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Cardiac MRI

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https://www.readbyqxmd.com/read/28535554/anesthetic-considerations-and-perioperative-management-of-spinal-cord-stimulators-literature-review-and-initial-recommendations
#1
Michael E Harned, Brandon Gish, Allison Zuelzer, Jay S Grider
BACKGROUND: Patients with implanted spinal cord stimulators (SCS) present to the anesthesia care team for management at many different points along the care continuum. Currently, the literature is sparse on the perioperative management. What is available is confusing; monopolar electrocautery is contraindicated but often used, full body magnetic resonance imaging (MRI) is safe with particular systems but with other manufactures only head and specific extremities exams are safe. Moreover, there are anesthetizing locations outside of the operating room where implanted SCS can interact with surrounding medical equipment and pose significant risk to patient and device...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535507/cardiac-cell-therapies-for-the-treatment-of-acute-myocardial-infarction-a-meta-analysis-from-mouse-studies
#2
Cajetan Immanuel Lang, Markus Wolfien, Anne Langenbach, Paula Müller, Olaf Wolkenhauer, Arash Yavari, Hüseyin Ince, Gustav Steinhoff, Bernd Joachim Krause, Robert David, Änne Glass
AIMS: Stem cell-based regenerative therapies for the treatment of ischemic myocardium are currently a subject of intensive investigation. A variety of cell populations have been demonstrated to be safe and to exert some positive effects in human Phase I and II clinical trials, however conclusive evidence of efficacy is still lacking. While the relevance of animal models for appropriate pre-clinical safety and efficacy testing with regard to application in Phase III studies continues to increase, concerns have been expressed regarding the validity of the mouse model to predict clinical results...
May 25, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28534201/cardiac-mri-as-a-useful-tool-to-differentiate-tumor-and-thrombus
#3
Rohit Maini, Taraka V Gadiraju, Ahmad Jabbar, Raman Danrad, Aaron Sweeney
No abstract text is available yet for this article.
May 22, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28534155/myocardial-delayed-enhancement-ct-initial-experience-in-children-and-young-adults
#4
Hyun Woo Goo
BACKGROUND: Clinical utility of myocardial delayed enhancement CT has not been reported in children and young adults. OBJECTIVE: To describe initial experience of myocardial delayed enhancement CT regarding image quality, radiation dose and identification of myocardial lesions in children and young adults. MATERIALS AND METHODS: Between August 2013 and November 2016, 29 consecutive children and young adults (median age 16 months) with suspected coronary artery or myocardial abnormality underwent arterial- and delayed-phase cardiac CT at our institution...
May 23, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28530083/-appropriateness-criteria-for-cardiac-mri-a-joint-position-paper-from-the-israeli-radiological-society-and-the-israel-heart-society
#5
Orly Goitein, Galit Aviram, Naama Bogot, Ronen Durst, Yonatan Lessick, Subhi Abadi, Ashraf Hamdan, Natalia Simanovsky, Yishay Salem, Eli Konen, Gad Keren, Arik Wolak
No abstract text is available yet for this article.
September 2016: Harefuah
https://www.readbyqxmd.com/read/28528164/mri-derived-myocardial-strain-measures-in-normal-subjects
#6
Ha Q Vo, Thomas H Marwick, Kazuaki Negishi
OBJECTIVES: The aim of this study was to perform a systematic review and meta-analysis to estimate the normal ranges of magnetic resonance imaging (MRI)-based feature tracking (FT) and to identify sources of variations. Similar analyses were also performed for strain encoding, displacement encoding with stimulated echoes, and myocardial tagging. BACKGROUND: MRI-FT is a novel technique for quantification of myocardial deformation using MRI cine images. However, the reported 95% confidence intervals (CIs) from the 2 largest studies have no overlaps...
May 11, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28523341/cost-of-unnecessary-testing-in-the-evaluation-of-pediatric-syncope
#7
Connor Redd, Cameron Thomas, Martha Willis, Michelle Amos, Jeffrey Anderson
Syncope is a common and a typically benign clinical problem in children and adolescents. The majority of tests ordered in otherwise healthy pediatric patients presenting with syncope have low diagnostic yield. This study quantifies testing and corresponding patient charges in a group of pediatric patients presenting for outpatient evaluation for syncope. Patients seen between 3/2011 and 4/2013 in the multi-disciplinary Syncope Clinic at Cincinnati Children's Hospital Medical Center were enrolled in a registry which was reviewed for patient information...
May 18, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28522763/aortic-arch-compliance-and-idiopathic-unilateral-vocal-fold-paralysis
#8
Reza Behkam, Kara E Roberts, Andrew J Bierhals, M Eileen Jacobs, Julia D Edgar, Randal C Paniello, Gayle Woodson, Jonathan P Vande Geest, Julie M Barkmeier-Kraemer
Unilateral vocal fold paralysis (UVP) occurs related to recurrent laryngeal nerve (RLN) impairment associated with impaired swallowing, voice production, and breathing functions. The majority of UVP cases occur subsequent to surgical intervention with approximately 12-42% having no known cause for the disease (i.e., idiopathic). Approximately 2/3 of those with UVP exhibit left-sided injury with the average onset at 50 years of age or older in those diagnosed as idiopathic. Given the association between the RLN and the subclavian and aortic arch vessels, we hypothesized that changes in vascular tissues would result in increased aortic compliance in idiopathic left-sided UVP patients compared to those without UVP...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28516047/prospective-cardiac-motion-self-gating
#9
Fei Han, Stanislas Rapacchi, Peng Hu
BACKGROUND: To develop a prospective cardiac motion self-gating method that provides robust and accurate cardiac triggers in real time. METHODS: The proposed self-gating method consists of an "imaging mode" that acquires the k-space segments and a "self-gating mode" that captures the cardiac motion by repeatedly sampling the k-space centerline. A training based principal component analysis algorithm is utilized to process the self-gating data where the projection onto the first principal component was used as the self-gating signal...
April 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28507569/effects-of-a-novel-ascorbate-based-protocol-on-infarct-size-and-ventricle-function-in-acute-myocardial-infarction-patients-undergoing-percutaneous-coronary-angioplasty
#10
Cristóbal Ramos, Roberto Brito, Jaime González-Montero, Nicolás Valls, Juan G Gormaz, Juan C Prieto, Rubén Aguayo, Ángel Puentes, Viviana Noriega, Gonzalo Pereira, Tamara Palavecino, Ramón Rodrigo
INTRODUCTION: This study was designed to test the hypothesis that high-dose ascorbate prior to reperfusion followed by low chronic oral doses ameliorate myocardial reperfusion injury (MRI) in acute myocardial infarction patients subjected to primary percutaneous coronary angioplasty (PCA). MATERIAL AND METHODS: A randomized double-blind placebo-controlled and multicenter clinical trial was performed on acute myocardial infarction (AMI) patients who underwent PCA...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28506600/cardiac-hemangioma-caused-ventricular-arrhythmia-a-rare-case-and-literature-review
#11
Yanqiu Wang, Shuang Liu, Jun Yang, Tianxiang Gu, Limin Zhang
Cardiac hemangioma is a rare primary cardiac tumor. We reported the case of patient with left ventricular hemangioma who was referred to our hospital complaining of palpitation for one week. 24 h Holter revealed high episode of ventricular arrhythmia. Echocardiography showed a mass at left ventricle, which was also confirmed by MRI. The mass was successfully resected and postoperative pathology confirmed cardiac capillary hemangioma. The patient recovered well with no cardiac arrhythmia after surgery over 12 months of follow-up...
May 3, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/28497486/5d-whole-heart-sparse-mri
#12
Li Feng, Simone Coppo, Davide Piccini, Jerome Yerly, Ruth P Lim, Pier Giorgio Masci, Matthias Stuber, Daniel K Sodickson, Ricardo Otazo
PURPOSE: A 5D whole-heart sparse imaging framework is proposed for simultaneous assessment of myocardial function and high-resolution cardiac and respiratory motion-resolved whole-heart anatomy in a single continuous noncontrast MR scan. METHODS: A non-electrocardiograph (ECG)-triggered 3D golden-angle radial balanced steady-state free precession sequence was used for data acquisition. The acquired 3D k-space data were sorted into a 5D dataset containing separated cardiac and respiratory dimensions using a self-extracted respiratory motion signal and a recorded ECG signal...
May 11, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28496094/apical-hypertrophic-cardiomyopathy-case-report-and-literature-review
#13
Tanya Doctorian, William J Mosley, Bao Do
BACKGROUND Apical hypertrophic cardiomyopathy (ApHCM) is a relatively rare form of hypertrophic cardiomyopathy that predominantly affects the apex of the left ventricle and typically has a nonobstructive physiology. Its variable presentation and clinical course render ApHCM a commonly delayed or missed diagnosis. CASE REPORT A 53-year-old Caucasian woman presented with chronic progressive chest pain. She was initially started on treatment for acute coronary syndrome. Diagnosis of ApHCM was initially missed on echocardiography, but made on subsequent cardiac catheterization and cardiac MRI...
May 12, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28495248/clinical-benefits-echocardiographic-and-mri-assessment-after-pulmonary-sequestration-treatment
#14
Francesco Borgia, Francesca Santamaria, Carmine Mollica, Felice Mongiello, Francesca Esposito, Gaetano Palma, Luca Botta, Silvia Montella, Bruno Trimarco, Antonio Rapacciuolo
BACKGROUND: This study aimed to explore systematically procedural results, clinical benefits with echocardiographic and chest-MRI assessment of pulmonary sequestration percutaneous treatment. METHODS: 13 consecutive infants and children with diagnosis of isolated pulmonary sequestration (PS) had percutaneous closure of the aberrant artery supplying pulmonary sequestration between 2010 and 2015. By protocol, echocardiographic and chest-MRI assessment was performed before and respectively at 6-12months and 1year with the aim to study the effects of embolization on heart volume overload and regression of pulmonary sequestration...
May 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28494271/motion-robust-parameter-estimation-in-abdominal-diffusion-weighted-mri-by-simultaneous-image-registration-and-model-estimation
#15
Sila Kurugol, Moti Freiman, Onur Afacan, Liran Domachevsky, Jeannette M Perez-Rossello, Michael J Callahan, Simon K Warfield
Quantitative body DW-MRI can detect abdominal abnormalities as well as monitor response-to-therapy for applications including cancer and inflammatory bowel disease with increased accuracy. Parameter estimates are obtained by fitting a forward model of DW-MRI signal decay to the observed data acquired with several b-values. The DW-MRI signal decay models typically used do not account for respiratory, cardiac and peristaltic motion, however, which may deteriorate the accuracy and robustness of parameter estimates...
May 3, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28493867/transplantation-of-purified-ipsc-derived-cardiomyocytes-in-myocardial-infarction
#16
Sebastian V Rojas, George Kensah, Alexander Rotaermel, Hassina Baraki, Ingo Kutschka, Robert Zweigerdt, Ulrich Martin, Axel Haverich, Ina Gruh, Andreas Martens
BACKGROUND: Induced pluripotent stem cells (iPSC) can be differentiated into cardiomyocytes and represent a possible autologous cell source for myocardial repair. We analyzed the engraftment and functional effects of murine iPSC-derived cardiomyocytes (iPSC-CMs) in a murine model of myocardial infarction. METHODS AND RESULTS: To maximize cardiomyocyte yield and purity a genetic purification protocol was applied. Murine iPSCs were genetically modified to express a Zeocin™ resistance gene under control of the cardiac-specific α-myosin heavy chain (α-MHC, MYH6) promoter...
2017: PloS One
https://www.readbyqxmd.com/read/28493526/real-time-mri-guidance-of-cardiac-interventions
#17
Adrienne E Campbell-Washburn, Mohammad A Tavallaei, Mihaela Pop, Elena K Grant, Henry Chubb, Kawal Rhode, Graham A Wright
Cardiac magnetic resonance imaging (MRI) is appealing to guide complex cardiac procedures because it is ionizing radiation-free and offers flexible soft-tissue contrast. Interventional cardiac MR promises to improve existing procedures and enable new ones for complex arrhythmias, as well as congenital and structural heart disease. Guiding invasive procedures demands faster image acquisition, reconstruction and analysis, as well as intuitive intraprocedural display of imaging data. Standard cardiac MR techniques such as 3D anatomical imaging, cardiac function and flow, parameter mapping, and late-gadolinium enhancement can be used to gather valuable clinical data at various procedural stages...
May 11, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28490683/-concomitant-surgery-for-symptomatic-severe-carotid-artery-stenosis-and-aortic-valve-stenosis-with-contralateral-internal-carotid-artery-occlusion-a-case-report
#18
Tomonori Takeshita, Kohei Ishihara, Yuu Murakami, Hiroshi Munakata, Katsuhito Mabuni, Tadao Kugai, Tomoaki Nagamine
We report a case of concomitant carotid endarterectomy(CEA)and aortic valve replacement(AVR)for symptomatic severe carotid artery and aortic valve stenosis(AS). A 77-year-old man, presented to our hospital with AS complicated by right internal carotid artery(ICA)stenosis and left ICA occlusion, seeking treatment for AS. He suffered from left hemiparesis, and diffusion-weighted magnetic resonance imaging(MRI)showed multiple ischemic lesions in the right cerebral hemisphere. He was admitted to our neurosurgical department and received treatment for acute cerebral infarction caused by severe right ICA stenosis...
May 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28487150/opening-of-calcium-activated-potassium-channels-improves-long-term-left-ventricular-function-after-coronary-artery-occlusion-in-mice
#19
Friederike Behmenburg, Nina Hölscher, Ulrich Flögel, Markus W Hollmann, André Heinen, Ragnar Huhn
BACKGROUND: Opening of mitochondrial calcium-activated potassium channels (BKCa) reduces infarct size after myocardial ischemia/reperfusion injury (I/R). It is unknown if targeting BKCa-channels improves cardiac performance in the long-term after I/R. METHODS: Experiments were conducted in compliance with institutional and national guidelines in C57BL/6 mice (n=7-8/group). Animals were randomized into two groups. Preconditioning was induced by intraperitoneal application of NS1619 (NS, 1μg/g bw) 10min before ischemia, control animals (Con) received the vehicle...
April 27, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28486936/effects-of-inaccuracies-in-arterial-path-length-measurement-on-differences-in-mri-and-tonometry-measured-pulse-wave-velocity
#20
Jonathan R Weir-McCall, Faisel Khan, Deirdre B Cassidy, Arsh Thakur, Jennifer Summersgill, Shona Z Matthew, Fiona Adams, Fiona Dove, Stephen J Gandy, Helen M Colhoun, Jill Jf Belch, J Graeme Houston
BACKGROUND: Carotid-femoral pulse wave velocity (cf-PWV) and aortic PWV measured using MRI (MRI-PWV) show good correlation, but with a significant and consistent bias across studies. The aim of the current study was to evaluate whether the differences between cf.-PWV and MRI-PWV can be accounted for by inaccuracies of currently used distance measurements. METHODS: One hundred fourteen study participants were recruited into one of 4 groups: Type 2 diabetes melltus (T2DM) with cardiovascular disease (CVD) (n = 23), T2DM without CVD (n = 41), CVD without T2DM (n = 25) and a control group (n = 25)...
May 10, 2017: BMC Cardiovascular Disorders
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