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https://www.readbyqxmd.com/read/29778854/proposed-stages-of-myocardial-phenotype-development-in-fabry-disease
#1
Sabrina Nordin, Rebecca Kozor, Katia Medina-Menacho, Amna Abdel-Gadir, Shanat Baig, Daniel M Sado, Ilaria Lobascio, Elaine Murphy, Robin H Lachmann, Atul Mehta, Nicola C Edwards, Uma Ramaswami, Richard P Steeds, Derralynn Hughes, James C Moon
OBJECTIVES: The authors sought to explore the Fabry myocardium in relation to storage, age, sex, structure, function, electrocardiogram changes, blood biomarkers, and inflammation/fibrosis. BACKGROUND: Fabry disease (FD) is a rare, x-linked lysosomal storage disorder. Mortality is mainly cardiovascular with men exhibiting cardiac symptoms earlier than women. By cardiovascular magnetic resonance, native T1 is low in FD because of sphingolipid accumulation. METHODS: A prospective, observational study of 182 FD (167 adults, 15 children; mean age 42 ± 17 years, 37% male) who underwent cardiovascular magnetic resonance including native T1, late gadolinium enhancement (LGE), and extracellular volume fraction, 12-lead electrocardiogram, and blood biomarkers (troponin and N-terminal pro-brain natriuretic peptide)...
May 11, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29777548/higher-contact-force-during-radiofrequency-ablation-leads-to-a-much-larger-increase-in-edema-as-compared-to-chronic-lesion-size
#2
Samuel Thomas, Josh Silvernagel, Nathan Angel, Eugene Kholmovski, Elyar Ghafoori, Nan Hu, John Ashton, Derek J Dosdall, Rob MacLeod, Ravi Ranjan
INTRODUCTION: Reversible edema is a part of any radiofrequency ablation but its relationship with contact force is unknown. The goal of this study was to characterize through histology and MRI, acute and chronic ablation lesions and reversible edema with contact force. METHODS AND RESULTS: In a canine model (n = 14), chronic ventricular lesions were created with a 3.5 mm tip ThermoCool SmartTouch (Biosense Webster) catheter at 25W or 40W for 30 sec. Repeat ablation was performed after 3 months to create a second set of lesions (acute)...
May 18, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29759774/assessment-of-left-atrial-fibrosis-by-late-gadolinium-enhancement-magnetic-resonance-imaging-methodology-and-clinical-implications
#3
REVIEW
Johannes Siebermair, Eugene G Kholmovski, Nassir Marrouche
Recently, studies using late gadolinium enhancement (LGE) magnetic resonance imaging (MRI) to identify structural changes of atrial tissue have contributed significantly to understanding the pathophysiology and progression of atrial fibrillation (AF). Moreover, imaging of atrial fibrosis using MRI has evolved to be a tool to improve clinical outcome of AF ablation procedures by allowing a patient-specific individualized management approach. LGE-MRI has been shown to predict AF ablation outcome based on pre-procedural imaging to define the extent of atrial fibrosis...
August 2017: JACC. Clinical Electrophysiology
https://www.readbyqxmd.com/read/29754161/motion-corrected-whole-heart-pet-mr-for-the-simultaneous-visualisation-of-coronary-artery-integrity-and-myocardial-viability-an-initial-clinical-validation
#4
Camila Munoz, Karl P Kunze, Radhouene Neji, Teresa Vitadello, Christoph Rischpler, René M Botnar, Stephan G Nekolla, Claudia Prieto
PURPOSE: Cardiac PET-MR has shown potential for the comprehensive assessment of coronary heart disease. However, image degradation due to physiological motion remains a challenge that could hinder the adoption of this technology in clinical practice. The purpose of this study was to validate a recently proposed respiratory motion-corrected PET-MR framework for the simultaneous visualisation of myocardial viability (18 F-FDG PET) and coronary artery anatomy (coronary MR angiography, CMRA) in patients with chronic total occlusion (CTO)...
May 12, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29747127/wideband-lge-mri-permits-unobstructed-viewing-of-myocardial-scarring-in-a-patient-with-an-mr-conditional-subcutaneous-implantable-cardioverter-defibrillator
#5
Amir Ali Rahsepar, Jeremy D Collins, Bradley P Knight, KyungPyo Hong, James C Carr, Daniel Kim
A subcutaneous implantable cardioverter-defibrillator (S-ICD) is an alternative device for prevention of sudden cardiac death, without any leads within the heart. Patients implanted with any type of ICD may need catheter ablation of ventricular tachycardia (VT) to reduce the overall arrhythmia burden (e.g., recurrent monomorphic VT) and lower the incidence of painful shocks induced by the device. Late gadolinium enhancement (LGE) MRI is a useful pre-test for guiding VT ablation, because it can be used to map myocardial scar and produce better outcomes...
May 4, 2018: Clinical Imaging
https://www.readbyqxmd.com/read/29743511/detection-of-recent-myocardial-infarction-using-native-t1-mapping-in-a-swine-model-a-validation-study
#6
Chen Cui, Shuli Wang, Minjie Lu, Xuejing Duan, Hongyue Wang, Liujun Jia, Yue Tang, Arlene Sirajuddin, Sanjay K Prasad, Peter Kellman, Andrew E Arai, Shihua Zhao
Late gadolinium enhancement (LGE) imaging is the currently the gold standard for in-vivo detection of myocardial infarction. However, gadolinium contrast administration is contraindicated in patients with renal insufficiency. We aim to evaluate the diagnostic sensitivity and specificity of this contrast-free MRI technique, native T1 mapping, in detecting recent myocardial infarction versus a reference histological gold standard. Ten pigs underwent CMR at 2 weeks after induced MI. The infarct size and transmural extent of MI was calculated using native T1 maps and LGE images...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29737871/circulating-biomarkers-of-hypertrophy-and-fibrosis-in-patients-with-hypertrophic-cardiomyopathy-assessed-by-cardiac-magnetic-resonance
#7
Monika Gawor, Mateusz Śpiewak, Agata Kubik, Aleksandra Wróbel, Anna Lutyńska, Magdalena Marczak, Jacek Grzybowski
PURPOSE: Myocardial fibrosis in hypertrophic cardiomyopathy (HCM) is associated with worse clinical outcomes. The availability of circulating biomarkers of myocardial fibrosis and hypertrophy would be helpful in clinical practice. METHODS: Levels of biomarkers: soluble ST2 (sST2), galectin-3, growth differentiation factor-15 (GDF-15), NT-proBNP, and high-sensitivity cardiac troponin T (hs-cTnT) were measured in 60 patients with HCM. All patients underwent cardiac magnetic resonance imaging to calculate parameters of hypertrophy and fibrosis...
May 8, 2018: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/29735362/mri-with-gadofosveset-a-potential-marker-for-permeability-in-myocardial-infarction
#8
Begoña Lavin, Andrea Protti, Silvia Lorrio, Xuebin Dong, Alkystis Phinikaridou, René M Botnar, Ajay Shah
BACKGROUND AND AIMS: Acute ischemia is associated with myocardial endothelial damage and microvessel formation, resulting in leakage of plasma albumin into the myocardial extravascular space. In this study, we tested whether an albumin-binding intravascular contrast agent (gadofosveset) allows for improved quantification of myocardial permeability compared to the conventional extracellular contrast agent Gd-DTPA using late gadolinium enhancement (LGE) and T1 mapping in vivo. METHODS: MI was induced in C57BL/6 mice (n = 6) and cardiac magnetic resonance imaging (CMR) was performed at 3, 10 and 21 days post-MI using Gd-DTPA and 24 h later using gadofosveset...
April 25, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29734489/diagnostic-performance-of-intravoxel-incoherent-motion-diffusion-weighted-imaging-in-the-assessment-of-the-dynamic-status-of-myocardial-perfusion
#9
Dong-Aolei An, Bing-Hua Chen, Rui-Wu, Ruo-Yang Shi, Jun Bu, Heng Ge, Jiani Hu, Jian-Rong Xu, Lian-Ming Wu
BACKGROUND: Acute myocardial infarction (AMI) is a major cause of morbidity and mortality worldwide and places a significant financial burden on our society. PURPOSE: To determine the feasibility of cardiac intravoxel incoherent motion (IVIM) in the consecutive evaluation of myocardial perfusion in myocardial infarction patients postpercutaneous coronary intervention (PCI) and to investigate the dynamic biological phenomena in myocardial perfusion after AMI. STUDY TYPE: Prospective observational study...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29731119/relation-of-left-atrial-appendage-remodeling-by-magnetic-resonance-imaging-and-outcome-of-ablation-for-atrial-fibrillation
#10
Promporn Suksaranjit, Nassir F Marrouche, Frederick T Han, Alan Morris, Gagandeep Kaur, Tyson Oswald, Brent D Wilson
The left atrial appendage (LAA) is a nonpulmonary vein trigger site in atrial fibrillation (AF). The association of LAA structural remodeling (SRM) identified by late gadolinium enhancement magnetic resonance imaging (LGE-MRI) and AF ablation outcome has never been described. This study sought to investigate the clinical significance of LAA-SRM in AF patients who undergo ablation therapy. Consecutive patients with AF who underwent catheter ablation therapy within 14 days following MRI scan were included in this study...
March 29, 2018: American Journal of Cardiology
https://www.readbyqxmd.com/read/29728953/electrocardiography-based-prediction-of-hypertrophy-pattern-and-fibrosis-amount-in-hypertrophic-cardiomyopathy-comparative-study-with-cardiac-magnetic-resonance-imaging
#11
Chul Hwan Park, Hyemoon Chung, Yoonjung Kim, Jong-Youn Kim, Pil-Ki Min, Kyung-A Lee, Young Won Yoon, Tae Hoon Kim, Byoung Kwon Lee, Bum-Kee Hong, Se-Joong Rim, Hyuck Moon Kwon, Eui-Young Choi
Although, cardiac magnetic resonance imaging (CMR) is a gold standard for risk stratification of hypertrophic cardiomyopathy (HCM), is limited in some situations. We sought to evaluate the predictive power of quantitative electrocardiography in assessing hypertrophy pattern and fibrosis in HCM. Eighty-eight patients with HCM were studied. Voltage of R-S-T waves, number of fragmented QRS (fQRS) complexes, and T wave morphology were measured by 12-lead electrocardiography. Sixteen segmental thickness, late gadolinium enhancement (LGE), native T1, extracellular volume fraction (ECV), and T2, left ventricular (LV) mass and %LGE were measured by CMR...
May 4, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29728952/myocardial-perfusion-reserve-and-global-longitudinal-strain-as-potential-markers-of-coronary-allograft-vasculopathy-in-late-stage-orthotopic-heart-transplantation
#12
Akhil Narang, John E Blair, Mita B Patel, Victor Mor-Avi, Savitri E Fedson, Nir Uriel, Roberto M Lang, Amit R Patel
Coronary allograft vasculopathy (CAV) is a major cause of mortality in late-stage orthotopic heart transplantation (OHT) patients. Recent evidence has shown that myocardial perfusion reserve (MPR) derived from vasodilator cardiovascular magnetic resonance imaging (vCMR) and global longitudinal strain (GLS) from transthoracic echocardiography (TTE) are useful to detect CAV. However, previous studies have not comprehensively addressed whether these parameters are confounded by allograft rejection, myocardial scar/fibrosis, or allograft dysfunction...
May 4, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29728817/lge-cmr-derived-texture-features-reflect-poor-prognosis-in-hypertrophic-cardiomyopathy-patients-with-systolic-dysfunction-preliminary-results
#13
Sainan Cheng, Mengjie Fang, Chen Cui, Xiuyu Chen, Gang Yin, Sanjay K Prasad, Di Dong, Jie Tian, Shihua Zhao
OBJECTIVES: To evaluate the prognostic value of texture features based on late gadolinium enhancement cardiac magnetic resonance (LGE-CMR) images in hypertrophic cardiomyopathy (HCM) patients with systolic dysfunction. METHODS: 67 HCM patients with systolic dysfunction (41 male and 26 female, mean age ± standard deviation, 46.20 years ± 13.38) were enrolled. All patients underwent 1.5 T CMR cine and LGE imaging. Texture features were extracted from LGE images...
May 4, 2018: European Radiology
https://www.readbyqxmd.com/read/29725307/comparing-reentrant-drivers-predicted-by-image-based-computational-modeling-and-mapped-by-electrocardiographic-imaging-in-persistent-atrial-fibrillation
#14
Patrick M Boyle, Joe B Hakim, Sohail Zahid, William H Franceschi, Michael J Murphy, Edward J Vigmond, Rémi Dubois, Michel Haïssaguerre, Mélèze Hocini, Pierre Jaïs, Natalia A Trayanova, Hubert Cochet
Electrocardiographic mapping (ECGI) detects reentrant drivers (RDs) that perpetuate arrhythmia in persistent AF (PsAF). Patient-specific computational models derived from late gadolinium-enhanced magnetic resonance imaging (LGE-MRI) identify all latent sites in the fibrotic substrate that could potentially sustain RDs, not just those manifested during mapped AF. The objective of this study was to compare RDs from simulations and ECGI (RDsim /RDECGI ) and analyze implications for ablation. We considered 12 PsAF patients who underwent RDECGI ablation...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29722466/post-procedural-lge-cmr-comparison-of-laser-and-radiofrequency-ablation-lesions-after-pulmonary-vein-isolation
#15
Rosa M Figueras I Ventura, Andrei D Mǎrgulescu, Eva M Benito, Francisco Alarcón, Norihiro Enomoto, Susanna Prat-Gonzalez, Rosario J Perea, Roger Borràs, Fredy Chipa, Elena Arbelo, Jose M Tolosana, Josep Brugada, Antonio Berruezo, Lluis Mont
INTRODUCTION: The purpose of this study was to compare the anatomical characteristics of scar formation achieved by visual guided laser balloon (Laser) and radiofrequency (RF) pulmonary vein isolation (PVI), using late-gadolinium-enhanced cardiac magnetic resonance imaging (LGE-CMR). METHODS AND RESULTS: We included 17 patients with paroxysmal or early persistent drug resistant AF who underwent Laser ablation; 2 were excluded due to procedure-related complications...
May 3, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29720202/optimization-of-late-gadolinium-enhancement-cardiovascular-magnetic-resonance-imaging-of-post-ablation-atrial-scar-a-cross-over-study
#16
Henry Chubb, Shadman Aziz, Rashed Karim, Christian Sohns, Orod Razeghi, Steven E Williams, John Whitaker, James Harrison, Amedeo Chiribiri, Tobias Schaeffter, Matthew Wright, Mark O'Neill, Reza Razavi
BACKGROUND: Cardiovascular magnetic resonance (CMR) imaging may be used to visualize post-ablation atrial scar (PAAS), and three-dimensional late gadolinium enhancement (3D LGE) is the most widely employed technique for imaging of chronic scar. Detection of PAAS provides a unique non-invasive insight into the effects of the ablation and may help guide further ablation procedures. However, there is evidence that PAAS is often not detected by CMR, implying a significant sensitivity problem, and imaging parameters vary between leading centres...
May 3, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29708212/myocardial-tissue-characterization-by-combining-late-gadolinium-enhancement-imaging-and-percent-edema-mapping-a-novel-t2-map-based-mri-method-in-canine-myocardial-infarction
#17
Pal Suranyi, Gabriel A Elgavish, U Joseph Schoepf, Balazs Ruzsics, Pal Kiss, Marly van Assen, Brian E Jacobs, Brigitta C Brott, Ada Elgavish, Akos Varga-Szemes
Background: Assessing the extent of ischemic and reperfusion-associated myocardial injuries remains challenging with current magnetic resonance imaging (MRI) techniques. Our aim was to develop a tissue characterization mapping (TCM) technique by combining late gadolinium enhancement (LGE) with our novel percent edema mapping (PEM) approach to enable the classification of tissue represented by MRI voxels as healthy, myocardial edema (ME), necrosis, myocardial hemorrhage (MH), or scar. Methods: Six dogs underwent closed-chest myocardial infarct (MI) generation...
2018: European radiology experimental
https://www.readbyqxmd.com/read/29706134/additive-value-of-3t-cardiovascular-magnetic-resonance-coronary-angiography-for-detecting-coronary-artery-disease
#18
Lijun Zhang, Xiantao Song, Li Dong, Jianan Li, Ruiyu Dou, Zhanming Fan, Jing An, Debiao Li
BACKGROUND: The purpose of the work was to evaluate the incremental diagnostic value of free-breathing, contrast-enhanced, whole-heart, 3 T cardiovascular magnetic resonance coronary angiography (CE-MRCA) to stress/rest myocardial perfusion imaging (MPI) and late gadolinium enhancement (LGE) imaging for detecting coronary artery disease (CAD). METHODS: Fifty-one patients with suspected CAD underwent a comprehensive cardiovascular magnetic resonance (CMR) examination (CE-MRCA, MPI, and LGE)...
April 30, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29685546/texture-analysis-and-machine-learning-of-non-contrast-t1-weighted-mr-images-in-patients-with-hypertrophic-cardiomyopathy-preliminary-results
#19
Bettina Baeßler, Manoj Mannil, David Maintz, Hatem Alkadhi, Robert Manka
PURPOSE: To test in a first proof-of-concept study whether texture analysis (TA) allows for the detection of myocardial tissue alterations in hypertrophic cardiomyopathy (HCM) on non-contrast T1-weighted cardiac magnetic resonance (CMR) images using machine learning based approaches. METHODS: This retrospective, IRB-approved study included 32 patients with known HCM. Thirty patients with normal CMR served as controls. Regions-of-interest for TA encompassing the left ventricle were drawn on short-axis non-contrast T1-weighted images using a freely available software package...
May 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29680356/influence-of-myocardial-hemorrhage-on-staging-of-reperfused-myocardial-infarctions-with-t-2-cardiac-magnetic-resonance-imaging-insights-into-the-dependence-on-infarction-type-with-ex-vivo-validation
#20
Guan Wang, Hsin-Jung Yang, Avinash Kali, Ivan Cokic, Richard Tang, Guoxi Xie, Qi Yang, Joseph Francis, Songbai Li, Rohan Dharmakumar
OBJECTIVES: This study sought to determine whether T2 cardiac magnetic resonance (CMR) can stage both hemorrhagic and nonhemorrhagic myocardial infarctions (MIs). BACKGROUND: CMR-based staging of MI with or without contrast agents relies on the resolution of T2 elevations in the chronic phase, but whether this approach can be used to stage both hemorrhagic and nonhemorrhagic MIs is unclear. METHODS: Hemorrhagic (n = 15) and nonhemorrhagic (n = 9) MIs were created in dogs...
April 14, 2018: JACC. Cardiovascular Imaging
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