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Cardiac MRI

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https://www.readbyqxmd.com/read/29475200/cardiovascular-associations-with-abnormal-brain-magnetic-resonance-imaging-in-neonates-with-hypoxic-ischemic-encephalopathy-undergoing-therapeutic-hypothermia-and-rewarming
#1
Kiran S More, Pankaj Sakhuja, Regan E Giesinger, Joseph Y Ting, Matthew Keyzers, Jesal N Sheth, Anie Lapointe, Amish Jain, Aideen M Moore, Steven P Miller, Patrick J McNamara
OBJECTIVE:  This article compares hemodynamic characteristics of neonates with hypoxic ischemic encephalopathy (HIE) receiving therapeutic hypothermia (TH) with normal versus abnormal brain magnetic resonance imaging (MRI). METHODS:  Serial echocardiography (echo) was performed within 24 hours, after 48 to 72 hours of cooling, within 24 hours of normothermia, and after starting feeds. Pulmonary hemodynamics, cardiac output, and ventricular function were evaluated...
February 23, 2018: American Journal of Perinatology
https://www.readbyqxmd.com/read/29474878/long-term-effects-of-brief-hypoxia-due-to-cardiac-arrest-hippocampal-reductions-and-memory-deficits
#2
Vess Stamenova, Raneen Nicola, Judith Aharon-Peretz, Dorith Goldsher, Michael Kapeliovich, Asaf Gilboa
OBJECTIVE: To examine the effects of brief hypoxia (<7 min) due to cardiac arrest on the integrity of the brain and performance on memory and executive functions tasks. METHODS: Acute myocardial infarction (MI) patients after out-of-hospital cardiac arrest (CA) (n = 9), who were deemed neurologically intact on discharge, were compared to matched patients with MI (n = 9). A battery of clinical and experimental memory and executive functions neuropsychological tests were administered and MRI scans for all patients were collected...
February 20, 2018: Resuscitation
https://www.readbyqxmd.com/read/29472302/quantification-of-intracranial-aneurysm-volume-pulsation-with-7t-mri
#3
R Kleinloog, J J M Zwanenburg, B Schermers, E Krikken, Y M Ruigrok, P R Luijten, F Visser, L Regli, G J E Rinkel, B H Verweij
BACKGROUND AND PURPOSE: Aneurysm volume pulsation is a potential predictor of intracranial aneurysm rupture. We evaluated whether 7T MR imaging can quantify aneurysm volume pulsation. MATERIALS AND METHODS: In Stage I of the study, 10 unruptured aneurysms in 9 patients were studied using a high-resolution (0.6-mm, isotropic) 3D gradient-echo sequence with cardiac gating. Semiautomatic segmentation was used to measure aneurysm volume (in cubic millimeters) per cardiac phase...
February 22, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29472089/investigation-of-the-xcat-phantom-as-a-validation-tool-in-cardiac-mri-tracking-algorithms
#4
Nicholas Lowther, Svenja Ipsen, Steven Marsh, Oliver Blanck, Paul Keall
PURPOSE: To describe our magnetic resonance imaging (MRI) simulated implementation of the 4D digital extended cardio torso (XCAT) phantom to validate our previously developed cardiac tracking techniques. Real-time tracking will play an important role in the non-invasive treatment of atrial fibrillation with MRI-guided radiosurgery. In addition, to show how quantifiable measures of tracking accuracy and patient-specific physiology could influence MRI tracking algorithm design. METHODS: Twenty virtual patients were subjected to simulated MRI scans that closely model the proposed real-world scenario to allow verification of the tracking technique's algorithm...
January 2018: Physica Medica: PM
https://www.readbyqxmd.com/read/29471444/relation-of-sex-hormone-levels-with-prevalent-and-10-year-change-in-aortic-distensibility-assessed-by-mri-the-multi-ethnic-study-of-atherosclerosis
#5
V Subramanya, B Ambale-Venkatesh, Y Ohyama, D Zhao, C C Nwabuo, W S Post, E Guallar, P Ouyang, S J Shah, M A Allison, C E Ndumele, D Vaidya, D A Bluemke, J A Lima, E D Michos
Background: Women experience a steeper decline in aortic elasticity related to aging compared to men. We examined whether sex hormone levels were associated with ascending aortic distensibility (AAD) in the Multi-Ethnic Study of Atherosclerosis. Methods: We studied 1,345 post-menopausal women and 1,532 men aged 45-84 years, who had serum sex hormone levels, AAD measured by phase-contrast cardiac magnetic resonance imaging, and ejection fraction>50% at baseline...
February 19, 2018: American Journal of Hypertension
https://www.readbyqxmd.com/read/29470624/measuring-liver-t2-and-cardiac-t2-in-a-single-acquisition
#6
Suraj D Serai, Andrew T Trout, Robert J Fleck, Charles T Quinn, Jonathan R Dillman
PURPOSE: The purpose of this study is determine if both liver T2* and cardiac T2* can be measured on a single breath-hold acquisition. MATERIALS AND METHODS: For this IRB-approved retrospective study, 137 patients with dedicated Cardiac MRI and Liver MRI examinations obtained sequentially on 1.5T scanners and on the same day were included for analysis. Both the cardiac and liver MRI examinations utilized GRE sequences for quantification of tissue iron. Specifically, T2* was measured using an 8-echo, multi-echo gradient echo single breath-hold sequence...
February 22, 2018: Abdominal Radiology
https://www.readbyqxmd.com/read/29470603/cardiac-gated-intravoxel-incoherent-motion-diffusion-weighted-magnetic-resonance-imaging-for-the-investigation-of-intracranial-cerebrospinal-fluid-dynamics-in-the-lateral-ventricle-a-feasibility-study
#7
Eddie Surer, Cristina Rossi, Anton S Becker, Tim Finkenstaedt, Moritz C Wurnig, Antonios Valavanis, Sebastian Winklhofer
PURPOSE: Intravoxel incoherent motion (IVIM) in diffusion-weighted magnetic resonance imaging (DW-MRI) attributes the signal attenuation to the molecular diffusion and to a faster pseudo-diffusion. Purpose of the study was to demonstrate the feasibility of IVIM for the investigation of intracranial cerebrospinal fluid (CSF) dynamics. METHODS: Cardiac-gated DW-MRI images with fifteen b-values (0-1300s/mm2 ) along three orthogonal directions (mediolateral (ML), anteroposterior (AP), and craniocaudal (CC)) were acquired during maximum systole and diastole in 10 healthy volunteers (6 males, mean age 36 ± 15 years)...
February 22, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29468469/technical-aspects-of-cardiac-pet-mri
#8
Atsuro Masuda, Ayaka Nemoto, Yasuchika Takeishi
PET/MRI is a novel modality that enables to combine PET and MR images, and has significant potential to evaluate various cardiac diseases through the combination of PET molecular imaging and MRI functional imaging. Precise management of technical issues, however, is necessary for cardiac PET/MRI. This article describes several technical points, including patient preparation, MR attenuation correction, parallel acquisition of PET with MRI, clinical aspects, and image quality control.
February 21, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29468314/recent-advances-and-trends-in-pediatric-cardiac-imaging
#9
REVIEW
Wadi Mawad, Luc L Mertens
Cardiac imaging is central to today's pediatric cardiology practice not only to diagnose structural congenital defects and delineate cardiac and extracardiac anatomy but also for determining the hemodynamic impact of the structural defects and acquired pediatric diseases. Not so long ago, clinicians had to heavily rely on angiography as the main cardiac imaging modality to visualize the heart. Particularly, the development of echocardiography in the 1970s and 1980s together with the development of magnetic resonance imaging (MRI) and computed tomography (CT) resulted in a non-invasive diagnostic revolution with diagnostic catheterization becoming obsolete apart for very specific indications...
February 21, 2018: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29467999/the-correlation-of-cardiac-and-hepatic-hemosiderosis-as-measured-by-t2-mri-technique-with-ferritin-levels-and-hemochromatosis-gene-mutations-in-iranian-patients-with-beta-thalassemia-major
#10
Mohammad Soleiman Soltanpour, Kambiz Davari
Objectives: Organ-specific hemosiderosis and iron overload complications are more serious and more frequent in some patients with beta thalassemia major (BTM) compared with others. We investigated whether coinheritance of HFE H63D or C282Y gene mutations in patients with BTM contributes to the phenotypic variation of iron overload complications and assessed the correlation of cardiac and hepatic hemosiderosis with plasma ferritin levels. Methods: We studied 60 patients with BTM with a mean age of 17...
January 2018: Oman Medical Journal
https://www.readbyqxmd.com/read/29467359/evaluation-of-a-portable-doppler-ultrasound-gating-device-for-fetal-cardiac-mr-imaging-initial-results-at-1-5t-and-3t
#11
Fabian Kording, Bjoern P Schoennagel, Manuela Tavares de Sousa, Kai Fehrs, Gerhard Adam, Jin Yamamura, Christian Ruprecht
PURPOSE: Fetal cardiac MRI has the potential to play an important role in the assessment of fetal cardiac pathologies, but it is up to now not feasible due to a missing gating method. The purpose of this work was the evaluation of Doppler ultrasound (DUS) for external fetal cardiac gating with regard to compatibility, functionality, and reliability. Preliminary results were assessed performing fetal cardiac MRI. METHODS: An MRI conditional DUS device was developed to obtain a gating signal from the fetal heart...
February 21, 2018: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/29467047/myocardial-stress-perfusion-magnetic-resonance-in-children-with-hypertrophic-cardiomyopathy
#12
Lazaro E Hernandez
BACKGROUND: Microvascular dysfunction in hypertrophic cardiomyopathy has been associated with poor clinical outcome. Several studies have demonstrated a reduced perfusion reserve proportional to the magnitude of the hypertrophy. We investigated the utility of stress perfusion cardiac MRI to detect microvascular dysfunction in children with hypertrophic cardiomyopathy. METHODS: From January 2016 to January 2017, 13 patients, with a mean age of 15.3 years, with hypertrophic cardiomyopathy underwent regadenoson stress perfusion cardiac MRI (1...
February 22, 2018: Cardiology in the Young
https://www.readbyqxmd.com/read/29466491/the-presence-and-extension-of-myocardial-fibrosis-in-the-undetermined-form-of-chagas-disease-a-study-using-magnetic-resonance
#13
Marcia Maria Noya-Rabelo, Carolina The Macedo, Ticiana Larocca, Admilson Machado, Thais Pacheco, Jorge Torreão, Bruno Solano de Freitas Souza, Milena B P Soares, Ricardo Ribeiro-Dos-Santos, Luis Claudio Lemos Correia
BACKGROUND: Previous data has shown that patients in the indeterminate form of Chagas disease may present myocardial fibrosis as shown on through magnetic resonance imaging (MRI). However, there is little information available regarding the degree of severity of myocardial fibrosis in these individuals. This variable has the potential to predict the evolution of Chagas' disease into its cardiac form. OBJECTIVES: To describe the frequency and extent of myocardial fibrosis evaluated using an MRI in patients in the indeterminate form, and to compare it with other forms of the disease...
February 19, 2018: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/29466218/-structural-and-functional-properties-of-the-left-atrium-in-healthy-volunteers-and-patients-with-atrial-fibrillation-data-of-magnetic-resonance-imaging
#14
O V Stukalova, N A Mironova, S P Golitsyn, O P Aparina, D V Parkhomenko, E Y Strazdenj, S K Ternovoy
BACKGROUND: in the recent years, there has been an increasing number of publications postulating that data on left atrial (LA) structure obtained by late gadolinium enhancement magnetic resonance imaging (LGE MRI) can improve the management of patients with atrial fibrillation (AF). At the same time, similar data regarding healthy LA myocardium is limited. AIM: to assess structural and functional properties of LA in healthy volunteers (HV) using cardiac magnetic resonance (CMR) (including LGE MRI); to compare these properties in patients with AF and HV...
September 2017: Kardiologiia
https://www.readbyqxmd.com/read/29465376/efficient-detection-of-pulmonary-arterial-hypertension-using-serum-haptoglobin-level-and-cardiac-mri-in-patients-with-connective-tissue-diseases-a-pilot-study
#15
Hiroyuki Nakamura, Masaru Kato, Atsushi Nogochi, Hiroshi Ohira, Ichizo Tsujino, Tatsuya Atsumi
No abstract text is available yet for this article.
February 15, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29463283/neonatal-diagnosis-of-isolated-absence-of-the-right-pulmonary-artery-a-case-report-and-review-of-the-literature
#16
Akamin Raymond, Ettore Pedretti, Giuseppina Privitera, Cristina Cicero, Giacomo Biasucci
BACKGROUND: Unilateral absence of the pulmonary artery (UAPA) is a rare congenital malformation often associated with other cardiac anomalies; however it may occur as an isolated lesion. Isolated absence of the right pulmonary artery is twice more frequent than that of the left pulmonary artery. Patients with isolated UAPA are usually asymptomatic at birth; thereafter they may develop a progression of symptoms such as exercise intolerance, dyspnea, chest pain, hemoptysis and recurrent pulmonary infections...
February 20, 2018: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/29462642/memory-performance-global-cerebral-volumes-and-hippocampal-subfield-volumes-in-long-term-survivors-of-out-of-hospital-cardiac-arrest
#17
Marte C Ørbo, Torgil R Vangberg, Pål M Tande, Audny Anke, Per M Aslaksen
AIM: We explored the associations between global brain volumes, hippocampal subfield volumes and verbal memory performance in long-term survivors of out-of-hospital cardiac arrest (OHCA). METHODS: Three months after OHCA, survivors and healthy, age-matched controls were assessed with cerebral MRI and the California Verbal Learning Test-II (CVLT-II). Volumetric brain segmentation was performed automatically by FreeSurfer. RESULTS: Twenty-six OHCA survivors who were living independently in regular homes at the time of assessment and 19 controls participated in the study...
February 17, 2018: Resuscitation
https://www.readbyqxmd.com/read/29457116/a-spinal-cord-infarction-that-occurred-after-laparoscopic-gastrectomy-performed-under-general-anesthesia-and-epidural-analgesia
#18
Kei Houri, Shinichi Hamasaki, Takatoshi Tsujimoto, Tomohisa Uchida, Tatsushige Iwamoto, Toru Shirai, Shinichi Nakao
Background: Spinal cord infarction (SCI) after epidural anesthesia is quite rare. Although most cases of perioperative SCI are associated with aortic, cardiac, or spinal surgery, and/or abnormal preoperative conditions, such as spinal stenosis or hypercoagulopathy, intraoperative events, such as severe hypotension or epidural puncture and catheterization, can be contributory factors. Case presentation: A 52-year-old male was underwent laparoscopic gastrectomy. Before induction of general anesthesia, an epidural catheter was placed without any problems...
2018: JA Clin Rep
https://www.readbyqxmd.com/read/29450799/iron-oxide-labeling-does-not-affect-differentiation-potential-of-human-bone-marrow-mesenchymal-stem-cells-exhibited-by-their-differentiation-into-cardiac-and-neuronal-cells
#19
Sujata Mohanty, Krishan Gopal Jain, Sushmita Bose Nandy, Anupama Kakkar, Manoj Kumar, Amit Kumar Dinda, Harpal Singh, Alok Ray
Mesenchymal stem cells (MSCs) have shown promising outcomes in cardiac and neuronal diseases. Efficient and noninvasive tracking of MSCs is essential to harness their therapeutic potential. Iron oxide nanoparticles (IONPs) have emerged as effective means to label stem cells and visualize them using magnetic resonance imaging (MRI). It is known that IONPs do not affect viability and cell proliferation of stem cells. However, very few studies have demonstrated differentiation potential of iron oxide-labeled MSCs and their differentiation into specific lineages that can contribute to cellular therapies...
February 15, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29450409/microstructurally-anchored-cardiac-kinematics-by-combining-in-vivo-dense-mri-and-cdti
#20
Luigi E Perotti, Patrick Magrath, Ilya A Verzhbinsky, Eric Aliotta, Kévin Moulin, Daniel B Ennis
Metrics of regional myocardial function can detect the onset of cardiovascular disease, evaluate the response to therapy, and provide mechanistic insight into cardiac dysfunction. Knowledge of local myocardial microstructure is necessary to distinguish between isotropic and anisotropic contributions of local deformation and to quantify myofiber kinematics, a microstructurally anchored measure of cardiac function. Using a computational model we combine in vivo cardiac displacement and diffusion tensor data to evaluate pointwise the deformation gradient tensor and isotropic and anisotropic deformation invariants...
June 2017: Functional Imaging and Modeling of the Heart: ... International Workshop, FIMH ..., Proceedings. FIMH
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