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Carotid imaging

Mattia Cattaneo, Daniel Staub, Alessandra P Porretta, Jeanne Marie Gallino, Paolo Santini, Costanzo Limoni, Rolf Wyttenbach, Augusto Gallino
Here we provide the correlation among different carotid ultrasound (US) variables to assess echogenicity n standard carotid US and to assess intraplaque neovascularization on contrast enhanced US. We recruited 45 consecutive subjects with an asymptomatic≥50% carotid artery stenosis. Carotid plaque echogenicity at standard US was visually graded according to Gray-Weale classification (GW) and measured by the greyscale median (GSM), a semi-automated computerized measurement performed by Adobe Photoshop(®)...
December 2016: Data in Brief
David Roshal
This case report describes a 41-year-old previously healthy male who presented with stuttering transient ischemic symptoms and radiographic evidence of a left common carotid artery thrombus as well as acute and subacute ischemic infarcts in the left middle cerebral artery territory. An exhaustive stroke work-up did not provide a plausible etiology for his symptoms. His complete blood count and iron studies, however, revealed evidence of severe iron-deficiency anemia without reactive thrombocytosis. His stool guaiac test was positive...
2016: Case Reports in Neurological Medicine
Peter J Kelly, Gregory W Albers, Anastasios Chatzikonstantinou, Gian Marco De Marchis, Julia Ferrari, Paul George, Mira Katan, Michael Knoflach, Jong S Kim, Linxin Li, Eun-Jae Lee, Jean-Marc Olivot, Francisco Purroy, Nicolas Raposo, Peter M Rothwell, Vijay K Sharma, Bo Song, Georgios Tsivgoulis, Cathal Walsh, Yuming Xu, Aine Merwick
BACKGROUND: Identification of patients at highest risk of early stroke after transient ischaemic attack has been improved with imaging based scores. We aimed to compare the validity and prognostic utility of imaging-based stroke risk scores in patients after transient ischaemic attack. METHODS: We did a pooled analysis of published and unpublished individual-patient data from 16 cohort studies of transient ischaemic attack done in Asia, Europe, and the USA, with early brain and vascular imaging and follow up...
November 2016: Lancet Neurology
Joan Porter, Luke Mondor, Moira K Kapral, Jiming Fang, Ruth E Hall
BACKGROUND/AIMS: The reliability of diagnostic coding of acute stroke and transient ischemic attack (TIA) in administrative data is uncertain. The purpose of this study is to determine the agreement between administrative data sources and chart audit for the identification of stroke type, stroke risk factors, and the use of hospital-based diagnostic procedures in patients with stroke or TIA. METHODS: Medical charts for a population-based sample of patients (n = 14,508) with ischemic stroke, intracerebral hemorrhage (ICH), or TIA discharged from inpatient and emergency departments (ED) in Ontario, Canada, between April 1, 2012 and March 31, 2013, were audited by trained abstractors...
October 18, 2016: Cerebrovascular Diseases Extra
Marc A Bouffard, Wayne T Cornblath, Joseph F Rizzo, Michael S Lee, Lindsey B DeLott, Eric R Eggenberger, Nurhan Torun
BACKGROUND: Transient monocular vision loss (TMVL) is an alarming symptom owing to potentially serious etiologies such as thromboembolism or giant cell arteritis. Our objective is to describe the phenomenon of TMVL present on awakening, which may represent a distinct and benign entity. METHODS: We performed a retrospective observational case series of 29 patients who experienced TMVL on awakening. Patients who described monocular dimming or blackout of vision were included, and those with blurred vision, concurrent eye pain, and binocular vision loss were excluded...
September 29, 2016: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
Ady Thien, Angela An Qi See, Samantha Ya Lyn Ang, Nishal Kishinchand Primalani, Mervyn Jun Rui Lim, Yew Poh Ng, Nicolas Kon Kam King
BACKGROUND: The prevalence of asymptomatic unruptured intracranial aneurysms (AUIA) in a Southeast Asian population has not been previously studied. Knowing the disease burden and population at risk can assist us in making informed decisions when managing AUIAs. We aimed to determine if the local prevalence of AUIAs differed from other populations in the published literature. METHODS: Magnetic resonance angiography radiology reports and images for 4572 patients between January 2013 and January 2014 were reviewed for AUIAs...
October 12, 2016: World Neurosurgery
Nolan S Hartkamp, Reinoud P H Bokkers, M J P van Osch, Gert J de Borst, Jeroen Hendrikse
BACKGROUND AND PURPOSE: To assess the effect of unilateral large vessel disease upon the cerebral hemodynamic autoregulatory status in the basal ganglia of patients with steno-occlusive internal carotid artery (ICA) disease. MATERIALS AND METHODS: Twenty-five healthy volunteers and 38 patients with a unilateral symptomatic steno-occlusive ICA lesion and were investigated; 20 with a stenosis >50% and 18 with an occlusion. Cerebral blood flow (CBF) and cerebrovascular reactivity (CVR) were assessed with pseudo-continuous arterial spin labeling (ASL) magnetic resonance (MR) imaging before and after administration of acetazolamide...
October 12, 2016: Journal of Neuroradiology. Journal de Neuroradiologie
Diego D B Carvalho, Andres Mauricio Arias Lorza, Wiro J Niessen, Marleen de Bruijne, Stefan Klein
An automated method for registering B-mode ultrasound (US) and magnetic resonance imaging (MRI) of the carotid arteries is proposed. The registration uses geometric features, namely, lumen centerlines and lumen segmentations, which are extracted fully automatically from the images after manual annotation of three seed points in US and MRI. The registration procedure starts with alignment of the lumen centerlines using a point-based registration algorithm. The resulting rigid transformation is used to initialize a rigid and subsequent non-rigid registration procedure that jointly aligns centerlines and segmentations by minimizing a weighted sum of the Euclidean distance between centerlines and the dissimilarity between segmentations...
October 13, 2016: Ultrasound in Medicine & Biology
Aneesh Mohimen, Santhosh Kumar, E R Jayadevan
PURPOSE: To describe a rare clinical entity of intra-osseous skull base arterio-venous fistula managed with transvenous fistula embolization. CASE DETAILS: 57 year old lady presented with complaints of headache and episodic tinnitus with progressive left sided visual deterioration. Cross sectional imaging of the head revealed multiple vascular channels in the sphenoid bone and in bilateral masticator spaces. Catheter angiography showed presence of a large osseous arterio-venous fistula (AVF) epicentered in the body of sphenoid and left pterygoid plates with arterial feeders from bilateral external carotid arteries and venous drainage...
October 11, 2016: World Neurosurgery
Guillaume Zahnd, Kostas Kapellas, Martijn van Hattem, Anouk van Dijk, André Sérusclat, Philippe Moulin, Aad van der Lugt, Michael Skilton, Maciej Orkisz
The aim of this study was to introduce and evaluate a contour segmentation method to extract the interfaces of the intima-media complex in carotid B-mode ultrasound images. The method was applied to assess the temporal variation of intima-media thickness during the cardiac cycle. The main methodological contribution of the proposed approach is the introduction of an augmented dimension to process 2-D images in a 3-D space. The third dimension, which is added to the two spatial dimensions of the image, corresponds to the tentative local thickness of the intima-media complex...
October 12, 2016: Ultrasound in Medicine & Biology
Joseph F Polak, Daniel H O'Leary
Carotid artery intima-media thickness (IMT) is a noninvasive measurement of the artery wall thickness, inclusive of atherosclerotic plaque, obtained using ultrasound imaging. In the MESA (Multi-Ethnic Study of Atherosclerosis) study, IMT measurements are used as a surrogate for subclinical cardiovascular disease and as a variable predictive of cardiovascular events. IMT measurements of the common carotid artery are available in more than 99% of the MESA population and are predictive of cardiovascular events...
September 2016: Global Heart
Tibor Becske, Matthew B Potts, Maksim Shapiro, David F Kallmes, Waleed Brinjikji, Isil Saatci, Cameron G McDougall, István Szikora, Giuseppe Lanzino, Christopher J Moran, Henry H Woo, Demetrius K Lopes, Aaron L Berez, Daniel J Cher, Adnan H Siddiqui, Elad I Levy, Felipe C Albuquerque, David J Fiorella, Zsolt Berentei, Miklós Marosföi, Saruhan H Cekirge, Peter K Nelson
OBJECTIVE The long-term effectiveness of endovascular treatment of large and giant wide-neck aneurysms using traditional endovascular techniques has been disappointing, with high recanalization and re-treatment rates. Flow diversion with the Pipeline Embolization Device (PED) has been recently used as a stand-alone therapy for complex aneurysms, showing significant improvement in effectiveness while demonstrating a similar safety profile to stent-supported coil treatment. However, relatively little is known about its long-term safety and effectiveness...
October 14, 2016: Journal of Neurosurgery
Ludovico La Grutta, Marta Marasà, Patrizia Toia, Daniele Ajello, Domenico Albano, Erica Maffei, Emanuele Grassedonio, Giuseppina Novo, Massimo Galia, Giuseppe Caruso, Salvatore Novo, Filippo Cademartiri, Massimo Midiri
OBJECTIVE: The aim of the study was to compare the atherosclerotic disease in the coronary and carotid arteries in patients who underwent non-invasive imaging for suspected stable coronary artery disease (CAD). MATERIALS AND METHODS: 107 patients (64 men, age 59 ± 12) with atypical chest pain underwent cardiac CT (CCT) and carotid ultrasound (US) on the same day. Severity (obstructive or not-obstructive disease), location, shape, and composition of atherosclerotic plaques in the two districts were evaluated...
October 13, 2016: La Radiologia Medica
Philip Joseph, Amorina Ishai, Venkatesh Mani, David Kallend, James H F Rudd, Zahi A Fayad, Ahmed Tawakol
PURPOSE: It remains unclear whether changes in arterial wall inflammation are associated with subsequent changes in the rate of structural progression of atherosclerosis. METHODS: In this sub-study of the dal-PLAQUE clinical trial, multi-modal imaging was performed using 18-fludeoxyglucose (FDG) positron emission tomography (PET, at 0 and 6 months) and magnetic resonance imaging (MRI, at 0 and 24 months). The primary objective was to determine whether increasing FDG uptake at 6 months predicted atherosclerosis progression on MRI at 2 years...
October 13, 2016: European Journal of Nuclear Medicine and Molecular Imaging
Xue-Qiao Zhao, Chun Yuan, Prediman K Shah
No abstract text is available yet for this article.
October 18, 2016: Journal of the American College of Cardiology
Robin P Choudhury, Jacqueline S Birks, Venkatesh Mani, Luca Biasiolli, Matthew D Robson, Philippe L L'Allier, Marc-Alexandre Gingras, Nadia Alie, Mary Ann McLaughlin, Craig T Basson, Alison D Schecter, Eric C Svensson, Yiming Zhang, Denise Yates, Jean-Claude Tardif, Zahi A Fayad
BACKGROUND: Evidence suggests that interleukin (IL)-1β is important in the pathogenesis of atherosclerosis and its complications and that inhibiting IL-1β may favorably affect vascular disease progression. OBJECTIVES: The goal of this study was to evaluate the effects of IL-1β inhibition with canakinumab versus placebo on arterial structure and function, determined by magnetic resonance imaging. METHODS: Patients (N = 189) with atherosclerotic disease and either type 2 diabetes mellitus or impaired glucose tolerance were randomized to receive placebo (n = 94) or canakinumab 150 mg monthly (n = 95) for 12 months...
October 18, 2016: Journal of the American College of Cardiology
Manar Khashram, Rachel Falconer, Afif Mahmud, Adib Khanafer, Peter Laws, Tim Beresford, Justin Roake
AIMS: Rapid access carotid endarterectomy (RACE) is the gold standard for stroke prevention in symptomatic patients with 50-99% internal carotid artery stenosis. Diagnosis and referral of eligible patients may be delayed by disruption to local health services. The aim of this study was to evaluate whether service provision was maintained at an appropriate standard (<2 weeks) following a natural disaster. METHODS: Consecutive symptomatic patients who underwent carotid endarterectomy (CEA) at a tertiary hospital between January 2006 and December 2014 were identified...
October 14, 2016: New Zealand Medical Journal
Nari Choi, Jee-Eun Yoon, Byoung-Won Park, Won-Ho Chang, Hyun-Jo Kim, Kyung Bok Lee
We report a case of aortic dissection masquerading as acute ischemic stroke followed by intravenous thrombolysis. A 59-year-old man presented with dizziness. After examination, the patient had a seizure with bilateral Babinski signs. Soon after identifying multiple acute infarctions in both hemispheres on diffusion-weighted brain magnetic resonance (MR) imaging, tissue plasminogen activator (t-PA) was administered. Both common carotid arteries were invisible on MR angiography, and subsequent chest computed tomography revealed an aortic dissection...
October 2016: Korean Journal of Thoracic and Cardiovascular Surgery
J Scott Pannell, David R Santiago-Dieppa, Arvin R Wali, Brian R Hirshman, Jeffrey A Steinberg, Vincent J Cheung, David Oveisi, Jon Hallstrom, Alexander A Khalessi
This study establishes performance metrics for angiography and neuroendovascular surgery procedures based on longitudinal improvement in individual trainees with differing levels of training and experience. Over the course of 30 days, five trainees performed 10 diagnostic angiograms, coiled 10 carotid terminus aneurysms in the setting of subarachnoid hemorrhage, and performed 10 left middle cerebral artery embolectomies on a Simbionix Angio Mentor™ simulator. All procedures were nonconsecutive. Total procedure time, fluoroscopy time, contrast dose, heart rate, blood pressures, medications administered, packing densities, the number of coils used, and the number of stent-retriever passes were recorded...
August 29, 2016: Curēus
(no author information available yet)
[This corrects the article DOI: 10.1371/journal.pone.0161408.].
2016: PloS One
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