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"Cardiac magnetic resonance"

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https://www.readbyqxmd.com/read/28918213/myocardium-at-risk-assessed-by-electrocardiographic-scores-and-cardiovascular-magnetic-resonance-a-mitocare-substudy
#1
Maria Sejersten, Yama Fakhri, Marianne Pape, Svend Eggert Jensen, Einar Heiberg, Henrik Engblom, Trygve S Hall, Dan Atar, Peter Clemmensen
INTRODUCTION: The myocardium at risk (MaR) represents the quantitative ischemic area destined to myocardial infarction (MI) if no reperfusion therapy is initiated. Different ECG scores for MaR have been developed, but there is no consensus as to which should be preferred. OBJECTIVE: Comparisons of ECG scores and Cardiac Magnetic Resonance (CMR) for determining MaR. METHODS: MaR was determined by 3 different ECG scores, and by CMR in ST-segment elevation MI (STEMI) patients from the MITOCARE cardioprotection trial...
August 16, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28916243/feasibility-and-accuracy-of-automated-software-for-transthoracic-three-dimensional-left-ventricular-volume-and-function-analysis-comparisons-with-two-dimensional-echocardiography-three-dimensional-transthoracic-manual-method-and-cardiac-magnetic-resonance-imaging
#2
Gloria Tamborini, Concetta Piazzese, Roberto M Lang, Manuela Muratori, Elisa Chiorino, Massimo Mapelli, Laura Fusini, Sarah Ghulam Ali, Paola Gripari, Gianluca Pontone, Daniele Andreini, Mauro Pepi
BACKGROUND: Recently, a new automated software package (HeartModel) was developed to obtain three-dimensional (3D) left ventricular (LV) volumes using a model-based algorithm (MBA) with a "one-button" simple system and user-adjustable slider. The aims of this study were to verify the feasibility and accuracy of the MBA in comparison with other commonly used imaging techniques in a large unselected population, to evaluate possible accuracy improvements of free operator border adjustments or changes of the slider's default position, and to identify differences in method accuracy related to specific pathologies...
September 12, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28915139/left-and-right-ventricular-morphology-function-and-late-gadolinium-enhancement-extent-and-localization-change-with-different-clinical-presentation-of-acute-myocarditis-data-from-the-italian-multicenter-study-on-myocarditis-itamy
#3
Gianluca Di Bella, Giovanni Camastra, Lorenzo Monti, Santo Dellegrottaglie, Paolo Piaggi, Claudio Moro, Alessia Pepe, Chiara Lanzillo, Gianluca Pontone, Martina Perazzolo Marra, Mauro Di Roma, Alessandra Scatteia, Giovanni D Aquaro
AIMS: Poor data exist about cardiac magnetic resonance (CMR) findings in a large sample of acute myocarditis with different clinical presentations (heart failure, arrhythmias, and infarct-like presentation). METHODS: Five hundred and forty-three in-patients with a clinical suspected of acute myocarditis confirmed by CMR were enrolled. The clinical indications to perform CMR were chest pain and/or dyspnea and/or palpitations, or effort intolerance/malaise in the last month; elevated troponin and/or new ventricular dysfunction, and/or new ECG abnormalities; and suspected inflammatory cause...
September 14, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28914601/left-ventricular-long-axis-function-assessed-with-cardiac-cine-mr-imaging-is-an-independent-predictor-of-all-cause-mortality-in-patients-with-reduced-ejection-fraction-a-multicenter-study
#4
Simone Romano, Robert M Judd, Raymond J Kim, Han W Kim, Igor Klem, John F Heitner, Dipan J Shah, Jennifer Jue, Afshin Farzaneh-Far
Purpose To evaluate the prognostic value of a simple index of left ventricular (LV) long-axis function-lateral mitral annular plane systolic excursion (MAPSE)-in a large multicenter population of patients with reduced ejection fraction (EF) who were undergoing cardiac magnetic resonance (MR) imaging. Materials and Methods This retrospective study included 1040 consecutive patients (mean age, 59.5 years ± 15.8) at four U.S. medical centers who were undergoing cardiac MR imaging for assessment of LV dysfunction with EF less than 50%...
September 14, 2017: Radiology
https://www.readbyqxmd.com/read/28912188/modern-imaging-techniques-in-cardiomyopathies
#5
REVIEW
M Fuad Jan, A Jamil Tajik
Modern advanced imaging techniques have allowed increasingly more rigorous assessment of the cardiac structure and function of several types of cardiomyopathies. In contemporary cardiology practice, echocardiography and cardiac magnetic resonance imaging are widely used to provide a basic framework in the evaluation and management of cardiomyopathies. Echocardiography is the quintessential imaging technique owing to its unique ability to provide real-time images of the beating heart with good temporal resolution, combined with its noninvasive nature, cost-effectiveness, availability, and portability...
September 15, 2017: Circulation Research
https://www.readbyqxmd.com/read/28910586/global-and-regional-cardiac-function-in-lifelong-endurance-athletes-with-and-without-myocardial-fibrosis
#6
Thijs M H Eijsvogels, David L Oxborough, Rory O'Hanlon, Sanjay Sharma, Sanjay Prasad, Greg Whyte, Keith P George, Mathew G Wilson
The aim of the present study was to compare cardiac structure as well as global and regional cardiac function in athletes with and without myocardial fibrosis (MF). Cardiac magnetic resonance imaging with late gadolinium enhancement was used to detect MF and global cardiac structure in nine lifelong veteran endurance athletes (58 ± 5 years, 43 ± 5 years of training). Transthoracic echocardiography using tissue-Doppler and myocardial strain imaging assessed global and regional (18 segments) longitudinal left ventricular function...
September 14, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28905655/inverted-takotsubo-syndrome-in-androctonus-australis-scorpion-envenomation
#7
Fekri Abroug, Islem Ouanes, Mezri Maatouk, Mondher Golli, Lamia Ouanes-Besbes
CONTEXT: The nature of scorpion-related cardiomyopathy is still a matter of debate where specific toxin-induced cardiomyopathy, ischemic, or catecholaminergic cardiomyopathy is advocated as well. We report two cases of Takotsubo syndrome following envenomation by Androctonus australis, bringing new evidence for the fundamental role of catecholamines in the pathogenesis of this cardiomyopathy. Case 1: A woman aged 36 presented with pulmonary edema and shock following scorpion envenomation...
September 14, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28899950/prevalence-and-prognostic-significance-of-left-ventricular-noncompaction-in-patients-referred-for-cardiac-magnetic-resonance-imaging
#8
Alexander Ivanov, Devindra S Dabiesingh, Geetha P Bhumireddy, Ambreen Mohamed, Ahmed Asfour, William M Briggs, Jean Ho, Saadat A Khan, Alexandra Grossman, Igor Klem, Terrence J Sacchi, John F Heitner
BACKGROUND: Presence of prominent left ventricular trabeculation satisfying criteria for left ventricular noncompaction (LVNC) on routine cardiac magnetic resonance examination is frequently encountered; however, the clinical and prognostic significance of these findings remain elusive. This registry aimed to assess LVNC prevalence by 4 current criteria and to prospectively evaluate an association between diagnosis of LVNC by these criteria and adverse events. METHODS AND RESULTS: There were 700 patients referred for cardiac magnetic resonance: 42% were women, median age was 70 years (range, 45-71 years), mean left ventricular ejection fraction was 51% (±17%), and 32% had late gadolinium enhancement on cardiac magnetic resonance...
September 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28894472/effective-heart-disease-detection-based-on-quantitative-computerized-traditional-chinese-medicine-using-representation-based-classifiers
#9
Ting Shu, Bob Zhang, Yuan Yan Tang
At present, heart disease is the number one cause of death worldwide. Traditionally, heart disease is commonly detected using blood tests, electrocardiogram, cardiac computerized tomography scan, cardiac magnetic resonance imaging, and so on. However, these traditional diagnostic methods are time consuming and/or invasive. In this paper, we propose an effective noninvasive computerized method based on facial images to quantitatively detect heart disease. Specifically, facial key block color features are extracted from facial images and analyzed using the Probabilistic Collaborative Representation Based Classifier...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28888268/a-randomized-multicenter-open-label-blinded-end-point-trial-comparing-the-effects-of-spironolactone-to-chlorthalidone-on-left-ventricular-mass-in-patients-with-early-stage-chronic-kidney-disease-rationale-and-design-of-the-spiro-ckd-trial
#10
Manvir K Hayer, Nicola C Edwards, Gemma Slinn, William E Moody, Rick P Steeds, Charles J Ferro, Anna M Price, Cecilio Andujar, Mary Dutton, Rachel Webster, David J Webb, Scott Semple, Iain MacIntyre, Vanessa Melville, Ian B Wilkinson, Thomas F Hiemstra, David C Wheeler, Anna Herrey, Margaret Grant, Samir Mehta, Natalie Ives, Jonathan N Townend
BACKGROUND: Chronic kidney disease (CKD) is associated with increased left ventricular (LV) mass and arterial stiffness. In a previous trial, spironolactone improved these end points compared with placebo in subjects with early-stage CKD, but it is not known whether these effects were specific to the drug or secondary to blood pressure lowering. AIM: The aim was to investigate the hypothesis that spironolactone is superior to chlorthalidone in the reduction of LV mass while exerting similar effects on blood pressure...
September 2017: American Heart Journal
https://www.readbyqxmd.com/read/28887316/prognostic-value-of-aortic-stiffness-in-patients-after-st-elevation-myocardial-infarction
#11
Hans-Josef Feistritzer, Gert Klug, Sebastian J Reinstadler, Martin Reindl, Lea Niess, Timo Nalbach, Christian Kremser, Agnes Mayr, Bernhard Metzler
BACKGROUND: High aortic stiffness has been shown to be a strong predictor of morbidity and mortality in the general population and several patient cohorts. However, in patients after ST-elevation myocardial infarction, the prognostic value of high aortic stiffness is unknown so far. METHODS AND RESULTS: This prospective observational study included 160 consecutive patients with first acute ST-elevation myocardial infarction. Aortic pulse wave velocity (PWV) was measured 2 (interquartile range 2-4 days) days after infarction using cardiac magnetic resonance imaging...
September 8, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28886885/segmentation-of-the-right-ventricle-in-four-chamber-cine-cardiac-mr-images-using-polar-dynamic-programming
#12
Jose A Rosado-Toro, Aiden Abidov, Maria I Altbach, Isabel B Oliva, Jeffrey J Rodriguez, Ryan J Avery
The four chamber plane is currently underutilized in the right ventricular segmentation community. Four chamber information can be useful to determine ventricular short axis stacks and provide a rough estimate of the right ventricle in short axis stacks. In this study, we develop and test a semi-automated technique for segmenting the right ventricle in four chamber cine cardiac magnetic resonance images. The three techniques that use minimum cost path algorithms were used. The algorithms are: Dijkstra's shortest path algorithm (Dijkstra), an A* algorithm that uses length, curvature and torsion into an active contour model (ALCT), and a variation of polar dynamic programming (PDP)...
August 18, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28885371/clinical-and-diagnostic-features-of-angiosarcoma-with-pulmonary-metastases-a-retrospective-observational-study
#13
Hanping Wang, Juhong Shi, Hongrui Liu, Yeye Chen, Yining Wang, Wenze Wang, Li Zhang
Angiosarcoma with pulmonary metastasis is a rare, fatal disease that often presents with multiple pulmonary nodules and diffuse alveolar hemorrhage. We herein review the detailed clinical characteristics of pulmonary metastatic angiosarcoma and determine a reasonable diagnostic strategy.The medical records of 11 patients with pulmonary angiosarcoma were reviewed.The mean age of the patients was 45.7 years (range, 30-71 years). All patients were male. The most common symptom was hemoptysis (8/11). Common initial misdiagnoses were tuberculosis (5/11), vasculitis (2/11), nontuberculous infectious disease (1/11), and constrictive pericarditis (1/11)...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28884216/standardized-unfold-mapping-a-technique-to-permit-left-atrial-regional-data-display-and-analysis
#14
Steven E Williams, Catalina Tobon-Gomez, Maria A Zuluaga, Henry Chubb, Constantine Butakoff, Rashed Karim, Elena Ahmed, Oscar Camara, Kawal S Rhode
PURPOSE: Left atrial arrhythmia substrate assessment can involve multiple imaging and electrical modalities, but visual analysis of data on 3D surfaces is time-consuming and suffers from limited reproducibility. Unfold maps (e.g., the left ventricular bull's eye plot) allow 2D visualization, facilitate multimodal data representation, and provide a common reference space for inter-subject comparison. The aim of this work is to develop a method for automatic representation of multimodal information on a left atrial standardized unfold map (LA-SUM)...
September 7, 2017: Journal of Interventional Cardiac Electrophysiology: An International Journal of Arrhythmias and Pacing
https://www.readbyqxmd.com/read/28882338/relationship-of-cardiorespiratory-fitness-and-adiposity-with-left-ventricular-strain-in-middle-age-adults-from-the-dallas-heart-study
#15
Ambarish Pandey, Bryan Park, Spencer Martens, Colby Ayers, Ian J Neeland, Mark J Haykowsky, Michael D Nelson, Satyam Sarma, Jarett D Berry
Low cardiorespiratory fitness (CRF) and obesity are significant risk factors for heart failure (HF). However, given the inverse association between CRF and obesity, the independent contributions of low CRF and adiposity toward HF risk are not well established. We evaluated the association of CRF and measures of adiposity with left ventricular (LV) peak systolic strain-a subclinical measure of LV dysfunction-among the Dallas Heart Study phase II participants without cardiovascular disease who had CRF estimated using a submaximal treadmill test and LV systolic circumferential strain assessment by tissue-tagged cardiac magnetic resonance imaging...
July 25, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28882227/left-atrial-fibrosis-and-risk-of-cerebrovascular-and-cardiovascular-events-in-patients-with%C3%A2-atrial-fibrillation
#16
Jordan B King, Peyman N Azadani, Promporn Suksaranjit, Adam P Bress, Daniel M Witt, Frederick T Han, Mihail G Chelu, Michelle A Silver, Joseph Biskupiak, Brent D Wilson, Alan K Morris, Eugene G Kholmovski, Nassir Marrouche
BACKGROUND: Severity of left atrial (LA) fibrosis is a strong predictor of atrial fibrillation (AF) ablation success and has been associated with a history of stroke, hypertension, and heart failure (HF). However, it is unclear whether more severe LA fibrosis independently increases the risk of major adverse cardiovascular and cerebrovascular events (MACCE) among those with AF. OBJECTIVES: The goal of this study was to evaluate the occurrence and frequency of MACCE by strata of LA fibrosis severity in patients with AF...
September 12, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28880152/an-open-benchmark-challenge-for-motion-correction-of-myocardial-perfusion-mri
#17
Beau Pontre, Brett R Cowan, Edward DiBella, Sancgeetha Kulaseharan, Devavrat Likhite, Nils Noorman, Lennart Tautz, Nicholas Tustison, Gert Wollny, Alistair A Young, Avan Suinesiaputra
Cardiac magnetic resonance perfusion examinations enable noninvasive quantification of myocardial blood flow. However, motion between frames due to breathing must be corrected for quantitative analysis. Although several methods have been proposed, there is a lack of widely available benchmarks to compare different algorithms. We sought to compare many algorithms from several groups in an open benchmark challenge. Nine clinical studies from two different centers comprising normal and diseased myocardium at both rest and stress were made available for this study...
September 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28878578/single-breath-hold-evaluation-of-cardiac-function-with-use-of-time-resolved-parallel-cardiac-magnetic-resonance
#18
Patrick Krumm, Jonas D Keuler, Stefanie Mangold, Tanja Zitzelsberger, Christer A Ruff, Bernhard D Klumpp, Petros Martirosian, Konstantin Nikolaou, Christof Burgstahler, Ulrich Kramer
Using cardiac magnetic resonance, we tested whether a single-breath-hold approach to cardiac functional evaluation was equivalent to the established multiple-breath-hold method. We examined 39 healthy volunteers (mean age, 31.9 ± 11.4 yr; 22 men) by using 1.5 T with multiple breath-holds and our proposed single breath-hold. Left ventricular and right ventricular ejection fractions (LVEF and RVEF), LV and RV end-diastolic volumes (LVEDV and RVEDV), and LV myocardial mass (LVMM) were compared by using Bland-Altman plots; LVEF and RVEF were tested for equivalence by inclusion of 95% confidence intervals (CIs)...
August 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28878319/revisiting-myocardial-necrosis-biomarkers-assessment-of-the-effect-of-conditioning-therapies-on-infarct-size-by-kinetic-modelling
#19
David Ternant, Fabrice Ivanes, Fabrice Prunier, Nathan Mewton, Theodora Bejan-Angoulvant, Gilles Paintaud, Michel Ovize, Denis Angoulvant
Infarct size is a major predictor of subsequent cardiovascular events following ST-segment elevation myocardial infarction (STEMI) and is frequently used in clinical trials focused on cardioprotection. Approximately assessed through serial blood sampling, it can be accurately measured by imaging techniques, e.g. cardiac magnetic resonance imaging, which is the actual gold standard for infarct size determination but with limited availability in daily practice. We developed a mathematical biomarker kinetic model based on pharmacokinetic compartment models to easily and accurately estimate infarct size using individual data from five clinical trials evaluating the impact of conditioning therapies in STEMI between 2005 and 2013...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28874821/sprint-interval-training-decreases-left-ventricular-glucose-uptake-compared-to-moderate-intensity-continuous-training-in-subjects-with-type-2-diabetes-or-prediabetes
#20
Marja A Heiskanen, Tanja J Sjöros, Ilkka H A Heinonen, Eliisa Löyttyniemi, Mikko Koivumäki, Kumail K Motiani, Jari-Joonas Eskelinen, Kirsi A Virtanen, Juhani Knuuti, Jarna C Hannukainen, Kari K Kalliokoski
Type 2 diabetes mellitus (T2DM) is associated with reduced myocardial glucose uptake (GU) and increased free fatty acid uptake (FFAU). Sprint interval training (SIT) improves physical exercise capacity and metabolic biomarkers, but effects of SIT on cardiac function and energy substrate metabolism in diabetic subjects are unknown. We tested the hypothesis that SIT is more effective than moderate-intensity continuous training (MICT) on adaptations in left and right ventricle (LV and RV) glucose and fatty acid metabolism in diabetic subjects...
September 5, 2017: Scientific Reports
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