Search Results
Results 301 - 350 of 2195
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Grosse-Wortmann Lars - - 2010
The aim of the paper was to investigate the right ventricle in paediatric dilated cardiomyopathy. We examined 11 patients with dilated cardiomyopathy as well as 12 normal paediatric controls. Cardiac magnetic resonance imaging was performed for ventricular size and function. N-terminal pro-brain natriuretic peptide was collected at this time and ...
Rathod Rahul H - - 2010
OBJECTIVES: The purpose of this study was to evaluate the relationship between myocardial fibrosis identified by cardiac magnetic resonance (CMR) and ventricular performance and arrhythmias in patients late after the Fontan operation. BACKGROUND: Patients who have undergone the Fontan palliation may develop ventricular dysfunction and arrhythmias, but the mechanisms and ...
Di Donato Marisa - - 2010
Left ventricular end-diastolic volume is decreased and ejection fraction is increased after surgical ventricular reconstruction; however, the impact on left ventricular stroke volume is not well established. We analyzed 248 consecutive patients who underwent surgical ventricular reconstruction at a single center. There were 14 perioperative deaths (5.6%). The 234 surviving ...
ten Brinke Ellen A - - 2010
Previous studies demonstrated beneficial short-term effects of surgical ventricular restoration on mechanical dyssynchrony and left ventricular function and improved midterm and long-term clinical parameters. However, long-term effects on systolic and diastolic left ventricular function are still largely unknown. We studied 9 patients with ischemic dilated cardiomyopathy who underwent surgical ventricular ...
Wilson Thad E - - 2010
To determine whether skin surface cooling increases left ventricular preload and contractility to a greater extent in older compared with young adults we studied 11 young (28 +/- 2 yr; means +/- SE) and 11 older (64 +/- 3 yr) adults during normothermia (35 degrees C water perfused through a ...
McNamara Patrick J - - 2010
OBJECTIVE: Patent ductus arteriosus ligation is often complicated by systemic hypotension and oxygenation failure. The ability of the immature myocardium to compensate for altered afterload is poorly understood. The aim of this study was to characterize the effects of patent ductus arteriosus ligation on myocardial performance in preterm infants. METHODS: ...
Lee Lawrence S - - 2010
Effects of ventricular restraint on the left ventricle are well documented, but effects on the right ventricle are not. We hypothesized that restraint affects the right and left ventricles differently. We studied acute effects of restraint on left and right ventricular mechanics in healthy sheep (n = 14) with our ...
Huisman Jennifer - - 2010
AIMS: To assess for the first time in a multicentre design the between-centre reproducibility of volumetric virtual histology intravascular ultrasound (VH-IVUS) measurements with a semi-automated, computerassisted contour detection system in mild-to-moderately diseased coronary segments. METHODS AND RESULTS: Analysts of four European IVUS centres performed independent IVUS analyses (in total 7,188 ...
Giles Jon T - - 2010
Heart failure is a major contributor to cardiovascular morbidity and mortality in patients with rheumatoid arthritis (RA), but little is known about myocardial structure and function in this population. This study was undertaken to assess the factors associated with progression to heart failure in patients with RA. With the use ...
Yuce Murat - - 2010
Reliable echocardiographic markers additional to plasma biomarkers that would establish prognosis of chronic heart failure and guide therapeutic approach would be beneficial. In our hypothesis, echocardiographic assessment of coronary sinus anatomic alteration, which has been ignored, may be part of remodeling process in heart failure. We also aimed to evaluate ...
Sun Kay - - 2010
Endoventricular patch plasty (Dor) is used to reduce left ventricular volume after myocardial infarction and subsequent left ventricular remodeling. End-diastolic and end-systolic pressure-volume and Starling relationships were measured, and magnetic resonance images with noninvasive tags were used to calculate 3-dimensional myocardial strain in 6 sheep 2 weeks before and 2 ...
Loiske K - - 2010
PURPOSE: The size of the ventricles of the heart is important to establish during the clinical echocardiographic examination. Due to the complex anatomy of the right ventricle, it is difficult to measure its size at times. One of the most frequently used ways is to measure the right ventricular outflow ...
Müller Hajo - - 2010
AIMS: Left atrial (LA) volume can be determined during radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF) with angiography or electro-anatomic (CARTO) mapping. We compared these volumes with LA volume measured using transthoracic real-time three-dimensional echocardiography (3DE). METHODS AND RESULTS: One hundred and twenty-seven consecutive patients undergoing RFCA for AF ...
Fukushima Ryuji - - 2010
It is required not to increase the ventricular rate and to preserve the ventricular systolic function in treating supraventricular tachyarrhythmia (SVTA). The objective of this study is to investigate whether or not Efonidipine hydrochloride (EH), a T and L dual type Ca(2+) channel blocker, suppresses the increasing ventricular rate without ...
Ceriani Luca - - 2010
The purposes of this study were to characterize the performance of a 3-dimensional (3D) ordered-subset expectation maximization (OSEM) algorithm in the quantification of left ventricular (LV) function with (99m)Tc-labeled agent gated SPECT (G-SPECT), the QGS program, and a beating-heart phantom and to optimize the reconstruction parameters for clinical applications. METHODS: ...
Thierer Jorge - - 2010
Catabolism and inflammation play a role in the physiopathology of heart failure with reduced ejection fraction and are more pronounced in the advanced stages of the disease. Our aim was to demonstrate that in patients with stable heart failure with reduced ejection fraction adequately treated, a direct relation exists between ...
Trivax Justin E - - 2010
We sought to clarify the significance of cardiac dysfunction and to assess its relationship with elevated biomarkers by using cardiovascular magnetic resonance imaging in healthy, middle-aged subjects immediately after they ran 26.2 miles. Cardiac dysfunction and elevated blood markers of myocardial injury have been reported after prolonged strenuous exercise. From ...
Lee Ki-Ja - - 2010
OBJECTIVE: To evaluate lateral ventricular size in clinically normal calves by use of computed tomography and to examine the relationships between ventricular height (Vh), ventricular area (VA), and ventricular volume (VV). ANIMALS: 14 Holstein calves. Procedures-14 calves underwent computed tomography of the head with transverse images acquired from the rostral ...
Wen Zhaoying - - 2010
We wanted to assess the performance of dual-source CT (DSCT) for evaluating the left atrial volume and function and we compared this performance to that of the standard reference technique,cardiac cine MR (CMR). Fifty-one patients who were referred for CT coronary angiography were included in the study. Two were subsequently ...
Rizzo Giuseppe - - 2010
OBJECTIVE: The purpose of this study was to compare the agreement and reliability of virtual organ computer-aided analysis (VOCAL) and sonographic automatic volume calculation (sonoAVC) for measurements of ventricular volume from fetal heart data sets acquired by 4-dimensional sonography with spatiotemporal image correlation (STIC). METHODS: We studied 45 volumes from ...
Barr R Graham - - 2010
Very severe chronic obstructive pulmonary disease causes cor pulmonale with elevated pulmonary vascular resistance and secondary reductions in left ventricular filling, stroke volume, and cardiac output. We hypothesized that emphysema, as detected on computed tomography (CT), and airflow obstruction are inversely related to left ventricular end-diastolic volume, stroke volume, and ...
Diez-Prieto Inmaculada - - 2010
Heart growth in 6 female beagle dogs was measured by using M-mode echocardiography at 4, 7, 10, 13, 17, and 21 mo of age. The same 6 dogs were evaluated throughout the study to establish when cardiac development ends in this breed. The following parameters were measured during systole and ...
Phan Thanh Trung - - 2010
Whilst resting disturbances of both diastolic and long-axis systolic function are observed in patients with heart failure who have normal left ventricular ejection fraction, recent evidence suggests that dynamic disturbances in cardiac function occur during exercise. A paradoxical slowing of left ventricular active relaxation during exercise limits cardiac filling and ...
Cirillo Marco - - 2010
OBJECTIVES: To test the potential of the heart to be surgically restored at a near-normal global condition, granted that its physiological characteristics are respected (working volumes, chamber geometry, fiber orientation, opposite rotation of apex and base, global torsion and strain). METHODS: From May 2007 to December 2008, 12 consecutive patients ...
Choi Hon Fai - - 2010
Left-ventricular shape is an important determinant of regional wall mechanics during passive filling. To examine the influence of left-ventricular shape for the ejection phase, the distribution of active fiber stress at the beginning of ejection was calculated in a finite element study. Hereto, finite element models were constructed with varying ...
Graziani Giorgio - - 2010
BACKGROUND: On the basis of cardiovascular compliance, hemodialysis (HD) patients can be classified as hypotension prone (HP) or hypotension resistant (HR). METHODS: We compare the hemodynamic behavior and myocardial performances in 6 HP and 6 HR patients before and after an isolated ultrafiltration (IU) session removing 3% of total body ...
Hedeer Fredrik - - 2010
BACKGROUND: We sought to compare quantification of left ventricular volumes and ejection fraction by different gated myocardial perfusion SPECT (MPS) programs with each other and to magnetic resonance (MR) imaging. METHODS: N = 100 patients with known or suspected coronary artery disease were examined at rest with 99 mTc-tetrofosmin gated ...
Drosch Tanja - - 2010
This study assesses the global left ventricular function and volumes using dual-source computed tomography (DSCT) with improved temporal resolution (83 ms) by use of a semi-automatic software tool in comparison to invasive angiography (IVA). One hundred patients scheduled for invasive coronary angiography because of suspected or known coronary artery disease ...
Lindsey C Wesley - - 2010
BACKGROUND: After tetralogy of Fallot (TOF) repair, severe pulmonary insufficiency is known to impair biventricular function. Pulmonary valve replacement (PVR) alleviates symptoms, normalizes right ventricular volumes, and improves ventricular function. Most studies addressing the role of PVR have examined older adolescents or adults. Less is known about the potential benefits ...
Carvalho P - - 2010
Systolic time intervals (STI) have shown significant diagnostic and prognostic value to assess the global cardiac function. Their value has been largely established in hospital settings. Currently, STI are considered a promising tool for long-term patient follow-up with chronic cardiovascular diseases. Several technologies exist that enable beat-by-beat assessment of STI ...
Kooter Albertus J - - 2010
Right ventricular dilatation in the setting of acute pulmonary embolism is associated with an adverse prognosis. Treatment with a pulmonary vasodilator has never been studied systematically. We evaluated the effect of epoprostenol on right ventricular diameter and function in patients with acute pulmonary embolism and right ventricular dilatation. In a ...
Mathieu Myrielle - - 2010
Heart failure with preserved left ventricular ejection fraction and abnormal diastolic function is commonly observed after recovery from an acute myocardial infarction. The aim of this study was to investigate the physiopathology of heart failure with preserved ejection fraction in a model of healed myocardial infarction in dogs. Echocardiography, levels ...
O'Hanlon Rory - - 2010
The aetiology and clinical significance of troponin release following endurance exercise is unclear but may be due to transient myocardial inflammation. Cardiovascular magnetic resonance (CMR) affords us the opportunity to evaluate the presence of myocardial inflammation and focal fibrosis and is the ideal imaging modality to study this hypothesis. We ...
Moladoust Hassan - - 2010
More diagnostic techniques require a better understanding of the forces and stresses developed in the wall of the left ventricle. The aim of this study was to differentiate significant coronary artery disease (CAD) patients using a non-invasive quantification of myocardial wall stress in the diastole phase. Sixty male subjects with ...
Ott Brian R - - 2010
The frequent co-occurrence of Alzheimer's disease (AD) pathology in patients with normal pressure hydrocephalus suggests a possible link between ventricular dilation and AD. If enlarging ventricles serve as a marker of faulty cerebrospinal fluid (CSF) clearance mechanisms, then a relationship may be demonstrable between increasing ventricular volume and decreasing levels ...
Steding K - - 2010
Long term endurance training is known to increase peak oxygen uptake (VO2peak) and induce morphological changes of the heart such as increased left ventricular mass (LVM). However, the relationship between and the total heart volume (THV), considering both the left and right ventricular dimensions in both males and females, is ...
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 ...
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 ...
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