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https://www.readbyqxmd.com/read/28924076/third-and-fourth-heart-sounds-and-myocardial-fibrosis-in-hypertrophic-cardiomyopathy
#1
Yoshimi Sato, Tatsuya Kawasaki, Sakiko Honda, Kuniyasu Harimoto, Shigeyuki Miki, Tadaaki Kamitani, Hirokazu Shiraishi, Satoaki Matoba
BACKGROUND: The 4th heart sound (S4) is commonly heard in patients with hypertrophic cardiomyopathy (HCM). The 3rd heart sound (S3) is also audible in HCM patients regardless of the presence or absence of heart failure. These extra heart sounds may be associated with myocardial fibrosis because myocardial fibrosis has been suggested to affect left ventricular compliance.Methods and Results:The present retrospective study evaluated 53 consecutive HCM patients with sinus rhythm who had no symptoms of heart failure and underwent an initial assessment including phonocardiography, echocardiography, and late gadolinium enhancement (LGE) magnetic resonance imaging (MRI)...
September 16, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28922831/the-transcription-factors-coup-tfi-and-coup-tfii-have-distinct-roles-in-arealisation-and-gabaergic-interneuron-specification-in-the-early-human-fetal-telencephalon
#2
Ayman Alzu'bi, Susan J Lindsay, Lauren F Harkin, Jack McIntyre, Steven N Lisgo, Gavin J Clowry
In human telencephalon at 8-12 postconceptional weeks, ribonucleic acid quantitative sequencing and immunohistochemistry revealed cortical chicken ovalbumin upstream promotor-transcription factor 1 (COUP-TFI) expression in a high ventro-posterior to low anterior gradient except for raised immunoreactivity in the anterior ventral pallium. Unlike in mouse, COUP-TFI and SP8 were extensively co-expressed in dorsal sensory neocortex and dorsal hippocampus whereas COUPTFI/COUPTFII co-expression defined ventral temporal cortex and ventral hippocampus...
October 1, 2017: Cerebral Cortex
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/28903760/feasibility-of-detecting-myocardial-infarction-in-the-sheep-fetus-using-late-gadolinium-enhancement-cmr-imaging
#5
An Qi Duan, Mitchell C Lock, Sunthara Rajan Perumal, Jack R Darby, Jia Yin Soo, Joseph B Selvanayagam, Christopher K Macgowan, Mike Seed, Janna L Morrison
BACKGROUND: Late gadolinium enhancement (LGE) cardiovascular magnetic resonance (CMR) imaging has enabled the accurate assessment of myocardial infarction (MI). However, LGE CMR has not been performed successfully in the fetus, where it could be useful for animal studies of interventions to promote cardiac regeneration. We believe that LGE imaging could allow us to document the presence, extent and effect of MI in utero and would thereby expand our capacity for conducting fetal sheep MI research...
September 13, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28884216/standardized-unfold-mapping-a-technique-to-permit-left-atrial-regional-data-display-and-analysis
#6
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/28882227/left-atrial-fibrosis-and-risk-of-cerebrovascular-and-cardiovascular-events-in-patients-with%C3%A2-atrial-fibrillation
#7
MULTICENTER STUDY
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/28867022/cardiac-magnetic-resonance-evaluation-of-left-ventricular-functional-morphological-and-structural-features-in-children-and-adolescents-vs-young-adults-with-isolated-left-ventricular-non-compaction
#8
Gaetano Nucifora, Karthigesh Sree Raman, Daniele Muser, Ranjit Shah, Rebecca Perry, Kama A Awang Ramli, Joseph B Selvanayagam
AIM: To investigate the left ventricular (LV) functional, morphological, and structural features revealed by cardiac magnetic resonance (CMR) in children/adolescents with isolated LV non-compaction (iLVNC), and to compare them with those observed in young adults with iLVNC and healthy controls. METHODS: 56 subjects were included: 12 children/adolescents (mean age 15±3years, 75% male) and 20 young adults (mean age 35±7years, 75% male) with first diagnosis of iLVNC, 12 healthy children/adolescents (mean age 15±3years, 75% male) and 12 healthy young adults (mean age 34±8years, 75% male)...
November 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28856412/accurate-late-gadolinium-enhancement-prediction-by-early-t1-based-quantitative-synthetic-mapping
#9
Randy van Dijk, Dirkjan Kuijpers, Theodorus A M Kaandorp, Paul R M van Dijkman, Rozemarijn Vliegenthart, Pim van der Harst, Matthijs Oudkerk
OBJECTIVES: Early synthetic gadolinium enhancement (ESGE) imaging from post-contrast T1 mapping after adenosine stress-perfusion cardiac magnetic resonance (CMR) was compared to conventional late gadolinium enhancement (LGE) imaging for assessing myocardial scar. METHODS: Two hundred fourteen consecutive patients suspected of myocardial ischaemia were referred for stress-perfusion CMR. Myocardial infarct volume was quantified on a per-subsegment basis in both synthetic (2-3 min post-gadolinium) and conventional (9 min post-gadolinium) images by two independent observers...
August 30, 2017: European Radiology
https://www.readbyqxmd.com/read/28855658/the-diagnostic-value-of-global-longitudinal-strain-gls-on-myocardial-infarction-size-by-echocardiography-a-systematic-review-and-meta-analysis
#10
Kai-Yue Diao, Zhi-Gang Yang, Min Ma, Yong He, Qin Zhao, Xi Liu, Yue Gao, Lin-Jun Xie, Ying-Kun Guo
A systematic review and meta-analysis of prospective randomized studies were performed to evaluate the diagnostic value of measuring global longitudinal strain (GLS) using speckle tracking echocardiography (STE) in determining myocardial infarction (MI) size, which is usually measured based on late gadolinium enhancement (LGE) by cardiovascular magnetic resonance (CMR). Eleven trials with a total of 765 patients were included. The pooled correlation was 0.70 (95% CI: 0.64, 0.74) between two-dimensional (2D) GLS and the LGE percentage, and it was 0...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28855115/catheter-ablation-versus-medical-rate-control-in-atrial-fibrillation-and-systolic-dysfunction-camera-mri
#11
Sandeep Prabhu, Andrew J Taylor, Ben T Costello, David M Kaye, Alex Aj McLellan, Aleksandr Voskoboinik, Hariharan Sugumar, Siobhan M Lockwood, Michael B Stokes, Bhupesh Pathik, Chrishan J Nalliah, Geoff R Wong, Sonia M Azzopardi, Sarah Gutman, Geoffrey Lee, Jamie Layland, Justin A Mariani, Liang-Han Ling, Jonathan M Kalman, Peter M Kistler
BACKGROUND: Atrial fibrillation (AF) and left ventricular systolic dysfunction (LVSD) frequently co-exist despite adequate rate-control. Existing randomized studies of AF and LVSD of varying etiologies have demonstrated modest benefits with a rhythm control strategy. OBJECTIVE: To determine whether catheter ablation (CA) for AF could improve LVSD compared to medical rate-control (MRC) where the etiology of the LVSD was unexplained, apart from the presence of AF...
August 22, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28840397/right-ventricular-involvement-evaluated-by-cardiac-magnetic-resonance-imaging-predicts-mortality-in-patients-with-light-chain-amyloidosis
#12
Ke Wan, Jiayu Sun, Yuchi Han, Yong Luo, Hong Liu, Dan Yang, Wei Cheng, Qing Zhang, Zhi Zeng, Yucheng Chen
Few studies have focused on right ventricular (RV) involvement in cardiac amyloidosis (CA). We investigated the prognostic value of RV assessment by cardiovascular magnetic resonance (CMR) in CA. In 2011-2014, consecutive patients with suspected CA referred for CMR were retrospectively evaluated. Demographic and baseline clinical characteristics were collected. Healthy volunteers were matched for sex and age and served as controls. All subjects underwent a contrast-enhanced CMR examination. RV size, function, and late gadolinium enhancement (LGE) were analyzed...
August 24, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28838961/cardiovascular-magnetic-resonance-to-predict-appropriate-implantable-cardioverter-defibrillator-therapy-in-ischemic-and-nonischemic-cardiomyopathy-patients-using-late-gadolinium-enhancement-border-zone-comparison-of-four-analysis-methods
#13
COMPARATIVE STUDY
Robert Jablonowski, Uzma Chaudhry, Jesper van der Pals, Henrik Engblom, Håkan Arheden, Einar Heiberg, Katherine C Wu, Rasmus Borgquist, Marcus Carlsson
BACKGROUND: Late gadolinium enhancement (LGE) border zone on cardiac magnetic resonance imaging has been proposed as an independent predictor of ventricular arrhythmias. The purpose was to determine whether size and heterogeneity of LGE predict appropriate implantable cardioverter defibrillator (ICD) therapy in ischemic cardiomyopathy (ICM) and nonischemic cardiomyopathy (NICM) patients and to evaluate 4 LGE border-zone algorithms. METHODS AND RESULTS: ICM and NICM patients who underwent LGE cardiac magnetic resonance imaging prior to ICD implantation were retrospectively included...
September 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28836886/subacute-and-chronic-left-ventricular-myocardial-scar-accuracy-of-texture-analysis-on-nonenhanced-cine-mr-images
#14
Bettina Baessler, Manoj Mannil, Sabrina Oebel, David Maintz, Hatem Alkadhi, Robert Manka
Purpose To test whether texture analysis (TA) allows for the diagnosis of subacute and chronic myocardial infarction (MI) on noncontrast material-enhanced cine cardiac magnetic resonance (MR) images. Materials and Methods In this retrospective, institutional review board-approved study, 120 patients who underwent cardiac MR imaging and showed large transmural (volume of enhancement on late gadolinium enhancement [LGE] images >20%, n = 72) or small (enhanced volume ≤20%, n = 48) subacute or chronic ischemic scars were included...
August 23, 2017: Radiology
https://www.readbyqxmd.com/read/28835250/dark-blood-late-gadolinium-enhancement-without-additional-magnetization-preparation
#15
Robert J Holtackers, Amedeo Chiribiri, Torben Schneider, David M Higgins, René M Botnar
BACKGROUND: This study evaluates a novel dark-blood late gadolinium enhancement (LGE) cardiovascular magnetic resonance imaging (CMR) method, without using additional magnetization preparation, and compares it to conventional bright-blood LGE, for the detection of ischaemic myocardial scar. LGE is able to clearly depict myocardial infarction and macroscopic scarring from viable myocardium. However, due to the bright signal of adjacent left ventricular blood, the apparent volume of scar tissue can be significantly reduced, or even completely obscured...
August 23, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28826849/thoracic-epidural-anesthesia-reversed-myocardial-fibrosis-in-patients-with-heart-failure-caused-by-dilated-cardiomyopathy
#16
Dan Ma, Lei Liu, Hongwei Zhao, Ruiying Zhang, Fengxiang Yun, Lulu Li, Yang Wang, Renhai Qu, Pengfei Liu, Fengqi Liu
OBJECTIVE: To verify that high thoracic epidural anesthesia (TEA) could reverse myocardial fibrosis in heart failure caused by dilated cardiomyopathy (DCM). DESIGN: Hospitalized patients with DCM and heart failure. SETTING: Harbin Medical University, Harbin, Heilongjiang, China. PARTICIPANTS: Eight patients. INTERVENTIONS: 0.5% lidocaine was administered epidurally at the T4-T5 interspace for 4 weeks...
May 4, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28821947/the-influence-of-microvascular-injury-on-native-t1-and-t2-relaxation-values-after-acute-myocardial-infarction-implications-for-non-contrast-enhanced-infarct-assessment
#17
Lourens F H J Robbers, Robin Nijveldt, Aernout M Beek, Paul F A Teunissen, Maurits R Hollander, P Stefan Biesbroek, Henk Everaars, Peter M van de Ven, Mark B M Hofman, Niels van Royen, Albert C van Rossum
OBJECTIVES: Native T1 mapping and late gadolinium enhancement (LGE) imaging offer detailed characterisation of the myocardium after acute myocardial infarction (AMI). We evaluated the effects of microvascular injury (MVI) and intramyocardial haemorrhage on local T1 and T2* values in patients with a reperfused AMI. METHODS: Forty-three patients after reperfused AMI underwent cardiovascular magnetic resonance imaging (CMR) at 4 [3-5] days, including native MOLLI T1 and T2* mapping, STIR, cine imaging and LGE...
August 18, 2017: European Radiology
https://www.readbyqxmd.com/read/28821300/t1-refblochi-high-resolution-3d-post-contrast-t1-myocardial-mapping-based-on-a-single-3d-late-gadolinium-enhancement-volume-bloch-equations-and-a-reference-t1
#18
Chenxi Hu, Albert J Sinusas, Steffen Huber, Stephanie Thorn, Mitchel R Stacy, Hamid Mojibian, Dana C Peters
BACKGROUND: High resolution 3D T1 mapping is important for assessment of diffuse myocardial fibrosis in left atrium or other thin-walled structures. In this work, we investigated a fast single-TI 3D high resolution T1 mapping method that directly transforms a 3D late gadolinium enhancement (LGE) volume to a 3D T1 map. METHODS: The proposed method, T1-refBlochi, is based on Bloch equation modeling of the LGE signal, a single-point calibration, and assumptions that proton density and T2* are relatively uniform in the heart...
August 18, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28814342/septal-contributions-to-olfactory-bulb-interneuron-diversity-in-the-embryonic-mouse-telencephalon-role-of-the-homeobox-gene-gsx2
#19
Shenyue Qin, Stephanie M Ware, Ronald R Waclaw, Kenneth Campbell
BACKGROUND: Olfactory bulb (OB) interneurons are known to represent diverse neuronal subtypes, which are thought to originate from a number of telencephalic regions including the embryonic dorsal lateral ganglionic eminence (dLGE) and septum. These cells migrate rostrally toward the OB, where they then radially migrate to populate different OB layers including the granule cell layer (GCL) and the outer glomerular layer (GL). Although previous studies have attempted to investigate regional contributions to OB interneuron diversity, few genetic tools have been used to address this question at embryonic time points when the earliest populations are specified...
August 16, 2017: Neural Development
https://www.readbyqxmd.com/read/28813699/t1-and-t2-mapping-in-cardiology-mapping-the-obscure-object-of-desire
#20
Sophie Mavrogeni, Dimitris Apostolou, Panayiotis Argyriou, Stella Velitsista, Lilika Papa, Stelios Efentakis, Evangelos Vernardos, Mikela Kanoupaki, George Kanoupakis, Athanassios Manginas
The increasing use of cardiovascular magnetic resonance (CMR) is based on its capability to perform biventricular function assessment and tissue characterization without radiation and with high reproducibility. The use of late gadolinium enhancement (LGE) gave the potential of non-invasive biopsy for fibrosis quantification. However, LGE is unable to detect diffuse myocardial disease. Native T1 mapping and extracellular volume fraction (ECV) provide knowledge about pathologies affecting both the myocardium and interstitium that is otherwise difficult to identify...
August 17, 2017: Cardiology
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