ventricle to coronary artery connections increases. Our purpose is to present the first series of right ventricle to coronary artery connections ligated off bypass before right ventricular decompression ...
Kirkpatrick James N - - 2008
Assessment of myocardial mechanics has been an important research endeavor in echocardiography for many years. Advances in understanding cardiac motion, coupled with treatments that address derangements in myocardial mechanics, have suggested that clinical application of this research may benefit patients in the detection of subclinical disease, quantification of myocardial tissue ...
Coppola Benjamin A BA Departments of Bioengineering, University of California, San Diego, La Jolla, CA 92093, - - 2008
It is well known that systolic wall thickening in the inner half of the left ventricular (LV) wall is of greater magnitude than predicted by myofiber contraction alone. Previous studies have related the deformation of the LV wall to the orientation of the laminar architecture. Using this method, wall thickening ...
Germing A - - 2008
Coronary angiograms performed at the time of an acute coronary syndrome typically present vessel occlusions, ruptured plaques or thrombotic lesions that require reperfusion therapy. However, occasionally, no coronary artery stenoses are detected. Myocardial ischemia frequently causes left ventricular wall motion abnormalities that can be seen easily by echocardiography. In our ...
Moriya Manabu - - 2009
A 67-year-old woman without history of heart disease was admitted with chest oppression. Her electrocardiogram (ECG) at the time of admission showed ST segment elevation in leads V2-V6. Cardiac ultrasound revealed severe hypokinesis in mid to apical portion of anterior wall. Emergent coronary angiography showed normal coronary arteries. Left ventriculography ...
Kristensen Thomas S - - 2009
BACKGROUND: Multidetector computed tomography (MDCT) of the heart provides both anatomical and functional information. The objective of this study was to evaluate the accuracy of quantitative assessment of left ventricular contractile function in relation to two-dimensional transthoracic echocardiography (TTE). MATERIALS AND METHODS: Sixty-four patients with known or suspected coronary artery ...
Lim Hong-Seok - - 2009
BACKGROUND: There is limited data on the diagnostic utility of the transmitral to mitral annular velocity (E/E') by tissue Doppler imaging (TDI) in the presence of regional wall motion abnormalities (RWMA). We aimed to investigate whether the E/E' is reliable in estimating left ventricular filling pressure (LVFP) despite RWMA. METHODS: ...
Lee Wei-Ning WN Ultrasound and Elasticity Imaging Laboratory, Department of Biomedical Engineering, Columbia University, New York, NY 10027, - - 2008
The angle-independent myocardial elastography, which shows good performance in our proposed theoretical framework using a three-dimensional, ultrasonic image formation model based on well-established, 3D finite-element, canine, left-ventricular models in both normal and left-circumflex ischemic cases, is employed as well as validated in vivo to assess the contractility of normal and ...
Pflederer T - - 2009
OBJECTIVE: Assessment of left ventricular function is possible in contrast-enhanced cardiac CT data sets. However, rapid ventricular motion especially in systole can lead to artifacts. Dual Source Computed Tomography (DSCT) has high temporal resolution which effectively limits motion artifact. We therefore assessed the accuracy of DSCT to detect regional left ...
Dandel Michael - - 2009
We present our observations on 2 cases of stress cardiomyopathy in which, for the first time, wall motion and myocardial deformation analysis were performed by 2D-strain imaging. Strikingly, in both patients, serial 2D-strain wall motion analysis revealed always synergic and synchronic longitudinal strain and strain-rate patterns, even during the acute ...
Smith Rebecca M RM Department of Pharmacology, SUNY Upstate Medical University, Syracuse, New York 13210, - - 2008
Mapping the myocardial fiber organization is important for assessing the electrical and mechanical properties of normal and diseased hearts. Current methods to determine the fiber organization have several limitations: histological sectioning mechanically distorts the tissue and is labor-intensive, while diffusion tensor imaging has low spatial resolution and requires expensive MRI ...
Nicol Edward D - - 2008
BACKGROUND: Cardiac computed tomography (CCT) has the potential to assess both coronary anatomy and ventricular function in a single study. We examined the agreement between CCT and myocardial perfusion scintigraphy (MPS) for the assessment of global and regional ventricular function. METHODS AND RESULTS: Research CCT was performed in 52 patients ...
Matsuura Noriaki - - 2008
OBJECTIVE: The purpose of our study was to investigate the cardiac phase with the least interscan variability and motion artifacts on coronary artery calcium studies using a 64-MDCT scanner. SUBJECTS AND METHODS: Ninety-one patients with suspected coronary artery disease were scanned twice on retrospective ECG-gated helical scans. Images with 2.5-mm ...
Shentu Weihui - - 2008
The myocardial viability after myocardial infarction was evaluated by intravenous myocardial contrast echocardiography. Intravenous real-time myocardial contrast echocardiography was performed on 18 patients with myocardial infarction before coronary revascularization. Follow-up echocardiography was performed 3 months after coronary revascularization. Segmental wall motion was assessed using 18-segment LV model and classified as ...
Yamaguchi Koji - - 2008
A 57-year-old female patient, who was initially suspected to have subarachnoid hemorrhage, was admitted to our hospital. She experienced severe dyspnea and chest pain owing to pneumonia on the fourth admission day. Electrocardiography showed ST-segment elevation in leads V(2) through V(5), and echocardiography revealed hypokinetic left ventricular wall motion. No ...
Spottiswoode Bruce S - - 2008
PURPOSE: To track three-dimensional (3D) myocardial tissue motion using slice followed cine displacement encoded imaging with stimulated echoes (DENSE). MATERIALS AND METHODS: Slice following (SF) has previously been developed for 2D myocardial tagging to compensate for the effect of through-plane motion on 2D tissue tracking. By incorporating SF into a ...
Nef Holger M - - 2009
Consumption of natural hallucinogenic substances continues to be a problem. In this case we report from a young male patient presenting with an acute coronary syndrome with significant ST-elevation after the abuse of psychoactive fungi, commonly referred to as "magic mushrooms". Coronary angiography excludes relevant coronary artery disease. In ventriculography ...
Rutz Andrea K - - 2008
Myocardial tissue tagging using complementary spatial modulation of magnetization (CSPAMM) allows detailed assessment of myocardial motion. To capture the complex 3D cardiac motion pattern, multiple 2D tagged slices are usually acquired in different orientations. These approaches are prone to slice misregistration and associated with long acquisition times. In this work, ...
Cicala Silvana - - 2008
OBJECTIVES: Left ventricular systolic wall motion abnormalities have prognostic value. Whether wall motion detected by serial echocardiographic examinations predicts prognosis in hypertensive patients with left ventricular hypertrophy (LVH) without clinically recognized atherosclerotic disease has, however, never been investigated. We examined whether 'in-treatment' wall motion abnormalities predicted outcome in the Losartan ...
Ojha Navdeep - - 2008
High-resolution (11.7 T) cardiac magnetic resonance imaging (MRI) and histological approaches have been employed in tandem to characterize the secondary damage suffered by the murine myocardium following the initial insult caused by ischemia-reperfusion (I/R). I/R-induced changes in the myocardium were examined in five separate groups at the following time points ...
Kylmälä Minna M - - 2008
AIMS: The distribution of myocardial strain values can be visualized by colour-coded strain images. We examined for the first time if this strain-mapping function can be used to study the extent of prior myocardial infarction. METHODS AND RESULTS: Echocardiography and cardiac magnetic resonance imaging with delayed contrast enhancement were performed ...
Jurcut Ruxandra - - 2008
OBJECTIVE: Velocity vector imaging (VVI) is a new echocardiographic technique of measuring regional myocardial velocities and deformation. Our aim was to evaluate the feasibility and accuracy of VVI in defining regional functional abnormalities in patients with an acute myocardial infarction. METHODS: Standard echocardiography and delayed enhancement (DE) magnetic resonance imaging ...
Zaidi Ali N - - 2008
We report a case of a 34-year-old woman who had a left anterior wall myocardial infarction develop in the first trimester of pregnancy. Despite urgent and successful revascularization, she demonstrated persistent segmental wall motion abnormalities by transthoracic echocardiography. To manage this patient safely through pregnancy with a better definition of ...
Masuda Kasumi - - 2008
OBJECTIVES: The purpose of this study was to investigate the diagnostic value of velocity vector imaging (VVI) for detecting acute myocardial ischemia and whether VVI can accurately demonstrate the spatial extent of ischemic risk area. BACKGROUND: Using a tracking algorithm, VVI can display velocity vectors of regional wall motion overlaid ...
Gerbaud Edouard - - 2008
To compare MRI findings of left ventricular apical ballooning syndrome (LVABS) with those of acute myocardial infarction (AMI). Fifteen patients with a LVABS (group 1) and 25 patients with an AMI (group 2) were explored by MRI within 24 h after admission. Comparison of both groups for the number and ...
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