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https://www.readbyqxmd.com/read/28433970/simultaneous-transient-global-amnesia-and-right-mca-stroke-after-valsalva-manoeuvre
#1
Ariel Fernando Mariaca, Jose Manuel Valdueza, Christian Gaebel, Manuel Gomez-Choco
A 61-year-old man suffered an episode of transient confusion and anterograde amnesia after a Valsalva-related manoeuvre. The MRI diffusion weighted imaging (DWI) sequences showed a left hippocampal and two right parietal lesions that were deemed as acute. The MR angiography disclosed a high-grade stenosis in the right middle cerebral artery as was described by a transcranial colour-coded ultrasound as well. Ultrasound investigation of the jugular veins showed a right jugular venous reflux after a Valsalva manoeuvre...
April 22, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28433850/surgical-resection-and-histopathological-analysis-of-a-thrombosed-giant-fusiform-mca-aneurysm-after-initial-treatment-with-a-flow-diversion-construct
#2
Jayson Sack, Vincent Cheung, Deirdre Amaro, Arvin R Wali, David R Santiago-Dieppa, J Scott Pannell, Alexander A Khalessi
BACKGROUND: We describe the histopathology of an un-ruptured, giant calcified left MCA fusiform aneurysm initially treated with endovascular flow diversion. The flow diversion construct underwent post-operative in-stent thrombosis, necessitating surgical resection of the aneurysm to eliminate mass effect. METHODS: A 75-year-old woman with a known left MCA aneurysm presented to the Emergency Department with moderate right hemibody weakness. Due to the clinical and radiographic progression of the aneurysm, the patient was offered treatment...
April 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28432954/fully-automatic-left-ventricular-segmentation-from-long-axis-cardiac-cine-mr-scans
#3
Rahil Shahzad, Qian Tao, Oleh Dzyubachyk, Marius Staring, Boudewijn P F Lelieveldt, Rob J van der Geest
With an increasing number of large-scale population-based cardiac magnetic resonance (CMR) imaging studies being conducted nowadays, there comes the mammoth task of image annotation and image analysis. Such population-based studies would greatly benefit from automated pipelines, with an efficient CMR image analysis workflow. The purpose of this work is to investigate the feasibility of using a fully-automatic pipeline to segment the left ventricular endocardium and epicardium simultaneously on two orthogonal (vertical and horizontal) long-axis cardiac cine MRI scans...
April 13, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28432758/specificity-and-sensitivity-of-magnetic-resonance-imaging-findings-in-the-diagnosis-of-progressive-supranuclear-palsy
#4
REVIEW
Stephen Bacchi, Ivana Chim, Sandy Patel
Progressive supranuclear palsy (PSP) is a neurodegenerative condition that can only be diagnosed conclusively on pathological examination. Currently, the diagnosis is based upon the National Institute of Neurological Disorders and Stroke and the Society for PSP criteria. These criteria consist of purely clinical findings. Elements of brain MRI that are being investigated for this role include identifying structural features on conventional MRI, volume changes, signal abnormalities and diffusion changes. The aim of this study is to conduct a systematic search to identify which MRI findings have evidence to support their sensitivity/specificity/accuracy in the diagnosis of PSP...
April 22, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28432519/carotid-plaque-with-expansive-arterial-remodeling-is-a-risk-factor-for-ischemic-complication-following-carotid-artery-stenting
#5
Daina Kashiwazaki, Naoya Kuwayama, Naoki Akioka, Kyo Noguchi, Satoshi Kuroda
BACKGROUND: Carotid artery stenting (CAS) is associated with a higher risk of periprocedural stroke than carotid endarterectomy. For better patient selection, more accurate risk factors should be identified. The aim of this study was to determine whether expansive arterial remodeling can predict ischemic complications in patients undergoing CAS. METHODS: This retrospective study included 82 patients with carotid stenosis treated by CAS. The plaque component was evaluated using MR plaque imaging before the procedure...
April 21, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28432385/bioresorbable-vascular-scaffolds-in-coronary-chronic-total-occlusions-revascularization-safety-assessment-related-to-struts-coverage-and-apposition-in-6-month-oct-follow-up
#6
Rosa Alba Abellas-Sequeiros, Raymundo Ocaranza-Sanchez, Ramiro Trillo-Nouche, Carlos Gonzalez-Juanatey, Jose Ramon Gonzalez-Juanatey
Beneficial properties of bioresorbable vascular scaffolds (BVS) regarding to vasomotility restoration and no caging of the vessel make them attractive devices in chronic total occlusions (CTO) revascularization. However, more evidence is needed attending to their use in this specific setting. We aim to determine feasibility and safety of BVS use in CTO revascularization attending to struts coverage and apposition, as well as re-stenosis and stent thrombosis (ST) rates. 29 BVS were deployed in 9 CTO lesions revascularization (mean J-CTO score ≥3) with an acute procedural success rate of 100%...
April 21, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28432264/prediction-of-stroke-subtype-and-recanalization-using-susceptibility-vessel-sign-on-susceptibility-weighted-magnetic-resonance-imaging
#7
Dong-Wan Kang, Han-Gil Jeong, Do Yeon Kim, Wookjin Yang, Seung-Hoon Lee
BACKGROUND AND PURPOSE: The susceptibility vessel sign (SVS) is a hypointense signal visualized because of the susceptibility effect of thrombi, sensitively detected on susceptibility-weighted magnetic resonance imaging. The relationship of SVS parameters with the stroke subtype and recanalization status after endovascular treatment remains uncertain. METHODS: The data from 89 patients with acute stroke caused by anterior circulation infarcts who underwent susceptibility-weighted magnetic resonance imaging before endovascular treatment were examined...
April 21, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28432262/quantitative-imaging-of-cerebral-thromboemboli-in-vivo-the-effects-of-tissue-type-plasminogen-activator
#8
Dong-Eog Kim, Jeong-Yeon Kim, Dawid Schellingerhout, Ju Hee Ryu, Su-Kyoung Lee, Sangmin Jeon, Ji Sung Lee, Jiwon Kim, Hee Jeong Jang, Jung E Park, Eo Jin Kim, Ick Chan Kwon, Cheol-Hee Ahn, Matthias Nahrendorf, Kwangmeyung Kim
BACKGROUND AND PURPOSE: Quantitative imaging for the noninvasive assessment of thrombolysis is needed to advance basic and clinical thrombosis-related research and tailor tissue-type plasminogen activator (tPA) treatment for stroke patients. We quantified the evolution of cerebral thromboemboli using fibrin-targeted glycol chitosan-coated gold nanoparticles and microcomputed tomography, with/without tPA therapy. METHODS: We injected thrombi into the distal internal carotid artery in mice (n=50)...
April 21, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28432103/morphology-and-cardiac-physiology-are-differentially-affected-by-temperature-in-developing-larvae-of-the-marine-fish-mahi-mahi-coryphaena-hippurus
#9
Prescilla Perrichon, Christina Pasparakis, Edward M Mager, John D Stieglitz, Daniel D Benetti, Martin Grosell, Warren W Burggren
Cardiovascular performance is altered by temperature in larval fishes, but how acute vs. chronic temperature exposures independently affect cardiac morphology and physiology in the growing larva is poorly understood. Consequently, the influence of water temperature on cardiac plasticity was investigated in developing mahi-mahi. Morphological (e.g. standard length, heart angle) and physiological cardiac variables (e.g. heart rate fH, stroke volume, cardiac output) were recorded under two conditions by imaging: i) under acute temperature exposure where embryos were reared at 25°C up to 128 hours post-fertilization (hpf) and then acutely exposed to 25° (rearing temperature), 27° and 30°C; ii) at two rearing (chronic) temperatures of 26° and 30°C and performed at 32 and 56 hpf...
April 21, 2017: Biology Open
https://www.readbyqxmd.com/read/28431956/bilateral-cerebral-embolism-as-a-characteristic-feature-of-patients-with-trousseau-syndrome
#10
Takeru Umemra, Junkoh Yamamoto, Daisuke Akiba, Shigeru Nishizawa
Trousseau syndrome is defined as a variant of intravascular thromboembolism that is induced by cancer. It may manifest itself as cerebral embolisms in some cases; however, when the cancer is not diagnosed, this identification may be difficult. Therefore, cerebral embolisms are often treated without identifying the cancer, which can worsen a patient's condition. The purpose of this study was to determine the differences in clinical features between cerebral embolisms induced by cancer (Trousseau syndrome) and those that are due to other causes, such as cardiogenic embolisms and artery-to-artery stroke...
April 18, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28431954/isolated-intracranial-fibromuscular-dysplasia-of-the-posterior-cerebral-artery
#11
Min-Ju Yeo, Ho-Yeong Jeon, Min-Ju Cha, Hye-Yeon Jang, Sang-Gil Lee, Ji Seon Kim, Sung-Hyun Lee, Sang-Soo Lee, Dong-Ick Shin
Fibromuscular dysplasia (FMD) is a nonatherosclerotic, noninflammatory arterial disease that most commonly affects the renal and internal carotid arteries, but intracranial FMD is very rare. We report a patient with FMD involving the posterior cerebral arteries (PCAs). A 24year old female was presented with a 4day history of right homonymous hemianopsia with throbbing headache in the left temporo-occipital area. The brain magnetic resonance imaging (MRI) revealed an acute ischemic stroke in the left PCA territory, while the Time of Flight (TOF) magnetic resonance angiogram (MRA) showed segmental luminal irregularities in the left proximal PCA...
April 18, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28431835/variability-in-the-use-of-neuroimaging-techniques-for-diagnosis-and-follow-up-of-stroke-patients
#12
C Valcárcel-Nazco, D Alonso-Modino, F Montón-Álvarez, R Sabatel-Hernández, M S Pastor-Santoveña, P Mesa-Blanco, J C López-Fernández, P Serrano-Aguilar
INTRODUCTION AND OBJECTIVE: Imaging diagnosis is essential for treatment planning in stroke patients. However, use of these techniques varies due to uncertainty about their effectiveness. Our purpose was to describe the use of CT and MRI in stroke and transient ischaemic attack (TIA) over 5years in hospitals belonging to the Canary Islands Health Service and analyse interhospital variability based on routinely collected administrative data. PATIENTS AND METHOD: We gathered the minimum basic dataset (MBDS) from patients diagnosed with stroke or TIA between 2005 and 2010 in 4hospitals...
April 18, 2017: Neurología: Publicación Oficial de la Sociedad Española de Neurología
https://www.readbyqxmd.com/read/28431614/permeability-surface-area-product-analysis-in-malignant-brain-edema-prediction-a-pilot-study
#13
O Volny, P Cimflova, T-Y Lee, B K Menon, C D d'Esterre
BACKGROUND AND PURPOSE: Using an extended CT perfusion acquisition (150s), we sought to determine the association between perfusion parameters and malignant edema after ischemic stroke. METHODS: Patients (from prospective study PROVE-IT, NCT02184936) with terminal internal carotid artery±proximal middle cerebral occlusion were involved. CTA was assessed for clot location and status of leptomeningeal collaterals. The following CTP parameters were calculated within the ischemic territory and contralaterally: permeability surface area product (PS), cerebral blood flow (CBF) and cerebral blood volume (CBV)...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28431590/delays-in-door-to-needle-time-for-acute-ischemic-stroke-in-the-emergency-department-a-comprehensive-stroke-center-experience
#14
Ashkan Mowla, Jordan Doyle, Navdeep S Lail, Hamidreza Rajabzadeh-Oghaz, Christopher Deline, Peyman Shirani, Marilou Ching, Annemarie Crumlish, Deborah A Steck, David Janicke, Elad I Levy, Robert N Sawyer
BACKGROUND: Current American Stroke Association guidelines recommend initiating intravenous thrombolysis (IVT) for acute ischemic stroke (AIS) within 60min of patient arrival, given the benefits of IVT for AIS are time dependent. This study aimed to identify the delaying factors in door-to-needle time (DTN) in the emergency department of one of the largest comprehensive stroke centers in New York State. We also recommended measures to reduce the delays. METHODS: We retrospectively reviewed the medical charts of all AIS patients who received IVT in our emergency department patients between April 1, 2012 and December 31, 2015 to identify those with a DTN time of >60min...
May 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28430974/using-transcranial-magnetic-stimulation-of-the-undamaged-brain-to-identify-lesion-sites-that-predict-language-outcome-after-stroke
#15
Diego L Lorca-Puls, Andrea Gajardo-Vidal, Mohamed L Seghier, Alexander P Leff, Varun Sethi, Susan Prejawa, Thomas M H Hope, Joseph T Devlin, Cathy J Price
Transcranial magnetic stimulation focused on either the left anterior supramarginal gyrus or opercular part of the left inferior frontal gyrus has been reported to transiently impair the ability to perform phonological more than semantic tasks. Here we tested whether phonological processing abilities were also impaired following lesions to these regions in right-handed, English speaking adults, who were investigated at least 1 year after a left-hemisphere stroke. When our regions of interest were limited to 0...
April 18, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28430885/lesion-mapping-of-stroke-related-erectile-dysfunction
#16
Klemens Winder, Frank Seifert, Martin Köhrmann, Carl Crodel, Stephan Kloska, Arnd Dörfler, Katharina M Hösl, Stefan Schwab, Max J Hilz
Acute ischaemic stroke in brain areas contributing to male sexual function may impair erectile function depending on the lesion site. This study intended to determine associations between stroke-related erectile dysfunction and cerebral ischaemic lesion sites using voxel-based lesion mapping. In 52 males (mean age 60.5 ± 10.5 years) with first-ever ischaemic strokes, we assessed erectile function after and retrospectively 3 months prior to the stroke using scores of the 5-item International Index of Erectile Function-5 questionnaire...
April 18, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28427984/effect-of-baseline-characteristics-on-the-outcome-of-stent-retriever-based-thrombectomy-in-acute-basilar-artery-occlusions-a-single-center-experience-and-pooled-data-analysis
#17
Wan-Ling Wen, Zi-Fu Li, Yong-Wei Zhang, Peng-Fei Yang, Keith Simfukwe, Yi-Bin Fang, Tian-Yi Zhang, Ben-Qiang Deng, Bo Hong, Jian-Min Liu, Qing-Hai Huang
OBJECTIVES: -To explore the association of baseline characteristics and the outcome of acute basilar artery occlusion (BAO) patients following stent retriever based thrombectomy (SRT). METHODS: -Clinical and imaging information of consecutive SRT treated BAO patients from a comprehensive stroke center and up-to-date literatures were reviewed respectively. The impact of baseline variables towards favorable outcome was evaluated using subgroup analysis and odds ratio extracted from published data resource together with single center records using pooled analysis...
April 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28427600/carotid-artery-stenting-investigation-of-plaque-protrusion-incidence-and-prognosis
#18
Masashi Kotsugi, Katsutoshi Takayama, Kaoru Myouchin, Takeshi Wada, Ichiro Nakagawa, Hiroyuki Nakagawa, Toshiaki Taoka, Shinichiro Kurokawa, Hiroyuki Nakase, Kimihiko Kichikawa
OBJECTIVES: This study sought to clarify the incidence and prognosis of PP in carotid artery stenting (CAS). BACKGROUND: Projections thought to be plaque may be observed inside the stent on angiography or intravascular ultrasound (IVUS) during CAS. Known as plaque protrusion (PP), the incidence and prognosis of this complication are unclear. METHODS: A total of 354 consecutive carotid atherosclerotic stenoses in 328 patients (285 men, 43 women; age range 51 to 97 years [mean age 73...
April 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28426728/pulmonary-vascular-volume-impaired-left-ventricular-filling-and-dyspnea-the-mesa-lung-study
#19
Carrie P Aaron, Eric A Hoffman, Joao A C Lima, Steven M Kawut, Alain G Bertoni, Jens Vogel-Claussen, Mohammadali Habibi, Katja Hueper, David R Jacobs, Ravi Kalhan, Erin D Michos, Wendy S Post, Martin R Prince, Benjamin M Smith, Bharath Ambale-Venkatesh, Chia-Ying Liu, Filip Zemrak, Karol E Watson, Matthew Budoff, David A Bluemke, R Graham Barr
BACKGROUND: Evaluation of impaired left ventricular (LV) filling has focused on intrinsic causes of LV dysfunction; however, pulmonary vascular changes may contribute to reduced LV filling and dyspnea. We hypothesized that lower total pulmonary vascular volume (TPVV) on computed tomography (CT) would be associated with dyspnea and decrements in LV end-diastolic volume, particularly among ever-smokers. METHODS: The Multi-Ethnic Study of Atherosclerosis recruited adults without clinical cardiovascular disease in 2000-02...
2017: PloS One
https://www.readbyqxmd.com/read/28425814/verbal-short-term-memory-and-language-impairments-in-cantonese-speakers-after-stroke
#20
Diana Wai-Lam Ho, Anthony Pak-Hin Kong, Nim-Ting Koon
PURPOSE: The study examined the relationship between verbal short-term memory (STM) and language impairment in Cantonese speakers after stroke. It is hypothesised that Cantonese speakers with left-hemisphere (LH) stroke would perform worse than those with right hemisphere (RH) stroke and normal controls. Specific linguistic factors of Cantonese might affect results in the tasks. METHOD: Fifteen participants with LH stroke, 10 with RH stroke and 25 healthy controls were tested with auditory-verbal immediate serial recall (ISR) tasks and auditory linguistic tasks...
February 21, 2017: International Journal of Speech-language Pathology
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