Regional Blood Flow
Mostrando 1-12 de 292 artigos, teses e dissertações.
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1. Evaluation of 10-minute post-injection 11C-PiB PET and its correlation with 18F-FDG PET in older adults who are cognitively healthy, mildly impaired, or with probable Alzheimer’s disease
Objective: Positron emission tomography (PET) allows in vivo evaluation of molecular targets in neurodegenerative diseases, such as Alzheimer’s disease. Mild cognitive impairment is an intermediate stage between normal cognition and Alzheimer-type dementia. In vivo fibrillar amyloid-beta can be detected in PET using [11C]-labeled Pittsburgh compound B (11C
Brazilian Journal of Psychiatry. Publicado em: 2022
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2. Late cardiac perconditioning by phenylephrine in an isolated rat heart model is mediated by mitochondrial potassium channels
The present study was designed to investigate the effect of early and late administration of phenylephrine during ischemia against regional ischemia-reperfusion injuries in an isolated rat heart model. All animals were randomly divided into experimental groups: (I) IR (Ischemic/ reperfusion): the hearts underwent 35 min of regional ischemia followed by 60 mi
Braz. J. Pharm. Sci.. Publicado em: 24/10/2019
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3. Support vector machine-based classification of neuroimages in Alzheimer’s disease: direct comparison of FDG-PET, rCBF-SPECT and MRI data acquired from the same individuals
Objective: To conduct the first support vector machine (SVM)-based study comparing the diagnostic accuracy of T1-weighted magnetic resonance imaging (T1-MRI), F-fluorodeoxyglucose-positron emission tomography (FDG-PET) and regional cerebral blood flow single-photon emission computed tomography (rCBF-SPECT) in Alzheimer’s disease (AD). Method: Brain T1-MR
Rev. Bras. Psiquiatr.. Publicado em: 02/10/2017
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4. Cerebral blood flow and vasoreactivity in aging: an arterial spin labeling study
Regional cerebral blood flow (CBF) and cerebrovascular reactivity (CVR) in young and elderly participants were assessed using pulsed arterial spin labeling (ASL) and blood oxygenation level-dependent (BOLD) magnetic resonance imaging (MRI) techniques in combination with inhalation of CO2. Pulsed ASL and BOLD-MRI were acquired in seventeen asymptomatic volunt
Braz J Med Biol Res. Publicado em: 23/03/2017
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5. Arterial spin labeling in patients with schizophrenia: a systematic review
Abstract Background: Neuroimaging studies are an invaluable source of information about the physiopathology of schizophrenia. Arterial spin labeling (ASL) is a new magnetic resonance technique (MRI) that is able to effectively evaluate brain function without the use of radiation. Objective: To make a systematic review of studies using ASL to compare restin
Arch. Clin. Psychiatry (São Paulo). Publicado em: 2016-12
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6. Blockade of CXCR1/2 chemokine receptors protects against brain damage in ischemic stroke in mice
OBJECTIVE: Ischemic stroke may result from transient or permanent reductions of regional cerebral blood flow. Polymorphonuclear neutrophils have been described as the earliest inflammatory cells to arrive in ischemic tissue. CXCR1/2 receptors are involved in the recruitment of these cells. However, the contribution of these chemokine receptors during transie
Clinics. Publicado em: 2013
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7. Alterações metabólicas cerebrais associadas aos fatores de risco cardiovascular: um estudo de tomografia por emissão de pósitron (PET) / Abnormalities on brain metabolism associated to cardiovascular risk factors: a positron emission tomography (PET) study
INTRODUCTION: Cardiovascular risk factors (CVRF) are known to affect cerebral blood flow, possibly contributing to cognitive decline and to the emergence of Alzheimers disease (AD), the commonest form of dementia. Positron emission tomography (PET) with 18-fluoro-2-deoxyglucose (18FFDG) has been widely used to demonstrate specific patterns of reduced brain g
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/12/2011
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8. Effects of different peep levels on mesenteric leukocyte-endothelial interactions in rats during mechanical ventilation
INTRODUCTION: Mechanical ventilation with positive end expiratory pressure (PEEP) improves oxygenation and treats acute pulmonary failure. However, increased intrathoracic pressure may cause regional blood flow alterations that may contribute to mesenteric ischemia and gastrointestinal failure. We investigated the effects of different PEEP levels on mesenter
Clinics. Publicado em: 2009-05
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9. Acurácia da ecocardiografia com estudo da perfusão miocárdica na avaliação de viabilidade em pacientes com disfunção ventricular esquerda crônica submetidos à revascularização / Real-time perfusion echocardiography accuracy for detecting viability in chronic left ventricular dysfunction undergoing myocardial revascularization
BACKGROUND: Real-time perfusion echocardiography (RTPE) is an emerging modality for assessing myocardial perfusion and allows noninvasive quantification of regional myocardial blood flow. Little is known about the accuracy of the RTPE for the assessment of myocardial viability and the possibility of prediction of quality of life improvement after myocardial
Publicado em: 2009
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10. The role of adenosine as blood flow regulator in SHR: fisical exercise effect / O papel da adenosina como reguladora do fluxo sanguíneo em ratos espontaneamente hipertensos jovens e adultos: efeitos do treinamento físico
INTRODUÇÃO: Exercícios físicos são utilizados como terapia nãofarmacológica para o tratamento da hipertensão arterial e o treinamento físico (TF) por natação é reconhecido por produzir remodelamento cardíaco em animais experimentais. Entretanto, a ação vasodilatadora da adenosina (ado) resultante do exercício físico como prevenção e tratam
Publicado em: 2009
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11. Diagnosis of regional cerebral blood flow abnormalities using SPECT: agreement between individualized statistical parametric maps and visual inspection by nuclear medicine physicians with different levels of expertise in nuclear neurology
INTRODUCTION: Visual analysis is widely used to interpret regional cerebral blood flow (rCBF) SPECT images in clinical practice despite its limitations. Automated methods are employed to investigate between-group rCBF differences in research studies but have rarely been explored in individual analyses. OBJECTIVES: To compare visual inspection by nuclear phys
Clinics. Publicado em: 2009
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12. Disfunção renal e síndrome de baixo débito cardíaco / Renal dysfunction and low cardiac output syndrome
Background: The low cardiac output syndrome (LCOS) is a serious and complex stage in the pathophysiology of heart failure. Regional blood flow alters depending on different organs and systems, with special impact on the kidney. Acute renal failure is common in patients with LOCS, and it is an independent predictor of increased morbidity and mortality. Object
Publicado em: 2008