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https://www.readbyqxmd.com/read/27921034/crowdsourcing-precision-cerebrovascular-health-imaging-and-cloud-seeding-a-million-brains-initiative%C3%A2
#1
David S Liebeskind
Crowdsourcing, an unorthodox approach in medicine, creates an unusual paradigm to study precision cerebrovascular health, eliminating the relative isolation and non-standardized nature of current imaging data infrastructure, while shifting emphasis to the astounding capacity of big data in the cloud. This perspective envisions the use of imaging data of the brain and vessels to orient and seed A Million Brains Initiative™ that may leapfrog incremental advances in stroke and rapidly provide useful data to the sizable population around the globe prone to the devastating effects of stroke and vascular substrates of dementia...
2016: Frontiers in Medicine
https://www.readbyqxmd.com/read/27920873/migratory-stroke-like-lesions-in-a-case-of-adult-onset-mitochondrial-encephalomyopathy-lactic-acidosis-and-stroke-like-episodes-melas-syndrome-and-a-review-of-imaging-findings
#2
Stephen S Cai, Rainer von Coelln, Theresa J Kouo
Imaging findings of adult-onset mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS) syndrome is poorly documented. The authors present a 48-year-old woman with subacute onset of word-finding difficulties and right arm stiffness. Magnetic resonance imaging performed 2 weeks prior revealed left temporal lobe diffusion and fluid-attenuated inversion recovery hyperintensity predominantly involving the cortex. The apparent diffusion coefficient map showed preserved signal in the temporal cortex...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920714/idarucizumab-as-antidote-to-intracerebral-hemorrhage-under-treatment-with-dabigatran
#3
Valentin Held, Philipp Eisele, Christoph C Eschenfelder, Kristina Szabo
BACKGROUND AND PURPOSE: Non-vitamin K anticoagulants (NOAC) such as dabigatran have become important therapeutic options for the prevention of stroke. Until recently, there were only nonspecific agents to reverse their anticoagulant effects in a case of emergency. Idarucizumab, an antibody fragment targeting dabigatran, is the first specific antidote for a NOAC to be approved, but real-world experience is limited. METHODS: We report two cases of patients on dabigatran with acute intracerebral hemorrhage who received idarucizumab...
September 2016: Case Reports in Neurology
https://www.readbyqxmd.com/read/27920021/venous-and-arterial-air-embolism-a-rare-phenomenon-with-fatal-consequences
#4
Jatan Shah, Nasheena Jiwa, Natasha Mamdani, David Hill
Air embolism is often an iatrogenic complication which may occur in venous or arterial circulation depending on the port of entry. We present two cases in which air embolism occurred in venous and arterial circulation after contrast medium injection (CMI) and coronary artery bypass graft (CABG) surgery, respectively. In one case, accumulation of air bubbles was observed in the pulmonary artery after CMI. This was attributed to inadvertent injection of air owing to improper connection of the injector and the catheter...
December 5, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27919794/diagnostic-utility-of-contrast-enhanced-3d-t1-weighted-imaging-in-acute-cerebral-infarction-associated-with-graves-disease
#5
Yasufumi Gon, Manabu Sakaguchi, Naoki Oyama, Hideki Mochizuki
Graves disease is rarely complicated with cerebrovascular steno-occlusive diseases. Previous studies have suggested several hypotheses for this occurrence, including excess thyroid hormone, which stimulates the sympathetic nervous system, which in turn causes an abnormal hemodynamic response with consequent atherosclerotic changes, and antithyroid antibodies cause local vascular inflammation in patients with Graves disease. However, radiological findings of vasculitis in patients with Graves disease and cerebral infarction remain less known...
December 2, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27919793/inter-rater-reliability-for-thrombolysis-in-cerebral-infarction-with-tici-2c-category
#6
Ondrej Volny, Petra Cimflova, Viktor Szeder
BACKGROUND AND PURPOSE: Thrombolysis in cerebral infarction (TICI) with 2b/3 (>50% of occluded territory/complete reperfusion) has been regarded as a successful angiographic outcome. To account for near-perfect angiographic results, the category TICI 2c (near-complete reperfusion) has been introduced. As the degree of inter-rater reliability for TICI with 2c category remains poorly studied, we strived to evaluate the agreement among stroke-treating specialists. METHODS: All consecutive patients, who underwent stent-retriever thrombectomy for acute ischemic stroke in the period between January 2014 and April 2016 at the Department of Neurointerventional Radiology, were analyzed...
December 2, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27919610/renal-artery-stenosis-in-patients-with-peripheral-artery-disease-prevalence-risk-factors-and-long-term-prognosis
#7
V Aboyans, I Desormais, J Magne, G Morange, D Mohty, P Lacroix
OBJECTIVE/BACKGROUND: The objective was to determine the prevalence and clinical determinants of renal artery stenosis (RAS) in patients undergoing digital subtraction angiography (DSA) for the assessment of peripheral artery disease (PAD), and to evaluate its prognostic significance. METHODS: All DSAs performed from January 2000 to January 2006 were retrospectively reviewed for assessment of PAD in patients naive for any prior revascularisation of lower-limb arteries...
December 2, 2016: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/27917937/vessel-wall-differences-between-middle-cerebral-artery-and-basilar-artery-plaques-on-magnetic-resonance-imaging
#8
Peng-Peng Niu, Yao Yu, Hong-Wei Zhou, Yang Liu, Yun Luo, Zhen-Ni Guo, Hang Jin, Yi Yang
A recent study showed that posterior circulation plaques have a greater capacity for positive remodeling in a non-Asian population. We aimed to investigate if the features of plaques in the middle cerebral artery (MCA) were different from those in the basilar artery (BA) in a northern Chinese population. We retrospectively analysed the records of 71 consecutive patients with acute ischemic stroke. All patients had at least one MCA or BA plaque with early or mild (<50% stenosis) atherosclerosis identified using vessel wall magnetic resonance imaging...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27917312/a-4d-ct-digital-phantom-of-an-individual-human-brain-for-perfusion-analysis
#9
Rashindra Manniesing, Christoph Brune, Bram van Ginneken, Mathias Prokop
Brain perfusion is of key importance to assess brain function. Modern CT scanners can acquire perfusion maps of the cerebral parenchyma in vivo at submillimeter resolution. These perfusion maps give insights into the hemodynamics of the cerebral parenchyma and are critical for example for treatment decisions in acute stroke. However, the relations between acquisition parameters, tissue attenuation curves, and perfusion values are still poorly understood and cannot be unraveled by studies involving humans because of ethical concerns...
2016: PeerJ
https://www.readbyqxmd.com/read/27917212/stroke-in-patients-with-diabetes-mellitus-a-study-from-north-western-nigeria
#10
Lukman Owolabi, Mansur Nagode, Aliyu Ibrahim, Andrew Uloko, Ibrahim Gezawa, Mohammad Datti
BACKGROUND: Stroke is one of the major causes of morbidity and mortality worldwide and apart from being exceedingly harmful in diabetics, stroke is a disabling disorder. The study was undertaken to describe the clinical characteristics, outcome pattern and predictors of mortality in a cohort of diabetic patients presenting with stroke in two tertiary health facilities in North Western Nigeria. METHOD: Out of all stroke patients seen from June 2007 to February 2011, persons with diabetes mellitus presenting with stroke in the emergency unit of the two tertiary hospitals in Kano were consecutively recruited for the study...
September 2016: African Health Sciences
https://www.readbyqxmd.com/read/27914791/aberrant-developmental-titin-splicing-and-dysregulated-sarcomere-length-in-thymosin-%C3%AE-4-knockout-mice
#11
Nicola Smart, Johannes Riegler, Cameron W Turtle, Craig A Lygate, Debra J McAndrew, Katja Gehmlich, Karina N Dubé, Anthony N Price, Vivek Muthurangu, Andrew M Taylor, Mark F Lythgoe, Charles Redwood, Paul R Riley
Sarcomere assembly is a highly orchestrated and dynamic process which adapts, during perinatal development, to accommodate growth of the heart. Sarcomeric components, including titin, undergo an isoform transition to adjust ventricular filling. Many sarcomeric genes have been implicated in congenital cardiomyopathies, such that understanding developmental sarcomere transitions will inform the aetiology and treatment. We sought to determine whether Thymosin β4 (Tβ4), a peptide that regulates the availability of actin monomers for polymerization in non-muscle cells, plays a role in sarcomere assembly during cardiac morphogenesis and influences adult cardiac function...
November 30, 2016: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/27913203/incidence-of-recurrent-intracerebral-hemorrhages-in-a-multiethnic-south-asian-population
#12
Liming Qiu, Trisha Upadhyaya, Angela An Qi See, Yew Poh Ng, Nicolas Kon Kam King
INTRODUCTION: Spontaneous primary intracerebral hemorrhage (ICH) accounts for approximately 25% of all strokes in Singapore. Incidence of recurrent ICH is not well studied, and previous studies have reported inconsistent findings in the rate and risk factors associated with ICH recurrences. We aimed to study the incidence of recurrent ICHs in Singapore and to identify the associated risk factors as well as pattern of ICH recurrence. METHODS: A retrospective review of all consecutive admissions for intracerebral hemorrhage at the National Neuroscience Institute between January 2006 and November 2013 was performed...
November 29, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27910074/evolutional-characterization-of-photochemically-induced-stroke-in-rats-a-multimodality-imaging-and-molecular-biological-study
#13
Nai-Wei Liu, Chien-Chih Ke, Yonghua Zhao, Yi-An Chen, Kim-Chuan Chan, David Tat-Wei Tan, Jhih-Shian Lee, You-Yin Chen, Tun-Wei Hsu, Ya-Ju Hsieh, Chi-Wei Chang, Bang-Hung Yang, Wen-Sheng Huang, Ren-Shyan Liu
Photochemically induced cerebral ischemia is an easy-manipulated, reproducible, relatively noninvasive, and lesion controllable model for translational study of ischemic stroke. In order to longitudinally investigate the characterization of the model, magnetic resonance imaging, (18)F-2-deoxy-glucose positron emission tomography, fluorescence, and bioluminescence imaging system were performed in correlation with triphenyl tetrazolium chloride (TTC), hematoxylin-eosin staining, and immunohistochemistry examinations of glial fibrillary acidic protein, CD68, NeuN, von willebrand factor, and α-smooth muscle actin in the infarct zone...
December 1, 2016: Translational Stroke Research
https://www.readbyqxmd.com/read/27909265/prevention-of-the-collapse-of-pial-collaterals-by-remote-ischemic-perconditioning-during-acute-ischemic-stroke
#14
Junqiang Ma, Yonglie Ma, Bin Dong, Mischa V Bandet, Ashfaq Shuaib, Ian R Winship
Collateral circulation is a key variable determining prognosis and response to recanalization therapy during acute ischemic stroke. Remote ischemic perconditioning (RIPerC) involves inducing peripheral ischemia (typically in the limbs) during stroke and may reduce perfusion deficits and brain damage due to cerebral ischemia. In this study, we directly investigated pial collateral flow augmentation due to RIPerC during distal middle cerebral artery occlusion (MCAo) in rats. Blood flow through pial collaterals between the anterior cerebral artery (ACA) and the MCA was assessed in male Sprague Dawley rats using in vivo laser speckle contrast imaging (LSCI) and two photon laser scanning microscopy (TPLSM) during distal MCAo...
December 1, 2016: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/27909202/prediction-of-blood-brain-barrier-disruption-and-intracerebral-hemorrhagic-infarction-using-arterial-spin-labeling-magnetic-resonance-imaging
#15
Takeya Niibo, Hajime Ohta, Shirou Miyata, Ichiro Ikushima, Kazuchika Yonenaga, Hideo Takeshima
BACKGROUND AND PURPOSE: Arterial spin-labeling magnetic resonance imaging is sensitive for detecting hyperemic lesions (HLs) in patients with acute ischemic stroke. We evaluated whether HLs could predict blood-brain barrier (BBB) disruption and hemorrhagic transformation (HT) in acute ischemic stroke patients. METHODS: In a retrospective study, arterial spin-labeling was performed within 6 hours of symptom onset before revascularization treatment in 25 patients with anterior circulation large vessel occlusion on baseline magnetic resonance angiography...
December 1, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27909201/infarct-pattern-and-collateral-status-in-adult-moyamoya-disease-a-multimodal-magnetic-resonance-imaging-study
#16
Dong Yeop Kim, Jeong Pyo Son, Je Young Yeon, Gyeong-Moon Kim, Jong-Soo Kim, Seung-Chyul Hong, Oh Young Bang
BACKGROUND AND PURPOSE: Moyamoya disease (MMD) is a unique cerebrovascular disease characterized by the progressive stenosis of large intracranial arteries and a hazy network of basal collaterals, called moyamoya vessels. Although hemodynamic studies have been applied in MMD patients, the mechanisms of stroke in MMD are still unclear. The present study evaluated the infarct pattern and collateral status using multimodal magnetic resonance imaging in MMD patients. METHODS: Adult MMD patients with acute ischemic stroke were prospectively recruited, and infarct pattern on diffusion-weighted imaging was evaluated...
December 1, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27909098/reversible-disruption-of-neuronal-mitochondria-by-ischemic-and-traumatic-injury-revealed-by-quantitative-two-photon-imaging-in-the-neocortex-of-anesthetized-mice
#17
Mikhail Kislin, Jeremy Sword, Ioulia V Fomitcheva, Deborah Croom, Evgeny Pryazhnikov, Eero Lihavainen, Dmytro Toptunov, Heikki Rauvala, Andre S Ribeiro, Leonard Khiroug, Sergei A Kirov
: Mitochondria play a variety of functional roles in cortical neurons, from metabolic support and neuroprotection to the release of cytokines that trigger apoptosis. In dendrites, mitochondrial structure is closely linked to their function, and fragmentation (fission) of the normally elongated mitochondria indicates loss of their function under such pathological conditions as stroke and brain trauma. Using in vivo two-photon microscopy in mouse brain, we quantified mitochondrial fragmentation in a full spectrum of cortical injuries ranging from severe to mild...
December 1, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27909000/distinct-contributions-of-dorsal-and-ventral-streams-to-imitation-of-tool-use-and-communicative-gestures
#18
Andrea Dressing, Kai Nitschke, Dorothee Kümmerer, Tobias Bormann, Lena Beume, Charlotte S M Schmidt, Vera M Ludwig, Irina Mader, Klaus Willmes, Michel Rijntjes, Christoph P Kaller, Cornelius Weiller, Markus Martin
Imitation of tool-use gestures (transitive; e.g., hammering) and communicative emblems (intransitive; e.g., waving goodbye) is frequently impaired after left-hemispheric lesions. We aimed 1) to identify lesions related to deficient transitive or intransitive gestures, 2) to delineate regions associated with distinct error types (e.g., hand configuration, kinematics), and 3) to compare imitation to previous data on pantomimed and actual tool use. Of note, 156 patients (64.3 ± 14.6 years; 56 female) with first-ever left-hemispheric ischemic stroke were prospectively examined 4...
November 30, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27908279/co-existing-intracranial-and-extracranial-carotid-artery-atherosclerotic-plaques-and-recurrent-stroke-risk-a-three-dimensional-multicontrast-cardiovascular-magnetic-resonance-study
#19
Yilan Xu, Chun Yuan, Zechen Zhou, Le He, Donghua Mi, Rui Li, Yuanyuan Cui, Yilong Wang, Yongjun Wang, Gaifen Liu, Zhuozhao Zheng, Xihai Zhao
BACKGROUND: As a systemic disease, atherosclerosis commonly affects intracranial and extracranial carotid arteries simultaneously which is defined as co-existing plaques. Previous studies demonstrated that co-existing atherosclerotic diseases are significantly associated with ischemic cerebrovascular events. The aim of this study was to investigate the characteristics of co-existing intracranial and extracranial carotid atherosclerotic plaques and their relationships with recurrent stroke by using 3D multi-contrast magnetic resonance (MR) vessel wall imaging...
December 2, 2016: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/27905390/-pr%C3%B0-gnosis-of-motor-function-recovery-in-ischemic-stroke-using-diffusion-tensor-mri
#20
M Yu Maksimova, T A Popova, R N Konovalov
AIM: To identify factors of motor recovery in ischemic stroke (IS) using diffusion tensor imaging (DTI). MATERIAL AND METHODS: Forty-seven patients with IS were studied within 1-2, 7-8, 14-15, 20-21 days after stroke. The fractional anisotropy (FA) values of the pyramidal tract were measured in the posterior limb of the internal capsule, cerebral peduncle and pons. Relative values of FA (rFA) ratio (rFA=FA affected side/FA unaffected side) were assessed as well...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
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