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https://www.readbyqxmd.com/read/29673853/biventricular-dyssynchrony-on-cardiac-magnetic-resonance-imaging-and-its-correlation-with-myocardial-deformation-ventricular-function-and-objective-exercise-capacity-in-patients-with-repaired-tetralogy-of-fallot
#1
Pantelis Kalaitzidis, Stefan Orwat, Aleksander Kempny, Radke Robert, Brigitte Peters, Samir Sarikouch, Philipp Beerbaum, Helmut Baumgartner, Gerhard-Paul Diller
BACKGROUND: Electrical dyssynchrony and prolonged QRS duration are common in patients with repaired tetralogy of Fallot (ToF). It has been linked to increased risk of sudden cardiac death and right ventricular (RV) dysfunction. We investigated myocardial dyssynchrony using cardiac magnetic resonance imaging (CMR) and feature tracking analysis (FT) in this setting and compared it to myocardial deformation, conventional parameters of ventricular dysfunction and clinical parameters. METHODS AND RESULTS: Patients underwent standardized CMR investigations as part of a nationwide study...
April 12, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29669563/a-comparison-of-both-dense-and-feature-tracking-techniques-with-tagging-for-the-cardiovascular-magnetic-resonance-assessment-of-myocardial-strain
#2
J Jane Cao, Nora Ngai, Lynette Duncanson, Joshua Cheng, Kathleen Gliganic, Qizhi Chen
BACKGROUND: Myocardial strain is increasingly recognized as an important assessment for myocardial function. In addition, it also improves outcome prediction. However, there is lack of standardization in strain evaluation by cardiovascular magnetic resonance (CMR). In this study we compared strain values using multiple techniques and multiple vendor products. METHODS: Prospectively recruited patients with cardiomyopathy of diverse etiology (N = 77) and healthy controls (N = 10) underwent CMR on a 1...
April 19, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29668609/the-success-of-opening-single-chronic-total-occlusion-lesions-to-improve-myocardialviabilitytrial-sos-comedy-study-protocol-of-a-prospective-multicenter-study
#3
Rongchong Huang, Xiantao Song, Haishan Zhang, Wen Tian, Zheng Huang, Xingwei Zhang, Junqing Yang, Dongfeng Zhang, Jian Wu, Lei Zhong, Henry H Ting
AIMS: Success of opening single (SOS)-comedy is a prospective multicenter study to compare the improvement in the decrease of myocardial viability by percutaneous coronary intervention (PCI) with that by optimal medical therapy (OMT) alone in patients with chronic total occlusion (CTO) of a single coronary artery. METHODS AND RESULTS: The risks and the benefits of both options (PCI and OMT) were listed in a CTO decision aid (DA). Eligible participants detected by invasive coronary angiography (ICA) or coronary computed tomography angiography (CCTA) were divided into PCI or OMT groups according to patients' choice after shared-decision making process with DA...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29663442/complexity-of-scar-and-ventricular-arrhythmias-in-dilated-cardiomyopathy-of-any-etiology-long-term-data-from-the-scarfear-cardiovascular-magnetic-resonance-predictors-of-appropriate-implantable-cardioverter-defibrillator-therapy-delivery-registry
#4
Stefano Pedretti, Sara Vargiu, Matteo Baroni, Santo Dellegrottaglie, Barbara Lanzarin, Alberto Roghi, Angela Milazzo, Giuseppina Quattrocchi, Maurizio Lunati, Patrizia Pedrotti
BACKGROUND: Late gadolinium enhancement (LGE) assessed with cardiovascular magnetic resonance (CMR) correlates with ventricular arrhythmias and survival in patients with structural heart disease. Whether some LGE characteristics may specifically improve prediction of arrhythmic outcomes is unknown. HYPOTHESIS: We sought to evaluate scar characteristics assessed with CMR to predict implantable cardioverter-defibrillator (ICD) interventions in dilated cardiomyopathy of different etiology...
April 17, 2018: Clinical Cardiology
https://www.readbyqxmd.com/read/29662919/development-and-clinical-validation-of-a-hybrid-method-for-semiautomated-left-ventricle-endocardial-and-epicardial-boundary-extraction-on-cine-magnetic-resonance-images
#5
Mahammed Messadi, Abdelhafid Bessaid, Denis Mariano-Goulart, Fayçal Ben Bouallègue
We describe a hybrid method for left ventricle (LV) endocardial and epicardial segmentation on cardiac magnetic resonance (CMR) images requiring minimal operator intervention. Endocardium extraction results from the union of three independent estimations based on adaptive thresholding, region growing, and active contour with Chan-Vese energy function. Epicardium segmentation relies on conditional morphological dilation of the endocardial mask followed by active contour optimization. The proposed method was first evaluated using an open access database of 18 CMR for which expert manual contouring was available...
April 2018: Journal of Medical Imaging
https://www.readbyqxmd.com/read/29656636/brainstem-correlates-of-comodulation-masking-release-for-speech-in-normal-hearing-adults
#6
Soheila Rostami, Abdollah Moossavi, Mohsen Ahadi, Shohreh Jalaei
Background and Objectives: Weak signals embedded in fluctuating masker can be perceived more efficiently than similar signals embedded in unmodulated masker. This release from masking is known as comodulation masking release (CMR). In this paper, we investigate, neural correlates of CMR in the human auditory brainstem. Subjects and Methods: A total of 26 normal hearing subjects aged 18-30 years participated in this study. First, the impact of CMR was quantified by a behavioral experiment...
April 17, 2018: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/29653353/a-statistical-shape-model-of-the-left-ventricle-from-real-time-3d-echocardiography-and-its-application-to-myocardial-segmentation-of-cardiac-magnetic-resonance-images
#7
M C Carminati, C Piazzese, M Pepi, G Tamborini, P Gripari, G Pontone, R Krause, A Auricchio, R M Lang, E G Caiani
OBJECT: We present in this paper the application of a statistical shape model of the left ventricle (LV) built from transthoracic real time 3D echocardiography (3DE) to segment the LV endocardium and epicardium in cardiac magnetic resonance (CMR) images. MATERIAL AND METHODS: The LV model was built from a training database constituted by over 9000 surfaces obtained from retrospectively selected 3DE examination of 435 patients with various pathologies. Three-dimensional segmentation of the endocardium and the epicardium was obtained by processing CMR images acquired in 30 patients with a dedicated active shape modelling (ASM) algorithm using the proposed LV model...
March 30, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29652902/relations-between-right-ventricular-morphology-and-clinical-electrical-and-genetic-parameters-in-brugada-syndrome
#8
Belinda Gray, Ganesh Kumar Gnanappa, Richard D Bagnall, Giuseppe Femia, Laura Yeates, Jodie Ingles, Charlotte Burns, Rajesh Puranik, Stuart M Grieve, Christopher Semsarian, Raymond W Sy
BACKGROUND: Increasing evidence suggests the presence of structural changes affecting the right ventricular outflow tract (RVOT) in patients with Brugada Syndrome (BrS). The aim of this study was to characterise the RV morphology in BrS and explore associations between morphologic, clinical, electrical, and genetic parameters using non-invasive multimodality testing. METHODS: Consecutive BrS patients (recruited 2013-2015) underwent clinical assessment, dedicated RV imaging using cardiac magnetic resonance (CMR) imaging (unless contra-indicated), electrical assessment (electrocardiogram, Holter monitoring, signal-averaged ECG[SAECG]) and genotyping...
2018: PloS One
https://www.readbyqxmd.com/read/29644953/dietary-patterns-and-cardiometabolic-risk-factors-among-adolescents-systematic-review-and-meta-analysis
#9
Carla de Magalhães Cunha, Priscila R F Costa, Lucivalda P M de Oliveira, Valterlinda A de O Queiroz, Jacqueline C D Pitangueira, Ana Marlúcia Oliveira
This study systematised and synthesised the results of observational studies that were aimed at supporting the association between dietary patterns and cardiometabolic risk (CMR) factors among adolescents. Relevant scientific articles were searched in PUBMED, EMBASE, SCIENCE DIRECT, LILACS, WEB OF SCIENCE and SCOPUS. Observational studies that included the measurement of any CMR factor in healthy adolescents and dietary patterns were included. The search strategy retained nineteen articles for qualitative analysis...
April 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29644236/hypertrophic-cardiomyopathy-with-a-large-apical-ventricular-aneurysm-and-mural-thrombus
#10
Munis Raza, Nagib Chalfoun, Abdallah Wissam, Hamza Hashmi, Richard McNamara
Hypertrophic cardiomyopathy (HCM) is characterized by increased left ventricular wall thickness in the absence of any other identifiable cause of thickness. It predisposes the patient to increased risk of sudden cardiac death (SCD) due to fatal arrhythmias. Approximately 2% of the HCM patients have left ventricular apical aneurysm. CMR imaging is better in identifying this apical aneurysm as compared to echocardiogram. This apical aneurysm, which can be akinetic or dyskinetic, increases the risk of disease-related adverse events as compared to general HCM...
March 14, 2018: Global Cardiology Science & Practice
https://www.readbyqxmd.com/read/29644231/mechanistic-insights-of-the-left-ventricle-structure-and-fibrosis-in-the-arrhythmogenic-mitral-valve-prolapse
#11
REVIEW
Leticia Fernández-Friera, Rafael Salguero, Luca Vannini, Ana Fidalgo Argüelles, Fernando Arribas, Jorge Solís
Mitral valve prolapse (MVP) is a common and benign condition. However, some anatomic forms have been recently associated with life-threatening ventricular arrhythmias and sudden cardiac death. Imaging MVP holds the promise of individualized MVP risk assessment. Noninvasive imaging techniques available today are playing an increasingly important role in the diagnosis, prognosis and monitoring of MVP. In this article, we will review the current evidence on arrhythmogenic MVP, with special focus on the utility of echocardiography and CMR for identifying benign and "malignant" forms of MVP...
March 14, 2018: Global Cardiology Science & Practice
https://www.readbyqxmd.com/read/29629959/baseline-cerebral-metabolic-rate-is-a-critical-determinant-of-the-cerebral-vasodilating-potency-of-volatile-anesthetic-agents
#12
John C Drummond
Halothane is commonly viewed as a more potent cerebral vasodilator than isoflurane. It was speculated that the lesser vasodilation caused by isoflurane might be the result of the greater reduction in cerebral metabolic rate (CMR) that it causes, and that the relative vasodilating potencies of halothane and isoflurane would be similar if the two agents were administered in a situation that precluded volatile-agent-induced depression of CMR. To test this hypothesis, cerebral blood flow (CBF) and the cerebral metabolic rate for oxygen (CMRO2) were measured in two groups of rabbits before and after the administration of 0...
April 9, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29629254/multimodality-imaging-and-clinical-significance-of-congenital-ventricular-outpouchings-recesses-diverticula-aneurysms-clefts-and-crypts
#13
REVIEW
Alberto Cresti, Pierpaolo Cannarile, Elena Aldi, Marco Solari, Bruno Sposato, Luca Franci, Ugo Limbruno
The high spatial resolution of cardiac computed tomography (CT) and cardiac magnetic resonance (CMR) permit the diagnosis of congenital ventricular outpouchings (CVOs), including congenital ventricular diverticula (CVD), congenital ventricular aneurysms (CVA), clefts, and crypts. A unique classification has not been established, and these terms are used interchangeably with confounding terminology. Moreover, their significance is not univocal. A research was performed using PubMed on six subjects: (1) congenital left ventricular outpouchings; (2) congenital ventricular diverticulum; (3) congenital ventricular aneurysm; (4) ventricular clefts; (5) ventricular crypts; and (6) ventricular crevices...
January 2018: Journal of Cardiovascular Echography
https://www.readbyqxmd.com/read/29629022/impact-of-a-geometric-correction-for-proximal-flow-constraint-on-the-assessment-of-mitral-regurgitation-severity-using-the-proximal-flow-convergence-method
#14
Jeong Yoon Jang, Joon-Won Kang, Dong Hyun Yang, Sahmin Lee, Byung Joo Sun, Dae-Hee Kim, Jong-Min Song, Duk-Hyun Kang, Jae-Kwan Song
Background: Overestimation of the severity of mitral regurgitation (MR) by the proximal isovelocity surface area (PISA) method has been reported. We sought to test whether angle correction (AC) of the constrained flow field is helpful to eliminate overestimation in patients with eccentric MR. Methods: In a total of 33 patients with MR due to prolapse or flail mitral valve, both echocardiography and cardiac magnetic resonance image (CMR) were performed to calculate regurgitant volume (RV)...
March 2018: Journal of Cardiovascular Ultrasound
https://www.readbyqxmd.com/read/29628446/assessment-of-lvef-using-a-new-16-segment-wall-motion-score-in-echocardiography
#15
Real Lebeau, Karim Serri, Maria Di Lorenzo, Claude Sauvé, Van Hoai Viet Le, Vicky Soulières, Malak El-Rayes, Maude Pagé, Chimène Zaïani, Jérôme Garot, Frédéric Poulin
BACKGROUND: Simpson biplane method and 3D by transthoracic echocardiography (TTE), radionuclide angiography (RNA) and cardiac magnetic resonance imaging (CMR) are the most accepted techniques for left ventricular ejection fraction (LVEF) assessment. Wall motion score index (WMSI) by TTE is an accepted complement. However, the conversion from WMSI to LVEF is obtained through a regression equation, which may limit its use. In this retrospective study, we aimed to validate a new method to derive LVEF from the wall motion score in 95 patients...
June 2018: Echo Research and Practice
https://www.readbyqxmd.com/read/29627741/effects-of-renal-sympathetic-denervation-on-myocardial-structure-function-and-perfusion-a-serial-cmr-study
#16
Sinny Delacroix, Ramesh G Chokka, Adam J Nelson, Dennis T Wong, Stephen Pederson, Joanne Nimmo, Adil Rajwani, Kerry Williams, Karen S Teo, Stephen G Worthley
BACKGROUND AND AIMS: Echocardiographic studies have shown improvements in cardiac indices associated with renal sympathetic denervation (RDN), however, the benefits on myocardial perfusion have never been assessed. This trial was designed to study the effects of RDN on myocardial perfusion using cardiac magnetic resonance (CMR) imaging. METHODS: A total of 14 patients with resistant hypertension were recruited for RDN and myocardial perfusion, alongside other CMR indices, was assessed at baseline and at 6 months...
March 10, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29626239/high-spatial-resolution-free-breathing-3d-late-gadolinium-enhancement-cardiac-magnetic-resonance-imaging-in-ischaemic-and-non-ischaemic-cardiomyopathy-quantitative-assessment-of-scar-mass-and-image-quality
#17
Maurice B Bizino, Qian Tao, Jacob Amersfoort, Hans-Marc J Siebelink, Pieter J van den Bogaard, Rob J van der Geest, Hildo J Lamb
PURPOSE: To compare breath-hold (BH) with navigated free-breathing (FB) 3D late gadolinium enhancement cardiac MRI (LGE-CMR) MATERIALS AND METHODS: Fifty-one patients were retrospectively included (34 ischaemic cardiomyopathy, 14 non-ischaemic cardiomyopathy, three discarded). BH and FB 3D phase sensitive inversion recovery sequences were performed at 3T. FB datasets were reformatted into normal resolution (FB-NR, 1.46x1.46x10mm) and high resolution (FB-HR, isotropic 0.91-mm voxels). Scar mass, scar edge sharpness (SES), SNR and CNR were compared using paired-samples t-test, Pearson correlation and Bland-Altman analysis...
April 6, 2018: European Radiology
https://www.readbyqxmd.com/read/29623849/cardiac-imaging-in-systemic-diseases-what-the-clinician-should-know
#18
Cesar J Herrera, Pamela Pina Santana, Jorge Martinez, Mario J Garcia
IMPORTANCE: Systemic diseases that affect the cardiovascular system constitute a diagnostic and therapeutic challenge for all specialists involved; imaging tools along with clinical suspicion play an essential role in their evaluation. These entities share neurological, immunological, renal, hematologic, oncologic, infectious and endocrine processes, all of which may have associated cardiac involvement. OBSERVATIONS: Recent advances in cardiac ultrasound, computed tomography (CT), cardiac magnetic resonance (CMR) and nuclear scintigraphy have impacted the management of these conditions when involving the heart since they provide valuable anatomical and functional information while avoiding the use of invasive techniques...
April 5, 2018: Current Cardiology Reviews
https://www.readbyqxmd.com/read/29622585/prevalence-and-progression-of-late-gadolinium-enhancement-in-children-and-adolescents-with-hypertrophic-cardiomyopathy
#19
Anna Axelsson Raja, Hoshang Farhad, Anne Marie Valente, John-Paul Couce, John Lynn Jefferies, Henning Bundgaard, Kenneth Zahka, Harry Lever, Anne M Murphy, Euan Ashley, Sharlene M Day, Mark V Sherrid, Ling Shi, David A Bluemke, Charles E Canter, Steven D Colan, Carolyn Y Ho
Background -Late gadolinium enhancement (LGE) on cardiac magnetic resonance imaging (CMR) is believed to represent dense replacement fibrosis. It is seen in ~60% of adult patients with hypertrophic cardiomyopathy (HCM). However, the prevalence of LGE in children and adolescents with HCM is not well established. Additionally, longitudinal studies describing the development and evolution of LGE in pediatric HCM are lacking. This study assesses the prevalence, progression, and clinical correlations of LGE in children and adolescents with, or genetically predisposed to, HCM...
April 5, 2018: Circulation
https://www.readbyqxmd.com/read/29615750/impact-of-systemic-volume-status-on-cardiac-magnetic-resonance-t1-mapping
#20
Marlies Antlanger, Stefan Aschauer, Andreas A Kammerlander, Franz Duca, Marcus D Säemann, Diana Bonderman, Julia Mascherbauer
Diffuse myocardial fibrosis is a key pathophysiologic feature in heart failure and can be quantified by cardiac magnetic resonance (CMR) T1 mapping. However, increases in myocardial free water also prolong native T1 times and may impact fibrosis quantification. Thus far, the impact of systemic patient volume status remains unclear. In this study, native T1 time by CMR was investigated in hemodialysis (HD) patients (n = 37) and compared with healthy controls (n = 35). Volume status was quantified by bioimpedance spectroscopy and correlated with CMR T1 time...
April 3, 2018: Scientific Reports
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