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cerebrovascular reserve

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https://www.readbyqxmd.com/read/28317428/fractional-flow-reserve-guided-multivessel-angioplasty-in-myocardial-infarction
#1
Pieter C Smits, Mohamed Abdel-Wahab, Franz-Josef Neumann, Bianca M Boxma-de Klerk, Ketil Lunde, Carl E Schotborgh, Zsolt Piroth, David Horak, Adrian Wlodarczak, Paul J Ong, Rainer Hambrecht, Oskar Angerås, Gert Richardt, Elmir Omerovic
Background In patients with ST-segment elevation myocardial infarction (STEMI), the use of percutaneous coronary intervention (PCI) to restore blood flow in an infarct-related coronary artery improves outcomes. The use of PCI in non-infarct-related coronary arteries remains controversial. Methods We randomly assigned 885 patients with STEMI and multivessel disease who had undergone primary PCI of an infarct-related coronary artery in a 1:2 ratio to undergo complete revascularization of non-infarct-related coronary arteries guided by fractional flow reserve (FFR) (295 patients) or to undergo no revascularization of non-infarct-related coronary arteries (590 patients)...
March 18, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28283374/outcomes-after-a-left-anterior-descending-artery-endarterectomy-in-advanced-coronary-artery-disease
#2
Charalampos Katselis, George Samanidis, Anastasia Papasotiriou, George Karatasakis, Ioannis Nenekidis, Eftichia Demerouti, Theofani Antoniou, Konstantinos Perreas
BACKGROUND: Coronary endarterectomy albeit infrequently utilized remains a pivotal treatment modality for advanced atherosclerotic heart disease. Benefits of coronary endarterectomy are explored in terms of better mid-term survival, freedom of major adverse cardiac and cerebrovascular events and improved left ventricular ejection fraction. METHODS: 50 patients with coronary artery disease including extensive diffuse LAD disease underwent a left anterior descending artery endarterectomy with coronary by-pass grafting and left internal mammary artery as conduit between 2006 and 2014...
February 21, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28224671/outcomes-after-diagnosis-of-mild-cognitive-impairment-in-a-large-autopsy-series
#3
Erin L Abner, Richard J Kryscio, Frederick A Schmitt, David W Fardo, Daniela C Moga, Eseosa T Ighodaro, Gregory A Jicha, Lei Yu, Hiroko H Dodge, Chengjie Xiong, Randall L Woltjer, Julie A Schneider, Nigel J Cairns, David A Bennett, Peter T Nelson
OBJECTIVE: To determine clinical and neuropathological outcomes following a clinical diagnosis of mild cognitive impairment (MCI). METHODS: Data were drawn from a large autopsy series (N = 1,337) of individuals followed longitudinally from normal or MCI status to death, derived from 4 Alzheimer Disease (AD) Centers in the United States. RESULTS: Mean follow-up was 7.9 years. Of the 874 individuals ever diagnosed with MCI, final clinical diagnoses were varied: 39...
February 22, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28207204/concise-review-increasing-the-validity-of-cerebrovascular-disease-models-and-experimental-methods-for-translational-stem-cell-research
#4
Johannes Boltze, Franziska Nitzsche, Jukka Jolkkonen, Gesa Weise, Claudia Pösel, Björn Nitzsche, Daniel-Christoph Wagner
Interspecies differences, anatomical and physiological aspects as wells as simplified study designs contribute to an overestimation of treatment effects and limit the transferability of experimental results into clinical applications. Confounders of cell therapies for cerebrovascular disorders (CVD) include common CVD comorbidities, frequent medications potentially affecting endogenous and transplanted stem cells, as well as age- and immune-system-related effects. All of those can contribute to a substantial modelling bias, ultimately limiting the prospective quality of preclinical research programs regarding the clinical value of a particular cell therapy...
February 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/28185318/cognitive-function-after-heart-transplantation-comparing-everolimus-based-and-calcineurin-inhibitor-based-regimens
#5
Britta S Bürker, Lars Gullestad, Einar Gude, Anne R Authen, Ingelin Grov, Per K Hol, Arne K Andreassen, Satish Arora, Mary Amanda Dew, Arnt E Fiane, Ira R H Haraldsen, Ulrik F Malt, Stein Andersson
BACKGROUND: Studies have shown conflicting results concerning the occurrence of cognitive impairment after successful heart transplantation (HTx). Another unresolved issue is the possible differential impact of immunosuppressants on cognitive function. In this study, we describe cognitive function in a cohort of HTx recipients and subsequently compare cognitive function between subjects on either everolimus- or calcineurin inhibitor (CNI)-based immunosuppression. METHODS: Cognitive function, covering attention, processing speed, executive functions, memory, and language functions, was assessed with a neuropsychological test battery...
February 10, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28152241/invalidation-of-fmri-experiments-secondary-to-neurovascular-uncoupling-in-patients-with-cerebrovascular-disease
#6
Andrea E Para, Kevin Sam, Julien Poublanc, Joseph A Fisher, Adrian P Crawley, David J Mikulis
PURPOSE: Blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI) is a technique used to infer neuronal activity from the observed changes in blood flow. Cerebrovascular reactivity (CVR) is the ability of arterioles to increase blood flow in response to vasodilatory stimulus. We hypothesize that in areas of disease where there is exhausted vascular reserve and impaired CVR there will be diminished blood flow response following neuronal activation, and that these areas would appear as false-negative tests on BOLD fMRI...
February 2, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28138982/relationship-between-low-bone-mineral-density-and-fractures-with-incident-cardiovascular-disease-a-systematic-review-and-meta-analysis
#7
Nicola Veronese, Brendon Stubbs, Gaetano Crepaldi, Marco Solmi, Cyrus Cooper, Nicolas Cw Harvey, Jean-Yves Reginster, Renè Rizzoli, Roberto Civitelli, Patricia Schofield, Stefania Maggi, Sarah E Lamb
An increasing evidence base suggests that low bone mineral density (BMD) and fractures are associated with cardiovascular disease (CVD). We conducted a systematic review and meta-analysis summarizing the evidence of low BMD and fractures as risk factors for future CVD. Two independent authors searched major databases from inception to August 1, 2016, for longitudinal studies reporting data on CVD incidence (overall and specific CVD) and BMD status and fractures. The association between low BMD, fractures, and CVD across longitudinal studies was explored by calculating pooled adjusted hazard ratios (HRs) ±95% confidence intervals (CIs) with a random-effects meta-analysis...
January 31, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28131187/improvement-of-neurovascular-function-and-cognitive-impairment-after-sta-mca-anastomosis
#8
Mami Ishikawa, Gen Kusaka, Satoshi Terao, Mutsumi Nagai, Yuichi Tanaka, Heiji Naritaka
OBJECTIVE: In patients with severe steno-occlusive disease of a main cerebral artery, decreased cerebrovascular reserve (CVR) and cognitive impairment without causative focal lesions on magnetic resonance imaging have been reported. We examined ipsilateral and contralateral CVR and cognition before and after superficial temporal artery-middle cerebral artery (MCA) anastomosis operation in patients with internal carotid artery (ICA) or MCA occlusion. METHODS: In 30 patients with ICA or MCA occlusion, cognitive impairment, and decreased CVR, we examined cognition, CVR, leukoaraiosis grades, and blood data...
February 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28118527/from-childhood-to-adulthood-the-trajectory-of-damage-in-patients-with-childhood-onset-systemic-lupus-erythematosus
#9
Lily Sh Lim, Eleanor Pullenayegum, Lillian Lim, Dafna Gladman, Brian Feldman, Earl Silverman
Objectives 1) To determine the longitudinal damage trajectory of patients with childhood-onset SLE (cSLE). 2) To identify baseline and disease course predictors of damage trajectory. Methods This is a retrospective inception cohort. Longitudinal pediatric-age data was obtained from a cSLE research database while adult-age data was obtained from either a research database or patients' charts. Baseline factors were tested as predictors. Time-varying factors were lagged 6 to 24 months before a visit for testing their predictive effects...
January 24, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28067615/intracranial-atherosclerosis-from-anatomy-to-pathophysiology
#10
Yuehua Pu, Linfang Lan, Xinyi Leng, Lawrence Ks Wong, Liping Liu
Background Intracranial atherosclerotic stenosis is an important etiology subtype of ischemic stroke. Stenosis severity was thought to be the main reference index for clinical treatment and research. However, stenosis could not reflect the ischemia risk completely, instead the hemodynamic state across the lesion, the extent of collateral circulation, and perfusion impairment downstream the stenosis are more important. Aims We write this review aimed to summarize novel angiographic methods applied in the evaluation of functional severity of ICAS, and commented on their limitations and prospects in future research...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28036103/elevated-tumour-necrosis-factor-alpha-was-associated-with-intima-thickening-in-obese-children
#11
Luo Bo, Yang Yi-Can, Zhou Qing, Wu Xiao-Hui, Huang Ke, Zou Chao-Chun
AIM: This study investigated the relationship between intima-media thickness (IMT) and immune parameters in obese children from five to 16 years of age. METHODS: We enrolled 185 obese children with a mean age of 10.65 ± 2.10 years and 211 controls with a mean age of 10.32 ± 1.81 years. Glycometabolism, lipid metabolism, sex hormones, immune indices and carotid IMT were measured. RESULTS: Serum interleukin (IL)-6, IL-10, tumour necrosis factor (TNF)-alpha, white blood cells and common and internal carotid artery IMTs in the obese group were higher than those in the control group (p < 0...
December 30, 2016: Acta Paediatrica
https://www.readbyqxmd.com/read/28029745/early-mortality-in-a-multinational-systemic-sclerosis-inception-cohort
#12
Yanjie Hao, Marie Hudson, Murray Baron, Patricia Carreira, Wendy Stevens, Candice Rabusa, Solene Tatibouet, Loreto Carmona, Beatriz E Joven, Molla Huq, Susanna Proudman, Mandana Nikpour
OBJECTIVE: To determine mortality and causes of death in a multinational inception systemic sclerosis (SSc) cohort. METHODS: We quantified mortality as Standardized Mortality Ratio (SMR), Years of Life Lost (YLL) and percentage mortality in the first decade of disease. The inception cohort was comprised of patients recruited within 4 years of disease onset. For comparison, we used a prevalent cohort, which included all patients irrespective of disease duration at recruitment...
December 28, 2016: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28029271/hemodynamic-mechanisms-underlying-elevated-oxygen-extraction-fraction-oef-in-moyamoya-and-sickle-cell-anemia-patients
#13
Jennifer M Watchmaker, Meher R Juttukonda, Larry T Davis, Allison O Scott, Carlos C Faraco, Melissa C Gindville, Lori C Jordan, Petrice M Cogswell, Angela L Jefferson, Howard S Kirshner, Manus J Donahue
Moyamoya is a bilateral, complex cerebrovascular condition characterized by progressive non-atherosclerotic intracranial stenosis and collateral vessel formation. Moyamoya treatment focuses on restoring cerebral blood flow (CBF) through surgical revascularization, however stratifying patients for revascularization requires abilities to quantify how well parenchyma is compensating for arterial steno-occlusion. Globally elevated oxygen extraction fraction (OEF) secondary to CBF reduction may serve as a biomarker for tissue health in moyamoya patients, as suggested in patients with sickle cell anemia (SCA) and reduced oxygen carrying capacity...
January 1, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27987381/hypoxia-ischemia-activate-processing-of-amyloid-precursor-protein-impact-of-vascular-dysfunction-in-the-pathogenesis-of-alzheimer-s-disease
#14
REVIEW
Antero Salminen, Anu Kauppinen, Kai Kaarniranta
Alzheimer's disease (AD) is associated with deficiencies in cerebrovascular functions, e.g. reduced cerebral blood flow and capillary amyloid angiopathy, both of which are evident during the early phase of AD, thus local hypoxia/ischemia could augment the pathogenesis of AD. There is abundant literature revealing that exposures to hypoxia/ischemia increase the amyloidogenic processing of amyloid-β precursor protein (APP) leading to the accumulation of amyloid-β peptides in brain. This hypoxia-induced response has been attributed to a significant increase in the activities of β- and γ-secretases, whereas α-secretase activity decreases in hypoxia...
December 17, 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/27960039/physiologic-and-pathophysiologic-roles-of-interaction-between-c-type-lectin-like-receptor-2-and-podoplanin-partners-from-in-utero-to-adulthood
#15
REVIEW
K Suzuki-Inoue, M Osada, Y Ozaki
A platelet activation receptor, C-type lectin-like receptor 2 (CLEC-2), has been identified as a receptor for a platelet-activating snake venom, rhodocytin. CLEC-2 protein is highly expressed in platelets/megakaryocytes, and at lower levels in liver Kupffer cells. Recently, podoplanin has been revealed as an endogenous ligand for CLEC-2. Podoplanin is expressed in certain types of tumor cells, fibroblastic reticular cells (FRCs) in lymph nodes, kidney podocytes, and lymphatic endothelial cells, but not in vascular endothelial cells...
February 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/27939758/assessment-of-hemodynamic-compromise-using-computed-tomography-perfusion-in-combination-with-123-i-imp-single-photon-emission-computed-tomography-without-acetazolamide-challenge-test
#16
Atsumu Hashimoto, Takeshi Mikami, Katsuya Komatsu, Shouhei Noshiro, Tohru Hirano, Masahiko Wanibuchi, Nobuhiro Mikuni
OBJECTIVES: The acetazolamide challenge test in conjunction with (123)I-IMP single-photon emission computed tomography (SPECT) is a known method of assessing cerebrovascular reserve capacity. In this study, we investigated whether CT perfusion in combination with resting state (123)I-IMP SPECT could be used instead of the acetazolamide challenge test to evaluate hemodynamic compromise in patients with atherosclerotic occlusive disease. METHODS: Twenty consecutive patients with unilateral internal carotid artery or middle cerebral artery steno-occlusive disease were enrolled...
December 6, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27935890/-surgical-prevention-of-ischaemic-strokes-by-means-of-an-extraintracranial-microanastomosis-eicma-in-the-carotid-basin
#17
V V Krylov, V A Luk'yanchikov, A S Tokarev, O Yu Nakhabin, N A Polunina, I V Sen'ko, V A Dalibaldyan, E V Grigor'eva, N E Kudryashova, G K Guseinova, E V Udodov, T A Fedulova
BACKGROUND: Not less than 50% of all ischaemic strokes appear to occur resulting from pathology of extracranial arteries. Occlusions and stenoses are more commonly encountered in carotid arteries, with the incidence of occlusion of the internal carotid artery (ICA) ranging from 5 to 10% within the structure of all lesions of brachiocephalic arteries (BCA). AIM: The study was aimed at assessing the results of a surgical procedure of extra-intracranial microanastomosis (EICMA) performed in patients presenting with occlusive and stenotic lesions of BCA at the Neurosurgical Department...
2016: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/27935213/uhplc-q-tof-ms-based-metabolomics-approach-to-compare-the-saponin-compositions-of-xueshuantong-injection-and-xuesaitong-injection
#18
Changliang Yao, Wenzhi Yang, Jingxian Zhang, Shi Qiu, Ming Chen, Xiaojian Shi, Huiqin Pan, Wanying Wu, Dean Guo
Various traditional Chinese medicine preparations developed from Notoginseng total saponins, including Xueshuantong injection and Xuesaitong injection, are extensively used in China to treat cardiocerebrovascular diseases. However, the difference of their saponin compositions remains unknown. An ultra high performance liquid chromatography with quadrupole time-of-flight mass spectrometry based metabolomics approach was developed to probe the saponin discrimination between Xueshuantong and Xuesaitong and the related factors by large sample analysis...
December 9, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27932871/efficacy-and-safety-outcomes-of-fractional-flow-reserve-in-guiding-clinical-therapy-of-non-st-segment-elevation-myocardial-infarction-compared-with-angiography-alone-in-elderly-chinese-patients
#19
RANDOMIZED CONTROLLED TRIAL
Zhao Zhang, Ke Li, Jinwen Tian
OBJECTIVE: Fractional flow reserve (FFR) is an innovative method for evaluating the physiological significance of a coronary stenosis, but its validity is less certain in patients with non-ST-segment elevation myocardial infarction (NSTEMI). It is important to assess whether FFR is effective and safe in patients, especially elderly Chinese patients, with NSTEMI. As the first one in China, the purpose of this study was to establish the efficacy and safety outcomes of FFR in guiding clinical therapy of NSTEMI compared with angiography alone in elderly Chinese patients...
2016: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/27928470/co2bold-assessment-of-moyamoya-syndrome-validation-with-single-photon-emission-computed-tomography-and-positron-emission-tomography-imaging
#20
Alain Pellaton, Philippe Bijlenga, Laurie Bouchez, Victor Cuvinciuc, Isabelle Barnaure, Valentina Garibotto, Karl-Olof Lövblad, Sven Haller
AIM: To compare the assessment of cerebrovascular reserve (CVR) using CO2BOLD magnetic resonance imaging (MRI) vs positron emission tomography (PET) and single photon emission computed tomography (SPECT) as reference standard. METHODS: Ten consecutive patients (8 women, mean age of 41 ± 26 years) with moyamoya syndrome underwent 14 pre-surgical evaluations for external-internal carotid artery bypass surgery. CVR was assessed using CO2BOLD and PET (4)/SPECT (11) with a maximum interval of 36 d, and evaluated by two experienced neuroradiologists...
November 28, 2016: World Journal of Radiology
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