Search Results
 Results 201 - 250 of 750 < 1 2 3 4 5 6 7 8 9 10 > 201 Chen Yueh-Chung - - 2013 Diagnosis of coronary artery disease requires invasive procedures that are typically not implemented until clinical warning signs are apparent. The goal of this study was to determine the relation between the severity of coronary artery disease, as measured by the SYNTAX scoring system, with serum levels of fetuin-A and fibroblast growth ... 202 Rashidinejad H - - 2013 OBJECTIVE. Much attention has recently been focused on the underlying role of circulating inflammatory biomarkers such as high-sensitivity C-reactive protein for predicting cardiovascular disease progression. We therefore set out to assess the relationship between the value of high-sensitivity C-reactive protein and (i) coronary artery disease severity, and (ii) left ventricular ... 203 Chik William W B - - 2013  BACKGROUND: Radiofrequency (RF) ablation causes thermal mediated irreversible myocardial necrosis. This study aimed to (i) characterize the thermal characteristics of RF ablation lesions with high spatial resolution using a thermochromic liquid crystal (TLC) myocardial phantom; and (ii) compare the thermochromic lesions with in vivo and in vitro ablation lesions. The ... 204 Obiagwu Chukwudi - - 2013 Left atrial (LA) abnormality, an easily quantifiable parameter of left ventricular (LV) diastolic dysfunction, has been associated with cardiovascular risk. Because during myocardial perfusion study (MPS), the abnormal LV activation pattern in patients with left bundle branch block (LBBB) frequently induces perfusion defects, a clinical correlate of early myocardial ischemia ... 205 Petersen John W - - 2013 BACKGROUND: Standard measures of left ventricular systolic and diastolic function often fail to identify left ventricular dysfunction in patients with heart failure and do not correlate with measures of functional capacity.Aim: To determine if speckle tracking echocardiography (STE)--determined measures of global and regional myocardial contractility have a linear association with ... 206 Prasad Aditya - - 2013 Objective: To compare the use of regadenoson to adenosine for measurement of fractional flow reserve (FFR). Background: FFR is an accepted method to assess the functional significance of intermediate coronary artery stenoses and uses adenosine to induce maximal hyperemia. The use of the selective A2a receptor agonist regadenoson for FFR ... 207 Chirife Raul - - 2013 BACKGROUND: Our objective was to evaluate the systolic index (SI), the ratio between rate-corrected left ventricular ejection time (LVETc), and a preejection period surrogate (PEPsu), to assess cardiac function in patients with DDD and cardiac resynchronization therapy (CRT) pacemakers. METHODS: LVETc and PEPsu were automatically measured from electrocardiogram and finger ... 208 Fortunato Orazio - - 2013 AIMS: Following an acute myocardial infarction (AMI), pro-angiogenic PCs are released from the bone marrow into the circulation and home to the ischemic site attracted by a chemokine gradient. It is unknown if components of this early homeostatic response might help forecast long-term clinical outcome. This study investigates if the ... 209 Senior Roxy - - 2013 OBJECTIVE: To compare sulphur hexafluoride microbubble (SonoVue)-enhanced myocardial contrast echocardiography (MCE) with single-photon-emission computed tomography (SPECT) relative to coronary angiography (CA) for assessment of coronary artery disease (CAD). BACKGROUND: Small-scale studies have shown that myocardial perfusion assessed by SonoVue-enhanced MCE is a viable alternative to SPECT for CAD assessment. However, ... 210 Naujorks Alexandre Antonio - - 2013 INTRODUCTION: Diastolic dysfunction may occur in fetuses with intrauterine growth restriction (IUGR) and may be assessed by myocardial tissue Doppler (MTD). We previously have shown that excursion index of the septum primum (EISP) is reduced in IUGR fetuses over 30 weeks because of a higher left atrial pressure. PATIENTS, SETTING, AND ... 211 Li Dong-Ye - - 2013 BACKGROUND: Real-time (RT) myocardial contrast echocardiography (MCE) is a novel method for the assessment of regional myocardial perfusion. We sought to evaluate the feasibility and diagnostic accuracy of quantitative RT-MCE in predicting significant coronary stenosis, with reference to quantitative coronary angiography. HYPOTHESIS: RT-MCE can identify anatomically significant coronary artery stenosis ... 212 Vietta Giovanna Grunewald - - 2013 AIMS: Evaluating myocardial infarct (MI) size prior to intervention is fundamental to ensure accurate results in experimental studies. However, this assessment is performed at late time points. We aimed to evaluate whether measuring plasma cardiac troponin I (cTnI) and performing echocardiographic assessment at earlier time points can predict the occurrence ... 213 Porto Italo - - 2013 Endothelial progenitor cells (EPCs) are released from the bone marrow during cardiac ischemic events, potentially influencing vascular and myocardial repair. We assessed the clinical and angiographic correlates of EPC mobilization at the time of primary percutaneous coronary intervention in 78 patients with ST elevation myocardial infarction and the impact of ... 214 Wu Alan H B - - 2013 BACKGROUND: Galectin-3 and soluble ST2 (sST2) are novel serum biomarkers of chronic heart failure. METHODS AND RESULTS: The biological variability of galectin-3 and sST2 was measured from a cohort of 17 healthy subjects where blood was taken once every 2 weeks for 8 weeks (n = 4 samples) and from ... 215 Osuga Tatsuyuki - - 2013 Objective-To evaluate left atrial phasic function in healthy dogs by means of 2-D speckle tracking echocardiography with time-left atrial area curve analysis and to assess repeatability and reproducibility of obtained measurements. Animals-6 healthy Beagles. Procedures-Each dog underwent echocardiography twice on different days (3 nonconsecutive examinations/d). Images were analyzed with offline ... 216 Doyle Mark - - 2013 To assess the prognostic value of a left ventricular energy-model in women with suspected myocardial ischemia. The prognostic value of internal energy utilization (IEU) of the left ventricle in women with suspected myocardial ischemia is unknown. Women (n=227, mean age 59±12 years, range 31-86), with symptoms of myocardial ischemia, underwent ... 217 Layland Jamie J West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital, Glasgow, United Kingdom. - - 2013 The use of fractional flow reserve in patients with non-ST-segment-elevation myocardial infarction (NSTEMI) is a controversial issue. We undertook a study to assess the vasodilatory capacity of the coronary microcirculation in patients with NSTEMI when compared with a model of preserved microcirculation (stable angina [SA] cohort: culprit and nonculprit vessel) ... 218 Bergenzaun Lill - - 2013 BACKGROUND: Assessing left ventricular (LV) dysfunction by echocardiography in ICU patients is common. The aim of this study was to investigate mitral annular plane systolic excursion (MAPSE) in critically ill patients with shock and its relation to LV systolic and diastolic function, myocardial injury and to outcome. METHODS: In a ... 219 de Graaf Michiel A - - 2013 PURPOSE: Automated software tools have permitted more comprehensive, robust and reproducible quantification of coronary stenosis, plaque burden and plaque location of coronary computed tomography angiography (CTA) data. The association between these quantitative CTA (QCT) parameters and the presence of myocardial ischaemia has not been explored. The aim of the present ... 220 Sanidas Elias - - 2013 The fact that coronary angiography has limitations in terms of precise estimation and progression of atherosclerosis has been partially overcome during the last years by the use of new techniques. Catheter-based invasive modalities are of a profound clinical importance in regard to accurate assessment of coronary anatomy and physiology and ... 221 Gutstein Ariel - - 2013 BACKGROUND: We previously described the feasibility of performing myocardial perfusion imaging (MPI) with half the technetium (Tc-99m) activity using ordered-subset expectation maximization with resolution recovery (OSEM-RR) processing. This study sought to assess the accuracy of this technique by correlating the findings with coronary angiography. METHODS: Of 290 patients who underwent ... 222 Arsanjani Reza - - 2013 OBJECTIVE: We aimed to improve the diagnostic accuracy of myocardial perfusion SPECT (MPS) by integrating clinical data and quantitative image features with machine learning (ML) algorithms. METHODS: 1,181 rest (201)Tl/stress (99m)Tc-sestamibi dual-isotope MPS studies [713 consecutive cases with correlating invasive coronary angiography (ICA) and suspected coronary artery disease (CAD) and ... 223 Afzali Dariush - - 2013 BACKGROUND: The aim of the current study was to evaluate the diagnostic and intermediate-term prognostic impact of C-terminal portion of provasopressin (copeptin) in combination with troponin I. METHODS: In this prospective single-center study we recruited a total of 230 unselected patients with suspected recent acute coronary syndrome (ACS) presenting consecutively ... 224 Galeotti Loriano - - 2013 AIMS: Left bundle branch block (LBBB) is a critical predictor of patient benefit from cardiac resynchronization therapy (CRT), but recent studies suggest that one-third of patients diagnosed with LBBB by conventional electrocardiographic (ECG) criteria may have a false-positive diagnosis. In this study, we tested the hypothesis that recently proposed strict ... 225 Aljaroudi Wael A - - 2013 Left ventricular diastolic dysfunction is recognized as an important contributor to diastolic heart failure and is associated with increased morbidity and mortality. The evaluation of diastolic function has become an integral part of a full echocardiographic study and is recommended by the current guidelines of the American Society of Echocardiography ... 226 Wilson Ryan E - - 2013 OBJECTIVE: ST-elevation myocardial infarction (STEMI) identification by emergency medicine services (EMS) leading to pre-hospital catheterization laboratory (CL) activation shortens ischemic time and improves outcomes. We examined the incremental value of addition of a screening clinical tool (CT), containing clinical information and a Zoll electrocardiogram (ECG)-resident STEMI identification program (ZI) to ... 227 Arias Teresa - - 2013 BACKGROUND: Clinical two-dimensional (2D) and clinical three-dimensional echocardiography are validated against cardiac magnetic resonance imaging (CMR), the gold standard for left ventricular (LV) volume measurement. In rodents, there is no widely accepted echocardiographic measure of whole LV volumes, and CMR measurements vary among studies. The aim of this study was ... 228 Arnold Jayanth R - - 2013 BACKGROUND: REVASCULARIZATION STRATEGIES FOR MULTIVESSEL CORONARY ARTERY DISEASE INCLUDE PERCUTANEOUS CORONARY INTERVENTION AND CORONARY ARTERY BYPASS GRAFTING. IN THIS STUDY, WE COMPARED THE COMPLETENESS OF REVASCULARIZATION AS ASSESSED BY CORONARY ANGIOGRAPHY AND BY QUANTITATIVE SERIAL PERFUSION IMAGING USING CARDIOVASCULAR MAGNETIC RESONANCE.METHODS AND RESULTS: PATIENTS WITH MULTIVESSEL CORONARY DISEASE WERE RECRUITED ... 229 Xia Wei - - 2013 The aim of this study was to compare the correlation and consistency of left ventricular ejection fraction (LVEF) obtained by ECG-gated myocardial perfusion SPET (GMPS) using the four formulas (R0-R3) in ECToolbox software and by equilibrium radionuclide ventriculography (ERNV), and determine the optimal diagnostic thresholds of the four formulas in ... 230 Ikenaga Hiroki - - 2013 BACKGROUND: Distal embolization during percutaneous coronary intervention (PCI) may deteriorate microvascular reperfusion in patients with ST-elevation myocardial infarction (STEMI). Reperfusion at the coronary microvascular level is important for STEMI and culprit plaque is associated with distal embolization and microvascular reperfusion. ST-segment resolution (ST-R) in the electrocardiogram reflects microvascular reperfusion after ... 231 Rodrigues Sérgio Lamêgo - - 2013 BACKGROUND: According to hypertension guidelines, the recommended electrocardiographic (ECG) diagnostic criteria for left ventricular hypertrophy (LVH) are the Sokolow-Lyon and Cornel voltage criteria, both with general acceptance by primary care physicians. However, it was recently reported that the R-wave voltage in lead aVL (RaVL) was as good as other more ... 232 Nowinski Wieslaw L - - 2013 OBJECTIVES: Sensitivity of noncontrast computed tomography (NCCT) in detecting hyperacute (<8 hours) and acute (<24 hours) cerebral infarction is low. We propose an automatic method to detect and localize ischemic infarct and to assess its volume from a single NCCT scan. MATERIALS AND METHODS: The method automatically determines attenuation value ... 233 Amanieu Charles - - 2013 OBJECTIVE: To evaluate the capabilities of delayed enhanced multidetector CT (DE-MDCT), performed immediately after percutaneous coronary intervention (PCI), in predicting myocardial microvascular obstruction (MVO) formation assessed by delayed enhanced MRI (DE-MRI). METHODS: Thirty-two patients presenting with a primary acute myocardial infarction, successfully recanalised by PCI, underwent a DE-MDCT immediately after ... 234 Mannacio Vito - - 2013 OBJECTIVESLeft ventricular (LV) diastolic dysfunction after aortic valve replacement (AVR) carries a substantial risk of development of heart failure and reduced survival. In addition to echocardiography, B-type natriuretic peptide (BNP) provides a powerful incremental assessment of diastolic function. This study evaluates BNP as a marker of LV diastolic dysfunction in ... 235 Kou Nancy N Sobell Department of Motor Neuroscience, UCL Institute of Neurology, London, UK. - - 2013 We compared manual infarct definition, which is time-consuming and open to bias, with an automated abnormal tissue detection method in measuring corticospinal tract-infarct overlap volumes in chronic stroke patients to help predict motor outcome. Using diffusion tensor imaging and probabilistic tractography, 4 corticospinal tracts from the primary motor cortex, dorsal ... 236 Donoho David L - - 2013 Let $${X}_{0}$$ be an unknown M by N matrix. In matrix recovery, one takes $$n linear measurements$${y}_{1},\dots ,{y}_{n}$$of$${X}_{0}$$, where$${y}_{i}=\hbox{ Tr }\left({A}_{i}^{T}{X}_{0}\right)$$and each$${A}_{i} is an M by N matrix. A popular approach for matrix recovery is nuclear norm minimization (NNM): solving the convex optimization problem ... 237 Lopes Renato D - - 2013 BACKGROUND: Larger infarct size measured by creatine kinase (CK)-MB release is associated with higher mortality and has been used as an important surrogate endpoint in the evaluation of new treatments for ST-segment elevation myocardial infarction (STEMI). Traditional approaches to quantify infarct size include the observed CK-MB peak and calculated CK-MB ... 238 Weeks Phillip A - - 2013 Bivalirudin has emerged as a suitable alternative anticoagulant to unfractionated heparin and low-molecular-weight heparins during percutaneous coronary intervention (PCI) procedures in the management of coronary artery disease and acute coronary syndromes (ACS). In clinical trials, bivalirudin dosing was standardized, and activated clotting time (ACT) did not influence dosing adjustments. The ... 239 Remmelink M - - 2013 Coronary microvascular resistance is increased after primary percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI), which may be related in part to changed left ventricular (LV) dynamics. Therefore we studied the coronary microcirculation in relation to systolic and diastolic LV function after STEMI. The study cohort consisted of 12 ... 240 Min James K - - 2013 Coronary CT angiography (CTA) has emerged as an effective noninvasive method for direct visualization of the coronary arteries, with high diagnostic performance compared with invasive coronary angiography (ICA). However, coronary CTA is prone to artifacts, including coronary motion, which may reduce its diagnostic performance. Intracycle motion compensation algorithms (MCAs) from ... 241 Singh Harmandeep - - 2013 BACKGROUND: Data on normal parameters of cardiac mechanical synchrony is limited, variable and obtained from small cohorts till date. In most studies, software used for such assessment has not been mentioned. The aim of study is to establish normal values of mechanical synchrony with equilibrium radionuclide angiography (ERNA) in a ... 242 Noichri Yosri - - 2013 BACKGROUND: An imbalance between pro-oxidants and antioxidant systems has been suggested to be implicated in the physiopathology of acute myocardial infarction (AMI). We aimed to evaluate the antioxidant capacity in Tunisian patients and to assess the possible relationship between erythrocyte catalase enzyme activity and hyperhomocysteinaemia. METHODS: 108 patients with AMI ... 243 Liu Chung-Pin - - 2013 Multidetector-row computed tomography (MDCT) has become one of the major tools in diagnosing and evaluating patients with coronary artery disease in recent years. In selected patients, MDCT has been shown to provide more reliable accuracy in detection of stent patency than invasive coronary angiography. Chiou et al reported a delicate ... 244 de Waha Suzanne - - 2013 BACKGROUND: Current guidelines recommend thrombus aspiration in patients with ST-elevation myocardial infarction (STEMI); however, there are insufficient data to unequivocally support thrombectomy in patients with non-STEMI (NSTEMI). METHODS: The TATORT-NSTEMI (Thrombus Aspiration in ThrOmbus containing culpRiT lesions in Non-ST-Elevation Myocardial Infarction) trial is a prospective, controlled, multicenter, randomized, open-label trial ... 245 Rutz Tobias - - 2013 BACKGROUND: Chronic heart transplant rejection, i.e. cardiac allograft vasculopathy (CAV) is a major adverse prognostic factor after heart transplantation (HTx). This study tested the hypothesis that the relative myocardial blood volume (rBV) as quantified by myocardial contrast echocardiography accurately detects severe CAV as defined by coronary intravascular ultrasound (IVUS). METHODS ... 246 Paarup Dridi Nadia - - 2013 Objectives: We investigated the relationship between coagulation assessed by thromboelastography (TEG) and myocardial damage in ST-segment elevation myocardial infarction (STEMI). Methods: We measured platelet activity with TEG-maximum amplitude (TEG-MA) in 233 patients undergoing urgent percutaneous coronary intervention (PCI). Infarct size and myocardial salvage index were evaluated using cardiac magnetic resonance, ... 247 Katritsis Demosthenes G - - 2013 Sequence of retrograde atrial activation is not a reliable criterion for the classification of atrioventricular nodal re-entrant tachycardia (AVNRT) into typical and atypical types. The conventional concept of a lower common pathway is not supported by current evidence and does not represent a reliable or reproducible criterion. The distinction between ... 248 Acampa Wanda - - 2013 Revascularization procedures, including percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG), are performed in many patients with coronary artery disease. Despite the effectiveness of these procedures, different follow-up strategies need to be considered for the management of patients after revascularization. Stress myocardial perfusion single-photon emission computed tomography (MPS) ... 249 Hoeller Rebeca - - 2013 OBJECTIVE: To analyse whether levels of high-sensitivity cardiac troponin (hs-cTn) below their respective 99th percentile can be used as a single parameter to rule out acute myocardial infarction (AMI) at presentation. DESIGN: Prospective, multicentre study. MAIN OUTCOME MEASURES: We measured hs-cTn using four different methods (hs-cTnT Roche, hs-cTnI Siemens, hs-cTnI ... 250 Wu Yin - - 2013 Nonmonoexponential diffusion behavior has been previously reported to exist in some biological tissues, making quantification of diffusion tensor imaging (DTI) indices dependent on diffusion sensitivity of b-value. This study aims to investigate the effect of b-value in revealing postinfarct myocardial microstructural remodeling in ex vivo hearts. DTI scans were performed ... < 1 2 3 4 5 6 7 8 9 10 >