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Cardiac magnetic resonance imaging

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https://www.readbyqxmd.com/read/28730842/comparison-of-distinctive-clinical-and-cardiac-magnetic-resonance-features-between-st-elevation-myocardial-infarction-patients-with-incomplete-myocardial-rupture-and-those-with-moderate-to-severe-pericardial-effusion
#1
Víctor Pineda, Jaume Figueras, Sergio Moral, Jordi Bañeras, José Rodríguez-Palomares, Artur Evangelista, David García-Dorado
BACKGROUND: Whether patients with incomplete myocardial rupture (IMR) present distinctive clinical and cardiac magnetic resonance features from those with moderate-severe pericardial effusion (⩾10 mm (PE)) remains unknown Methods: We compared the clinical, angiographic and cardiac magnetic resonance characteristics of nine patients with IMR (diagnosed angiographically and/or by cardiac magnetic resonance) with 29 with PE, and also with 38 without IMR or PE with evidence of transmural necrosis (reference group) matched for age, gender and year of admission...
July 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28729524/cardiac-arrest-following-drug-abuse-with-intravenous-tapentadol-case-report-and-literature-review
#2
Misbahuddin Khaja, George Lominadze, Konstantin Millerman
BACKGROUND Tapentadol is a centrally acting opioid analgesic, with a dual mode of action, as a norepinephrine reuptake inhibitor and an agonist of the μ-opioid receptor (MOR). Tapentadol is used for the management of musculoskeletal pain, and neuropathic pain associated with diabetic peripheral neuropathy. CASE REPORT A 32-year-old woman attended hospital for evaluation of an intractable headache. Computed tomography and magnetic resonance imaging of the brain were negative. She was found unresponsive in the bathroom on the day following hospital admission, and despite resuscitative measures, the patient died following cardiac arrest...
July 21, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28728865/mass-spring-models-for-the-simulation-of-mitral-valve-function-looking-for-a-trade-off-between-reliability-and-time-efficiency
#3
O A Pappalardo, F Sturla, F Onorati, G Puppini, M Selmi, G B Luciani, G Faggian, A Redaelli, E Votta
Patient-specific finite element (FE) models can assess the impact of mitral valve (MV) repair on the complex MV anatomy and function. However, FE excessive time requirements hamper their use for surgical planning; mass-spring models (MSMs) represent a more approximate approach but can provide almost real-time simulations. On this basis, we implemented MSMs of three healthy MVs from cardiac magnetic resonance (cMR) imaging to simulate the systolic MV closure, including the in vivo papillary muscles and annular kinematics, and the anisotropic and non-linear mechanical response of MV tissues...
July 17, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28728692/magnetic-resonance-in-transthyretin%C3%A2-cardiac-amyloidosis
#4
Ana Martinez-Naharro, Thomas A Treibel, Amna Abdel-Gadir, Heerajnarain Bulluck, Giulia Zumbo, Daniel S Knight, Tushar Kotecha, Rohin Francis, David F Hutt, Tamer Rezk, Stefania Rosmini, Candida C Quarta, Carol J Whelan, Peter Kellman, Julian D Gillmore, James C Moon, Philip N Hawkins, Marianna Fontana
BACKGROUND: Cardiac transthyretin amyloidosis (ATTR) is an increasingly recognized cause of heart failure. Cardiac magnetic resonance (CMR), with late gadolinium enhancement (LGE) and T1 mapping, is emerging as a reference standard for diagnosis and characterization of cardiac amyloidosis. OBJECTIVES: The authors used CMR with extracellular volume fraction (ECV) measurement to characterize cardiac involvement in relation to outcome in ATTR. METHODS: Subjects comprised 263 patients with cardiac ATTR corroborated by grade 2 to 3 (99m)Tc-DPD ((99m)Tc-3,3-diphosphono-1,2-propanodicarboxylic acid) cardiac uptake, 17 with suspected cardiac ATTR (grade 1 (99m)Tc-DPD), and 12 asymptomatic individuals with amyloidogenic transthyretin (TTR) mutations...
July 25, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28725213/can-brain-natriuretic-peptides-and-osteoprotegerin-serve-as-biochemical-markers-for-the-detection-of-aortic-pathology-in-children-and-adolescents-with-turner-syndrome
#5
REVIEW
Meenal Mavinkurve, Clodagh S O'Gorman
Turner syndrome (TS) is a chromosomal disorder that affects 1:2,000 females. It results from either the complete or partial loss of the X chromosome as well as other aberrations. Clinical features of TS include short stature, delayed puberty, and congenital cardiac malformations. TS children also have an increased prevalence of cardiometabolic risk factors, which predisposes them to complications like coronary artery disease, cerebrovascular-related deaths, and aortic dissection. Early cardiac imaging, such as echocardiography and cardiac magnetic resonance imaging, are recommended to detect underlying aortic pathology...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28724650/dynamic-relation-of-changes-in-weight-and-indices-of-fat-distribution-with-cardiac-structure-and-function-the-dallas-heart-study
#6
Bryan Wilner, Sonia Garg, Colby R Ayers, Christopher D Maroules, Roderick McColl, Susan A Matulevicius, James A de Lemos, Mark H Drazner, Ronald Peshock, Ian J Neeland
BACKGROUND: Obesity may increase heart failure risk through cardiac remodeling. Cross-sectional associations between adiposity and cardiac structure and function have been elucidated, but the impact of longitudinal changes in adiposity on cardiac remodeling is less well understood. METHODS AND RESULTS: Participants in the Dallas Heart Study without cardiovascular disease or left ventricular dysfunction underwent assessment of body weight, anthropometrics, and cardiac magnetic resonance imaging at baseline and 7 years later...
July 19, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28722201/susceptibility-induced-distortion-correction-in-hyperpolarized-echo-planar-imaging
#7
Jack J Miller, Angus Z Lau, Damian J Tyler
PURPOSE: Echo planar imaging is an attractive rapid imaging readout that can image hyperpolarized compounds in vivo. By alternating the sign of the phase encoding gradient waveform, spatial offsets arising from uncertain frequency shifts can be determined. We show here that blip-reversed echo planar imaging can also be used to correct for susceptibility and B0 inhomogeneity effects that would otherwise produce image-domain distortion in the heart. METHODS: Previously acquired blip-reversed cardiac 3D-Spectral-Spatial echo planar imaging volumetric timecourses of hyperpolarized [1-(13) C]pyruvate were distortion corrected by a deformation field estimated by reconstructing signal-to-noise ratio (SNR)-weighted progressively subsampled temporally summed images of each metabolite...
July 19, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28720123/cardiovascular-magnetic-resonance-in-an-adult-human-population-serial-observations-from-the-multi-ethnic-study-of-atherosclerosis
#8
REVIEW
Kihei Yoneyama, Bharath A Venkatesh, David A Bluemke, Robyn L McClelland, João A C Lima
The Multi-Ethnic Study of Atherosclerosis (MESA) is the first large-scale multi-ethnic population study in the U.S. to use advanced cardiovascular magnetic resonance (CMR) imaging. MESA participants were free of cardiovascular disease at baseline between 2000 and 2002, and were followed up between 2009 and 2011 with repeated CMR examinations as part of MESA. CMR allows the clinician to visualize and accurately quantify volume and dimensions of all four cardiac chambers; measure systolic and diastolic ventricular function; assess myocardial fibrosis; assess vessel lumen size, vessel wall morphology, and vessel stiffness...
July 18, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28717781/spinal-cord-infarction-mimicking-ischemic-heart-disease
#9
Dae Won Lee, Yoon Hee Choi
Spinal cord infarction is a rare condition and is easily misdiagnosed owing to its initial non-specific manifestation. We report a case of a 77-year-old man who presented with chest pain and upper back pain initially, and was misdiagnosed with a myocardial infarction. Four hours after admission, he complained of numbness in his entire left leg below the knee, with rapid deterioration of neurological symptoms. After 9 hours, loss of sensation progressed up to the T4 dermatome, strength of both lower extremities deteriorated to grade 0, and decrease in anal tone and deep tendon reflex was observed...
June 2017: Clinical and Experimental Emergency Medicine
https://www.readbyqxmd.com/read/28716007/silent-myocarditis-in-systemic-sclerosis-detected-by-cardiovascular-magnetic-resonance-using-lake-louise-criteria
#10
Sophie Mavrogeni, Loukia Koutsogeorgopoulou, Georgia Karabela, Efthymios Stavropoulos, Gikas Katsifis, John Raftakis, Sotiris Plastiras, Michel Noutsias, George Markousis-Mavrogenis, Genovefa Kolovou
BACKGROUND: Systemic sclerosis (SSc) is an autoimmune disease characterized by microvascular abnormalities, inflammation and fibrosis. We hypothesized that myocarditis may be diagnosed in asymptomatic SSc, undergoing routine cardio-vascular magnetic resonance (CMR) for fibrosis assessment, using the Lake Louise criteria: T2 ratio, early (EGE) and late gadolinium enhanced (LGE) images. METHODS: Eighty-two asymptomatic SSc, diagnosed according to American College of Rheumatology criteria, aged 43 ± 5 yrs...
July 17, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28715316/virtual-humans-for-implantable-device-safety-assessment-in-mri-mitigating-magnetic-resonance-imaging-hazards-for-implanted-medical-devices
#11
James E Brown, Rui Qiang, Paul J Stadnik, Larry J Stotts, Jeffrey A Von Arx
Magnetic resonance imaging (MRI) is the preferred modality for soft tissue imaging because of its nonionizing radiation and lack of contrast agent. Due to interactions between the MR system and active implantable medical devices (AIMDs), patients with implants such as pacemakers are generally denied access to MRI, which presents a detriment to that population. It has been estimated that 50-75% of patients with a cardiac device were denied access to MRI scanning and, moreover, that 17% of pacemaker patients need an MRI within 12 months of implantation [1]...
July 2017: IEEE Pulse
https://www.readbyqxmd.com/read/28713835/rapid-detection-of-the-mt3243a%C3%A2-%C3%A2-g-mutation-using-urine-sediment-in-elderly-chinese-type-2-diabetic-patients
#12
Yinan Zhang, Xiujuan Du, Xinqian Geng, Chen Chu, Huijuan Lu, Yixie Shen, Ruihua Chen, Pingyan Fang, Yanmei Feng, Xiaojie Zhang, Yan Chen, Yanping Zhou, Congrong Wang, Weiping Jia
OBJECTIVE: In this study, we aimed to identify mt3243A > G mutation carriers in a group of Chinese elderly type 2 diabetic patients by a rapid and noninvasive diagnostic system. METHODS: DNA was extracted from blood, saliva, and urine sediment samples. The mutation screening and quantitation of heteroplasmy were performed by high-resolution melting (HRM) curve and pyrosequencing, respectively. Patients with mt3243A > G mutation underwent a detailed audiometric, ophthalmologic, neurological, and cardiac examination...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28713026/cardiac-magnetic-resonance-imaging-to-guide-ventricular-tachycardia-ablation-are-we-there
#13
EDITORIAL
Elad Anter
No abstract text is available yet for this article.
July 13, 2017: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/28708550/unsupervised-myocardial-segmentation-for-cardiac-bold
#14
Ilkay Oksuz, Anirban Mukhopadhyay, Rohan Dharmakumar, Sotirios A Tsaftaris
A fully automated 2D+time myocardial segmentation framework is proposed for Cardiac Magnetic Resonance (CMR) Blood-Oxygen-Level-Dependent (BOLD) datasets. Ischemia detection with CINE BOLD CMR relies on spatiotemporal patterns in myocardial intensity but these patterns also trouble supervised segmentation methods, the de-facto standard for myocardial segmentation in cine MRI. Segmentation errors severely undermine the accurate extraction of these patterns. In this paper we build a joint motion and appearance method that relies on dictionary learning to find a suitable subspace...
July 12, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28707575/bayes-syndrome-and-imaging-techniques
#15
Ivan Hernandez Betancor, Maria Manuela Izquierdo-Gomez, Javier Garcia Niebla, Ignacio Laynez-Cerdeña, Martin Jesus Garcia-Gonzalez, Antonio Barragan-Acea, Jose Luis Iribarren-Sarriá, Juan Jose Jimenez-Rivera, Juan Lacalzada-Almeida
Interatrial block (IAB) is due to disruption in the Bachmann region (BR). According to whether interatrial electrical conduction is delayed or completely blocked through the BR, it can be classified as IAB of first, second or third degree. On the surface electrocardiogram, a P wave ≥ 120 ms (partial IAB) is observed or associated to the prolongation of the P wave with a biphasic (positive / negative) morphology in the inferior leads (advanced IAB). Bayes syndrome is defined as an advanced IAB associated with atrial arrhythmia, more specifically atrial fibrillation...
July 13, 2017: Current Cardiology Reviews
https://www.readbyqxmd.com/read/28707150/-cardiac-magnetic-resonance-imaging-the-significance-of-the-calculated-extracellular-volume-as-a-marker-of-diffuse-myocardial-fibrosis
#16
https://www.readbyqxmd.com/read/28706743/when-is-the-optimal-timing-of-surgical-intervention-for-severe-functional-tricuspid-regurgitation
#17
Nobuhiro Nakanishi, Masanobu Ishii, Koichi Kaikita, Ken Okamoto, Yasuhiro Izumiya, Eiichiro Yamamoto, Seiji Takashio, Seiji Hokimoto, Toshihiro Fukui, Kenichi Tsujita
Functional tricuspid regurgitation (TR) is a serious pathology to be noted for severe right heart failure (HF) and poor prognosis; however, the conventional assessment of TR has some limitations and the optimal timing of surgical intervention remains unclear. A 79-year-old Japanese female was admitted to our hospital to undergo cardiac surgery, because edema gradually got worse despite the increase in diuretics. She had a history of atrial fibrillation (AF) and chronic HF due to severe TR and had been treated with a furosemide for leg edema 4 years ago...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28705875/electrical-and-structural-substrate-of-arrhythmogenic-right-ventricular-cardiomyopathy-determined-using-noninvasive-electrocardiographic-imaging-and-late-gadolinium-magnetic-resonance-imaging
#18
Christopher M Andrews, Neil T Srinivasan, Stefania Rosmini, Heerajnarain Bulluck, Michele Orini, Sharon Jenkins, Antonis Pantazis, William J McKenna, James C Moon, Pier D Lambiase, Yoram Rudy
BACKGROUND: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a significant cause of sudden cardiac death in the young. Improved noninvasive assessment of ARVC and better understanding of the disease substrate are important for improving patient outcomes. METHODS AND RESULTS: We studied 20 genotyped ARVC patients with a broad spectrum of disease using electrocardiographic imaging (a method for noninvasive cardiac electrophysiology mapping) and advanced late gadolinium enhancement cardiac magnetic resonance scar imaging...
July 2017: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/28705053/cardiac-amyloidosis-pathogenesis-clinical-context-diagnosis-and-management-options
#19
Hassan Alkhawam, Darshan Patel, James Nguyen, Saumya Mariam Easaw, Mohammed Al-Sadawi, Umer Syed, Feras Zaiem, Maher Homsi, Timothy J Vittorio
Amyloidosis covers a group of disorders that can manifest in virtually any organ system in the body and is thought to be secondary to misfolding of extracellular proteins with subsequent deposition in tissues. The precursor protein that is produced in excess defines the specific amyloid type. This requires histopathological confirmation using Congo-red dye with its characteristic demonstration of green birefringence under cross-polarized light. There are three main types of amyloidosis associated with cardiac involvement: light-chain (AL), familial or senile (ATTR), and secondary (AA) amyloidosis...
July 14, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28697895/a-neonatal-rat-model-of-increased-right-ventricular-afterload-by-pulmonary-artery-banding
#20
Shoubao Wang, Lincai Ye, Haifa Hong, Chao Tang, Minghui Li, Zhen Zhang, Jinfen Liu
OBJECTIVE: To construct a neonatal rat model of increased right ventricular (RV) afterload for studying the pathophysiological remodeling of the right ventricle in patients with congenital heart disease with increased RV afterload. METHODS: Surgery was performed within 6 hours after birth. Horizontal thoracotomy was performed by dissecting the intercostal muscles and splitting the sternum. The PA was then banded with 11-0 nylon thread. At postnatal day 7 (P7), constriction of PA was confirmed by echocardiography...
June 13, 2017: Journal of Thoracic and Cardiovascular Surgery
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