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Carotid imaging

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https://www.readbyqxmd.com/read/28935983/model-based-vascular-elastography-improves-the-detection-of-flow-induced-carotid-artery-remodeling-in-mice
#1
Vyacheslav A Korshunov, Hexuan Wang, Rifat Ahmed, Deanne M Mickelsen, Qian Zhou, Chen Yan, Marvin M Doyley
Increased arterial thickness measured with ultrasound correlates with future cardiovascular events, but conventional ultrasound imaging techniques cannot distinguish between intima, media, or atherosclerotic plaque in the carotid artery. In this work, we evaluated how well vascular elastography can detect intimal changes in a mouse model of carotid remodeling. We ligated the left external and internal branches of the carotid artery of male FVB mice and performed sham operations for 2 weeks. High-resolution ultrasound imaging accurately detected lower blood velocities and low blood volume flow in the carotid arteries after ligation in FVB mice...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935928/location-of-cerebral-microbleeds-and-their-association-with-carotid-intima-media-thickness-a-community-based-study
#2
Chih-Ping Chung, Kun-Hsien Chou, Wei-Ta Chen, Li-Kuo Liu, Wei-Ju Lee, An-Chun Huang, Liang-Kung Chen, Ching-Po Lin, Pei-Ning Wang
To assess whether high cerebral microbleeds (CMBs) are associated with carotid intima-media thickness (CIMT), a marker of systemic atherosclerosis, we cross-sectionally evaluated participants from a community-based study, the I-Lan Longitudinal Aging Study. The participants' demographics and cardiovascular risk factors were determined by questionnaire and/or laboratory measurements. CIMT was measured by ultrasonography. CMBs were assessed by susceptibility-weighted-imaging on 3 T MRI. Of the 962 subjects [62...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28934833/hemodynamic-analysis-of-radiation-induced-damage-in-common-carotid-arteries-by-using-color-doppler-ultrasonography
#3
Alireza Mohammadkarim, Manijhe Mokhtari-Dizaji, Ali Kazemian, Hazhir Saberi
Purpose: The aim of this study was to assess vascular changes and blood flow abnormalities in the common carotid arteries of patients with head and neck cancers after external radiotherapy, using color Doppler ultrasonography. Methods: We studied 24 patients treated with external radiotherapy for various head and neck cancers. In order to study the acute effects of irradiation on common carotid blood flow and arterial diameter changes, color Doppler ultrasonography parameters such as peak systolic velocity, end diastolic velocity, mean velocity, systolic-to-diastolic velocity (S/D) ratio, pulsatility index (PI), resistive index (RI), and instantaneous diameter changes were evaluated before and after external radiotherapy...
April 14, 2017: Ultrasonography
https://www.readbyqxmd.com/read/28932983/prevention-and-management-of-vascular-complications-in-middle-ear-and-cochlear-implant-surgery
#4
Filippo Di Lella, Maurizio Falcioni, Silvia Piccinini, Ilaria Iaccarino, Andrea Bacciu, Enrico Pasanisi, Davide Cerasti, Vincenzo Vincenti
The objective of this study is to illustrate prevention strategies and management of vascular complications from the jugular bulb (JB) and internal carotid artery (ICA) during middle ear surgery or cochlear implantation. The study design is retrospective case series. The setting is tertiary referral university hospital. Patients were included if presented pre- or intraoperative evidence of high-risk anatomical anomalies of ICA or JB during middle ear or cochlear implant surgery, intraoperative vascular injury, or revision surgery after the previous iatrogenic vascular lesions...
September 20, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28932744/unilateral-aplasia-versus-bilateral-aplasia-of-the-vertebral-artery-a-review-of-associated-abnormalities
#5
REVIEW
L Vasović, M Trandafilović, S Vlajković, G Djordjević, M Daković-Bjelaković, M Pavlović
Morphological characteristics of 108 cases of uni- and bilateral aplasia of the vertebral artery (VA) in reports or images of retrospective studies, including one recent case, published between 1967 and 2016 are analyzed. Incidence, gender, persistence of carotid-vertebrobasilar anastomosis (CVBA), associated with other vascular variants, and vascular pathology in each group of uni- and bilateral VA aplasia are mutually compared. Most of the cases of VA aplasia in ages 31 to 80 were discovered in USA, Japan, and India...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28931265/diagnostic-and-interventional-optical-angioscopy-in-ex-vivo-carotid-arteries
#6
Luis E Savastano, Neeraj Chaudhary, Carlos Murga-Zamalloa, Michael Wang, Thomas Wang, B Gregory Thompson
BACKGROUND: Angioscopy - or endovascular endoscopy - is a catheter-based technique employing a flexible fiberoptic angioscope to directly visualize arterial lumen. Poor resolution and excessive stiffness of pre-existent angioscopes limited their use clinically. Recent advances resulted in novel fused optical fiber bundle angioscopes with improved flexibility and imaging resolution. Use of these devices in endovascular neurosurgery is still largely unexplored. OBJECTIVE: To evaluate image quality and feasibility of optical angioscopes for diagnostic and interventional neuro-angioscopy in carotid arteries of human cadavers...
February 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28930197/red-blood-cell-eicosapentaenoic-acid-inversely-relates-to-mri-assessed-carotid-plaque-lipid-core-burden-in-elders-at-high-cardiovascular-risk
#7
Núria Bargalló, Rosa Gilabert, Edwin-Saúl Romero-Mamani, Montserrat Cofán, Philip C Calder, Montserrat Fitó, Dolores Corella, Jordi Salas-Salvadó, Miguel Ruiz-Canela, Ramon Estruch, Emilio Ros, Aleix Sala-Vila
Supplemental marine omega-3 eicosapentaenoic acid (EPA) has an anti-atherosclerotic effect. Clinical research on EPA supplied by the regular diet and atherosclerosis is scarce. In the framework of the PREvención con DIeta MEDiterránea (PREDIMED) trial, we conducted a cross-sectional study in 161 older individuals at high vascular risk grouped into different stages of carotid atherosclerosis severity, including those without ultrasound-detected atheroma plaque (n = 38), with plaques <2.0 mm thick (n = 65), and with plaques ≥2...
September 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28929836/the-relationship-between-blood-flow-impairment-and-oxygen-depletion-in-acute-ischemic-stroke-imaged-with-magnetic-resonance-imaging
#8
Alexander Seiler, Nicholas P Blockley, Ralf Deichmann, Ulrike Nöth, Oliver C Singer, Michael A Chappell, Johannes C Klein, Marlies Wagner
Oxygenation-sensitive spin relaxation time T2' and relaxation rate R2' (1/T2') are presumed to be markers of the cerebral oxygen extraction fraction (OEF) in acute ischemic stroke. In this study, we investigate the relationship of T2'/R2' with dynamic susceptibility contrast-based relative cerebral blood flow (rCBF) in acute ischemic stroke to assess their plausibility as surrogate markers of the ischemic penumbra. Twenty-one consecutive patients with internal carotid artery and/or middle cerebral artery occlusion were studied at 3...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28927123/diagnosis-and-surgical-treatment-of-carotid-body-tumor-a-retrospective-analysis-of-58-patients
#9
Qingquan Hua, Zhen Xu, Yang Jiang
The aim of the present study was to illustrate the diagnosis and treatment of carotid body tumor (CBT) based on our experience of previous patients. A total of 58 patients (62 lesions) with CBT who received surgery between October 2003 and October 2013 were included. In total, 17 lesions were categorized into Shamblin grade I, 33 were grade II, and 12 were grade III. Surgical resection of CBT was performed for 52 lesions, resection of CBT and the external carotid artery was performed for 9 lesions, and resection of CBT and the internal carotid artery was performed for 1 lesion...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28926370/photon-counting-computed-tomography-for-vascular-imaging-of-the-head-and-neck-first-in-vivo-human-results
#10
Rolf Symons, Daniel S Reich, Mohammadhadi Bagheri, Tyler E Cork, Bernhard Krauss, Stefan Ulzheimer, Steffen Kappler, David A Bluemke, Amir Pourmorteza
PURPOSE: The purpose of this study was to evaluate image quality of a spectral photon-counting detector (PCD) computed tomography (CT) system for evaluation of major arteries of the head and neck compared with conventional single-energy CT scans using energy-integrating detectors (EIDs). METHODS: In this institutional review board-approved study, 16 asymptomatic subjects (7 men) provided informed consent and received both PCD and EID contrast-enhanced CT scans of the head and neck (mean age, 58 years; range, 46-75 years)...
September 18, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28926162/retinal-vessel-morphology-in-rheumatoid-arthritis-association-with-systemic-inflammation-subclinical-atherosclerosis-and-cardiovascular-risk
#11
Panagiota Anyfanti, Areti Triantafyllou, Eugenia Gkaliagkousi, Nikolaos Koletsos, Georgios Athanasopoulos, Xenophon Zabulis, Vasiliki Galanopoulou, Spyros Aslanidis, Stella Douma
OBJECTIVE: Quantification of retinal vessel morphology has emerged as a marker of cardiovascular health. We examined retinal microvascular diameters in RA, particularly in regard with systemic inflammation, subclinical atherosclerosis and cardiovascular risk. METHODS: Retinal images from RA patients and controls were processed using computerized software, to obtain central retinal arteriolar (CRAE) and venular (CRVE) equivalent and arteriovenous ratio (AVR). Subclinical atherosclerosis was assessed with carotid intima-media thickness (cIMT), and 10-year risk of general cardiovascular disease was calculated...
September 19, 2017: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/28925747/protocol-and-quality-assurance-for-carotid-imaging-in-100-000-participants-of-uk-biobank-development-and-assessment
#12
Sean Coffey, Adam J Lewandowski, Steve Garratt, Rudy Meijer, Steven Lynum, Ram Bedi, James Paterson, Mohammad Yaqub, J Alison Noble, Stefan Neubauer, Steffen E Petersen, Naomi Allen, Cathie Sudlow, Rory Collins, Paul M Matthews, Paul Leeson
Background Ultrasound imaging is able to quantify carotid arterial wall structure for the assessment of cerebral and cardiovascular disease risks. We describe a protocol and quality assurance process to enable carotid imaging at large scale that has been developed for the UK Biobank Imaging Enhancement Study of 100,000 individuals. Design An imaging protocol was developed to allow measurement of carotid intima-media thickness from the far wall of both common carotid arteries. Six quality assurance criteria were defined and a web-based interface (Intelligent Ultrasound) was developed to facilitate rapid assessment of images against each criterion...
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/28923584/seeing-the-difference-painless-progressive-vision-loss-in-a-vasculopath
#13
Jenny L Lauschke, Katherine Masselos, Jennifer Sandbach, Clare L Fraser
A 78-year-old Caucasian man with significant vascular disease reported sudden onset of worsened vision during a routine wound-care appointment for non-healing necrotic leg ulcers. He described painless blurring of vision with grey scotomas in his RE, his only well-seeing eye, following trauma to the LE as a child. He presented with retinal ischemia, a cotton-wool spot and optic nerve swelling. Temporal artery biopsy showed myxoid degeneration and extensive calcium deposition which also was shown on imaging throughout his carotid and vertebral arterial system, the clinical picture of calciphylaxis...
September 15, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28923141/carotid-and-femoral-arterial-wall-distensibility-during-long-duration-spaceflight
#14
Philippe Arbeille, Romain Provost, Kathryn Zuj
INTRODUCTION: This study aimed to assess changes in common carotid (CA) and superficial femoral (FA) arterial stiffness during long-duration spaceflight. METHODS: Ultrasound imaging was used to investigate the CA and FA of 10 astronauts preflight (PRE), on flight day 15 (FD15), after 4-5 mo (FD4-5m), and 4 d after return to Earth (R+4). Arterial wall properties were assessed through the calculation of strain, stiffness (β), pressure-strain elastic modulus (Ep), and distensibility (DI)...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28922275/indications-for-ct-angiography-of-the-vertebral-arteries-after-trauma
#15
Joseph P Drain, Douglas S Weinberg, James S Ramey, Timothy A Moore, Heather A Vallier
STUDY DESIGN: Retrospective. OBJECTIVE: The purpose of this project is to identify factors that predict vertebral artery injury (VAI) in an effort to assess risks and benefits of computed tomography angiography (CT-A) of the neck in the trauma setting. We seek to develop guidelines for practitioners to stratify patients at medium/high risk of VAI from those who are at low risk. SUMMARY OF BACKGROUND DATA: VAI and blunt carotid injury (BCI) together comprise blunt cerebrovascular injury (BCVI)...
September 15, 2017: Spine
https://www.readbyqxmd.com/read/28920508/internal-carotid-artery-dissection-among-younger-and-older-patients-with-acute-ischemic-stroke
#16
Y Amsalem, L Porat, M C Javitt, E Sprecher, G Telman
BACKGROUND: Carotid artery dissection (CAD) is a known causative factor in the etiology of acute ischemic stroke in young patients. However, the significance of CAD in older patients with acute ischemic stroke is unclear with only a few prior clinical studies. In order to isolate the influence of CAD as an independent factor, we performed multivariate analysis of common covariables in acute ischemic stroke patients in northern Israel. PATIENTS AND METHODS: 347 consecutive patients who suffered from acute ischemic stroke had initial CT angiography (CTA) ordered from the emergency room...
September 16, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28919565/treatment-of-large-or-giant-cavernous-aneurysm-associated-with-a-persistent-trigeminal-artery-a-case-report-and-review-of-literature
#17
Tatsuya Ishikawa, Koji Yamaguchi, Hidenori Anami, Masatake Sumi, Tomomi Ishikawa, Takakazu Kawamata
BACKGROUND: Primitive trigeminal artery (PTA) is the most common anomaly of primitive carotid-basilar anastomosis and is associated with cerebrovascular anomalies, such as aneurysm. Large or giant cavernous aneurysm associated with PTA is rare, and the treatment strategies differ in comparison to large or giant aneurysm without PTA. In this article, we report an unusual case of a giant cavernous aneurysm associated with PTA and review treatment strategies for large or giant cavernous aneurysm associated with PTA...
September 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28919313/periprocedural-outcomes-of-carotid-artery-stenting-in-elderly-patients
#18
Masataka Nanto, Yudai Goto, Hiroyuki Yamamoto, Seisuke Tanigawa, Michiko Takado, Takahiro Ogawa, Yoshikazu Nakahara
BACKGROUND: Carotid artery stenting has emerged as an alternative to carotid endarterectomy especially in patients with high risk of carotid endarterectomy. Older age (≥80 years old) was recognized as one of the high risk factors of carotid endarterectomy. However, the association between older age and increased risk of adverse events for carotid artery stenting has been reported. The purpose of this study was to evaluate the association between age and periprocedural outcomes after carotid artery stenting...
September 14, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28915102/acceleration-selective-arterial-spin-labeling-mr-angiography-used-to-visualize-distal-cerebral-arteries-and-collateral-vessels-in-moyamoya-disease
#19
Osamu Togao, Akio Hiwatashi, Makoto Obara, Koji Yamashita, Kazufumi Kikuchi, Ryotaro Kamei, Ataru Nishimura, Koichi Arimura, Koji Yoshimoto, Koji Iihara, Marc Van Cauteren, Hiroshi Honda
Purpose To evaluate and compare the performance of acceleration-selective arterial spin labeling (AccASL) magnetic resonance (MR) angiography in the visualization of cerebral arteries and collateral vessels in patients with Moyamoya disease with that of time-of-flight (TOF) MR angiography, with digital subtraction angiography (DSA) as the reference standard. Materials and Methods Thirty-six cerebral hemispheres from 22 patients with Moyamoya disease underwent TOF and AccASL MR angiography and DSA. Qualitative evaluations included imaging of the terminal internal carotid artery (ICA), distal middle cerebral arteries (MCAs), Moyamoya vessels, and leptomeningeal anastomosis (LMA) collaterals with reference to DSA...
September 15, 2017: Radiology
https://www.readbyqxmd.com/read/28912200/development-and-validation-of-electronic-quality-measures-to-assess-care-for-patients-with-transient-ischemic-attack-and-minor-ischemic-stroke
#20
Dawn M Bravata, Laura J Myers, Eric Cheng, Mathew Reeves, Fitsum Baye, Zhangsheng Yu, Teresa Damush, Edward J Miech, Jason Sico, Michael Phipps, Alan Zillich, Jason Johanning, Seemant Chaturvedi, Curt Austin, Jared Ferguson, Bailey Maryfield, Kathy Snow, Susan Ofner, Glenn Graham, Rachel Rhude, Linda S Williams, Greg Arling
BACKGROUND: Despite interest in using electronic health record (EHR) data to assess quality of care, the accuracy of such data is largely unknown. We sought to develop and validate transient ischemic attack and minor ischemic stroke electronic quality measures (eQMs) using EHR data. METHODS AND RESULTS: A random sample of patients with transient ischemic attack or minor ischemic stroke, cared for in Veterans Health Administration facilities (fiscal year 2011), was identified...
September 2017: Circulation. Cardiovascular Quality and Outcomes
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