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positron emission tomography perfusion

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https://www.readbyqxmd.com/read/28534652/a-review-of-the-evidence-of-zolpidem-efficacy-in-neurological-disability-after-brain-damage-due-to-stroke-trauma-and-hypoxia-a-justification-of-further-clinical-trials
#1
J A Sutton, R P Clauss
During 15 years, 23 clinical reports and 6 studies have demonstrated associations between sub-sedative doses of zolpidem and recoveries from brain damage due to strokes, trauma and hypoxia. Clinical findings include unexpected awakenings from vegetative states and regressions of stroke symptoms after dosing that disappear during elimination and reappear on repeat dosing. Initially single-photon emission computed tomography scans showed improved perfusion within, around and distant from infarctions. Then positron emission tomography scans and electroencephalography detected renewed metabolic and neuronal activity...
May 23, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28528146/prognostic-value-of-coronary-ct-angiography-with-selective-pet-perfusion-imaging-in-coronary-artery-disease
#2
Teemu Maaniitty, Iida Stenström, Jeroen J Bax, Valtteri Uusitalo, Heikki Ukkonen, Sami Kajander, Maija Mäki, Antti Saraste, Juhani Knuuti
OBJECTIVES: The purpose of this study was to evaluate the prognostic value of sequential hybrid imaging strategy in which positron emission tomography (PET) perfusion imaging is performed selectively in patients with suspected obstructive coronary artery disease (CAD) on coronary computed tomography angiography (CTA). BACKGROUND: Coronary CTA is an accurate diagnostic test for excluding obstructive CAD. However, the positive predictive value is suboptimal. METHODS: We investigated 864 consecutive symptomatic patients with intermediate probability of CAD who adhered to the sequential imaging approach...
May 15, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28526033/effects-of-exenatide-on-cardiac-function-perfusion-and-energetics-in-type-2-diabetic-patients-with-cardiomyopathy-a-randomized-controlled-trial-against-insulin-glargine
#3
Weena J Y Chen, Michaela Diamant, Karin de Boer, Hendrik J Harms, Lourens F H J Robbers, Albert C van Rossum, Mark H H Kramer, Adriaan A Lammertsma, Paul Knaapen
BACKGROUND: Multiple bloodglucose-lowering agents have been linked to cardiovascular events. Preliminary studies showed improvement in left ventricular (LV) function during glucagon-like peptide-1 receptor agonist administration. Underlying mechanisms, however, are unclear. The purpose of this study was to investigate myocardial perfusion and oxidative metabolism in type 2 diabetic (T2DM) patients with LV systolic dysfunction as compared to healthy controls. Furthermore, effects of 26-weeks of exenatide versus insulin glargine administration on cardiac function, perfusion and oxidative metabolism in T2DM patients with LV dysfunction were explored...
May 19, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28512722/status-of-cardiovascular-pet-radiation-exposure-and-strategies-for-reduction-an-information-statement-from-the-cardiovascular-pet-task-force
#4
James A Case, Robert A deKemp, Piotr J Slomka, Mark F Smith, Gary V Heller, Manuel D Cerqueira
Cardiovascular positron emission tomography (PET) imaging provides high-quality visual and quantitative myocardial perfusion and function images. In addition, cardiovascular PET can assess myocardial viability, myocardial inflammatory disorders such as cardiac sarcoid, and infections of implanted devices including pacemakers, ventricular assist devices, and prosthetic heart valves. As with all nuclear cardiology procedures, the benefits need to be considered in relation to the risks of exposure to radiation...
May 16, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28474327/pet-imaging-in-heart-failure-the-role-of-new-tracers
#5
REVIEW
Antti Saraste, Juhani Knuuti
Positron emission tomography (PET) myocardial perfusion imaging is being increasingly used for the detection of coronary artery disease. In the presence of significant left ventricle dysfunction, the assessment of myocardial ischemia and viability by PET plays a role in the identification of patients who may benefit from revascularization. In addition to these, new PET tracers may play a role in the assessment of underlying pathophysiology and therapeutic options in heart failure. Studies have shown the ability of sympathetic innervation imaging to assess the risk of cardiac death, arrhythmia, and disease progression...
May 5, 2017: Heart Failure Reviews
https://www.readbyqxmd.com/read/28473616/mini-review-on-cardiac-metabolic-imaging-current-imaging-modalities-and-future-perspectives
#6
Tineke van de Weijer, Elisabeth Helena Maria Paiman, Hildo J Lamb
In this review, current imaging techniques and their future perspectives in the field of cardiac metabolic imaging in humans are discussed. This includes a range of non-invasive imaging techniques allowing a detailed investigation of cardiac metabolism in health and disease. The main imaging modalities discussed are Magnetic Resonance Spectroscopy (MRS) techniques for determination of metabolite content (triglycerides, glucose, ATP, phosphocreatine and so on), MRI (for myocardial perfusion) Single Photon Emession Computed Tomography (SPECT) and Positron Emission Tomography (PET) for quantitation of perfusion and substrate uptake...
May 4, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28473401/ranolazine-in-symptomatic-diabetic-patients-without-obstructive-coronary-artery-disease-impact-on-microvascular-and-diastolic-function
#7
Nishant R Shah, Michael K Cheezum, Vikas Veeranna, Stephen J Horgan, Viviany R Taqueti, Venkatesh L Murthy, Courtney Foster, Jon Hainer, Karla M Daniels, Jose Rivero, Amil M Shah, Peter H Stone, David A Morrow, Michael L Steigner, Sharmila Dorbala, Ron Blankstein, Marcelo F Di Carli
BACKGROUND: Treatments for patients with myocardial ischemia in the absence of angiographic obstructive coronary artery disease are limited. In these patients, particularly those with diabetes mellitus, diffuse coronary atherosclerosis and microvascular dysfunction is a common phenotype and may be accompanied by diastolic dysfunction. Our primary aim was to determine whether ranolazine would quantitatively improve exercise-stimulated myocardial blood flow and cardiac function in symptomatic diabetic patients without obstructive coronary artery disease...
May 4, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28465300/randomized-trial-comparing-the-effects-of-ticagrelor-versus-clopidogrel-on-myocardial-perfusion-in-patients-with-coronary-artery-disease
#8
Matthieu Pelletier-Galarneau, Chad R R N Hunter, Kathryn J Ascah, Rob S B Beanlands, Girish Dwivedi, Robert A deKemp, Benjamin J W Chow, Terrence D Ruddy
BACKGROUND: Ticagrelor is a P2Y12 receptor inhibitor used in acute coronary syndromes to reduce platelet activity and to decrease thrombus formation. Ticagrelor is associated with a reduction in mortality incremental to that observed with clopidogrel, potentially related to its non-antiplatelet effects. Evidence from animal models indicates that ticagrelor potentiates adenosine-induced myocardial blood flow (MBF) increases. We investigated MBF at rest and during adenosine-induced hyperemia in patients with stable coronary artery disease treated with ticagrelor versus clopidogrel...
May 2, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28452006/false-positive-13-n-ammonia-positron-emission-tomography-perfusion-scan-caused-by-misalignment-of-adjacent-lung-activity-during-attenuation-correction
#9
Daniel Juneau, Terrence D Ruddy, Rob S B Beanlands, Robert A deKemp
No abstract text is available yet for this article.
April 27, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28434708/dual-phase-18-f-florbetapir-positron-emission-tomography-in-patients-with-primary-progressive-aphasia-alzheimer-s-disease-and-healthy-controls-a-preliminary-study
#10
Hung-Chou Kuo, Ing-Tsung Hsiao, Chia-Ju Hsieh, Chu-Yun Huang, Kuo-Lun Huang, Yau-Yau Wai, Wen-Li Chuang, Mei-Ping Kung, Yi-Chuan Chu, Tzu-Chen Yen, Kun-Ju Lin, Chin-Chang Huang
BACKGROUND: To determine whether dual-phase (18)F-florbetapir positron emission tomography imaging with perfusion-like and amyloid deposition information can distinguish among primary progressive aphasia (PPA), Alzheimer's disease (AD), and healthy controls (HCs). METHODS: Patients diagnosed with PPA, including four semantic dementia (SD) and two progressive nonfluent aphasia (PNFA), as well as one logopenic variant (LV) of PPA, were studied. All PPA patients, and age-/sex-matched patients with probable AD (n=8) and HCs (n=8) were subjected to dual-phase (18)F-florbetapir imaging...
April 20, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28402949/revisit-18f-fluorodeoxyglucose-oncology-positron-emission-tomography-systems-molecular-imaging-of-glucose-metabolism
#11
REVIEW
Baozhong Shen, Tao Huang, Yingying Sun, Zhongnan Jin, Xiao-Feng Li
18F-fluorodeoxyglucose (18F-FDG) positron emission tomography has become an important tool for detection, staging and management of many types of cancer. Oncology application of 18F-FDG bases on the knowledge that increase in glucose demand and utilization is a fundamental features of cancer. Pasteur effect, Warburg effect and reverse Warburg effect have been used to explain glucose metabolism in cancer. 18F-FDG accumulation in cancer is reportedly microenvironment-dependent, 18F-FDG avidly accumulates in poorly proliferating and hypoxic cancer cells, but low in well perfused (and proliferating) cancer cells...
March 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28386817/review-of-cardiovascular-imaging-in-the-journal-of-nuclear-cardiology-in-2016-part-2-of-2-myocardial-perfusion-imaging
#12
Fadi G Hage, Wael A AlJaroudi
In 2016, the Journal of Nuclear Cardiology published many high-quality articles. Similar to previous years, we will summarize here a selection of the articles that were published in the Journal in 2016 to provide a concise review of the main advancements that have recently occurred in the field. In the first article of this two-part series we focused on publications dealing with positron emission tomography, computed tomography, and magnetic resonance. This review will place emphasis on myocardial perfusion imaging using single-photon emission-computed tomography summarizing advances in the field including in diagnosis, prognosis, and appropriate use...
April 6, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28379356/decreased-glycolytic-metabolism-in-non-compaction-cardiomyopathy-by-18f-fluoro-2-deoxyglucose-positron-emission-tomography-new-insights-into-pathophysiological-mechanisms-and-clinical-implications
#13
Marcelo Dantas Tavares de Melo, Maria Clementina Pinto Giorgi, Antonildes Nascimento Assuncao, Roberto Nery Dantas, Jose de Arimateia Araujo Filho, Jose Rodrigues Parga Filho, Ana Luiza de Souza Bierrenbach, Camila Rocon de Lima, José Soares, José Claudio Meneguetti, Charles Mady, Ludhmila Abrahão Hajjar, Roberto Kalil Filho, Edimar Alcides Bocchi, Vera Maria Cury Salemi
Aims: The pathophysiological mechanisms of left ventricular non-compaction cardiomyopathy (LVNC) remain controversial. This study performed combined 18F-fluoro-2-deoxyglucose dynamic positron emission tomography (FDG-PET) and 99mTc-sestamibi single-photon emission computed tomography (SPECT) studies to evaluate myocardial glucose metabolism and perfusion in patients with LVNC and their clinical implications. Methods and results: Thirty patients (41 ± 12 years, 53% male) with LVNC, diagnosed by cardiovascular magnetic resonance (CMR) criteria, and eight age-matched healthy controls (42 ± 12 years, 50% male) were prospectively recruited to undergo FDG-PET with measurement of the myocardial glucose uptake rate (MGU) and SPECT to investigate perfusion-metabolism patterns...
March 30, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28368505/effects-of-cranioplasty-on-cerebral-blood-flow-following-decompressive-craniectomy-a-systematic-review-of-the-literature
#14
Sameer H Halani, Jason K Chu, James G Malcolm, Rima S Rindler, Jason W Allen, Jonathan A Grossberg, Gustavo Pradilla, Faiz U Ahmad
BACKGROUND: Cranioplasty after decompressive craniectomy (DC) is routinely performed for reconstructive purposes and has been recently linked to improved cerebral blood flow (CBF) and neurological function. OBJECTIVE: To systematically review all available literature to evaluate the effect of cranioplasty on CBF and neurocognitive recovery. METHODS: A PubMed, Google Scholar, and MEDLINE search adhering to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines included studies reporting patients who underwent DC and subsequent cranioplasty in whom cerebral hemodynamics were measured before and after cranioplasty...
March 29, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28360997/imaging-biomarkers-in-parkinson-s-disease-and-parkinsonian-syndromes-current-and-emerging-concepts
#15
REVIEW
Usman Saeed, Jordana Compagnone, Richard I Aviv, Antonio P Strafella, Sandra E Black, Anthony E Lang, Mario Masellis
Two centuries ago in 1817, James Parkinson provided the first medical description of Parkinson's disease, later refined by Jean-Martin Charcot in the mid-to-late 19th century to include the atypical parkinsonian variants (also termed, Parkinson-plus syndromes). Today, Parkinson's disease represents the second most common neurodegenerative disorder with an estimated global prevalence of over 10 million. Conversely, atypical parkinsonian syndromes encompass a group of relatively heterogeneous disorders that may share some clinical features with Parkinson's disease, but are uncommon distinct clinicopathological diseases...
2017: Translational Neurodegeneration
https://www.readbyqxmd.com/read/28360207/-18-f-fluoromisonidazole-kinetic-modeling-for-characterization-of-tumor-perfusion-and-hypoxia-in-response-to-antiangiogenic-therapy
#16
Milan Grkovski, Sally-Ann Emmas, Sean D Carlin
Multiparametric imaging of tumor perfusion and hypoxia with (18)F-fluoromisonidazole ((18)F-FMISO) dynamic positron emission tomography (dPET) may allow for an improved response assessment to antiangiogenic therapies. Cediranib (AZD2171) is a potent inhibitor of tyrosine kinase activity associated with vascular endothelial growth factor receptors-1, -2 and -3, currently in Phase II/III clinical trials. Serial (18)F-FMISO dPET was performed to investigate changes in tumor biomarkers of perfusion and hypoxia following cediranib treatment...
March 30, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28358340/research-progress-on-18-f-labeled-agents-for-imaging-of-myocardial-perfusion-with-positron-emission-tomography
#17
REVIEW
Tiantian Mou, Xianzhong Zhang
Coronary artery disease (CAD) is the leading cause of death in the world. Myocardial perfusion imaging (MPI) plays a significant role in non-invasive diagnosis and prognosis of CAD. However, neither single-photon emission computed tomography nor positron emission tomography clinical MPI agents can absolutely satisfy the demands of clinical practice. In the past decades, tremendous developments happened in the field of (18)F-labeled MPI tracers. This review summarizes the current state of (18)F-labeled MPI tracers, basic research data of those tracers, and the future direction of MPI tracer research...
March 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28357812/clinical-performance-of-rb-82-myocardial-perfusion-pet-and-tc-99m-based-spect-in-patients-with-extreme-obesity
#18
David T Harnett, Samir Hazra, Ronnen Maze, Brian A Mc Ardle, Ali Alenazy, Trevor Simard, Ellen Henry, Girish Dwivedi, Christopher Glover, Robert A deKemp, Ross A Davies, Terrence D Ruddy, Benjamin J W Chow, Rob S Beanlands, Benjamin Hibbert
BACKGROUND: We evaluated the performance of stress imaging with technetium-99m-labeled tetrofosmin single-photon emission computed tomography (SPECT) and rubidium-82 positron emission tomography (PET) in patients with extreme obesity, defined as body mass index ≥40 kg/m(2). METHODS: We identified patients with extreme obesity who underwent angiography in our center and either stress SPECT or PET within the previous six months. Cohorts of patients with extreme obesity and a <5% pretest likelihood of CAD who underwent SPECT (N = 25) or PET (N = 25) were also included...
March 29, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28343598/incremental-prognostic-value-of-global-longitudinal-strain-and-18f-fludeoxyglucose-positron-emission-tomography-in-patients-with-systemic-sarcoidosis
#19
Brett W Sperry, Ahmed Ibrahim, Kazuaki Negishi, Tomoko Negishi, Parag Patel, Zoran B Popović, Daniel Culver, Richard Brunken, Thomas H Marwick, Balaji Tamarappoo
In independent studies, abnormal global longitudinal strain (GLS) and myocardial inflammation or scar detected by 18F-fludeoxyglucose positron emission tomography (FDG-PET) are associated with poor prognosis among patients with high likelihood for cardiac sarcoidosis. However, commonly used imaging modalities have not been evaluated in the same population. Our goals were to examine the relation between GLS and FDG-PET, and to evaluate the incremental prognostic value of these imaging techniques for predicting major adverse cardiac events (MACE) in patients suspected to have cardiac sarcoidosis...
March 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28318875/feasibility-of-pet-for-the-management-of-coronary-artery-disease-comparison-between-cfr-and-ffr
#20
REVIEW
Osamu Manabe, Masanao Naya, Nagara Tamaki
Myocardial perfusion imaging using positron emission tomography (PET) allows both qualitative and quantitative measurement. The quantitative myocardial blood flow and coronary flow reserve (CFR) are reliable indices for evaluating functional severity, influenced by both epicardial stenosis and microvascular disease. Fractional flow reserve (FFR) also reflects physiological stenosis, which measures the pressure differences across a coronary artery stenosis during maximum hyperemia. Discordance between CFR and FFR has been noticed in estimating the functional significance of coronary stenosis...
March 16, 2017: Journal of Cardiology
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