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https://www.readbyqxmd.com/read/28916115/-retinal-vein-occlusions
#1
REVIEW
A Pierru, J-F Girmens, E Héron, M Paques
Retinal venous occlusions comprise central retinal vein occlusion, hemiretinal vein occlusions, and branch retinal vein occlusions. They are associated with arterial hypertension and glaucoma. Retinal vein occlusions occur more frequently in males, at a median age of 55. The pathogenesis of retinal venous occlusions remains obscure. The clinical presentation of the disease is variable. In most cases, there is a unilateral visual loss over days with a painless, white and quiet eye. However, retinal venous occlusions may also present as an abrupt and profound loss of vision, or be asymptomatic...
September 12, 2017: Journal Français D'ophtalmologie
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
#2
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/28913838/simultaneous-acquisition-of-perfusion-image-and-dynamic-mr-angiography-using-time-encoded-pseudo-continuous-asl
#3
Yuriko Suzuki, Michael Helle, Peter Koken, Marc Van Cauteren, Matthias J P van Osch
PURPOSE: Both dynamic magnetic resonance angiography (4D-MRA) and perfusion imaging can be acquired by using arterial spin labeling (ASL). While 4D-MRA highlights large vessel pathology, such as stenosis or collateral blood flow patterns, perfusion imaging provides information on the microvascular status. Therefore, a complete picture of the cerebral hemodynamic condition could be obtained by combining the two techniques. Here, we propose a novel technique for simultaneous acquisition of 4D-MRA and perfusion imaging using time-encoded pseudo-continuous arterial spin labeling...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28912596/complete-reperfusion-is-required-for-maximal-benefits-of-mechanical-thrombectomy-in-stroke-patients
#4
Ángel Chamorro, Jordi Blasco, Antonio López, Sergio Amaro, Luis San Román, Laura Llull, Arturo Renú, Salvatore Rudilosso, Carlos Laredo, Victor Obach, Xabier Urra, Anna M Planas, Enrique C Leira, Juan Macho
A mTICI 2b or a mTICI 3 score are currently considered success following mechanical thrombectomy (MT) in acute stroke but is undetermined whether the two scores translate equivalent outcomes. We present a single-center, retrospective cohort of patients with anterior circulation stroke treated with MT and achieving a final mTICI score 2b or 3. A multimodal CT at baseline and a multimodal MRI at 24 hours assessed the growth of the infarct, and the modified Rankin Scale (mRS) assessed functional outcome at 90 days...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28905995/leptomeningeal-collateral-status-predicts-outcome-after-middle-cerebral-artery-occlusion
#5
C F Madelung, C Ovesen, C Trampedach, A Christensen, I Havsteen, C K Hansen, H Christensen
OBJECTIVES: Perfusion through leptomeningeal collateral vessels is a likely pivotal factor in the outcome of stroke patients. We aimed to investigate the effect of collateral status on outcome in a cohort of unselected, consecutive stroke patients with middle cerebral artery occlusion undergoing reperfusion therapy. MATERIALS AND METHODS: This retrospectively planned analysis was passed on prospectively collected data from 187 consecutive patients with middle cerebral artery occlusion admitted within 4...
September 14, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28903939/percutaneous-coronary-intervention-versus-optimal-medical-therapy-for-chronic-total-coronary-occlusion-with-well-developed-collaterals
#6
Se Yeon Choi, Byoung Geol Choi, Seung-Woon Rha, Man Jong Baek, Yang Gi Ryu, Yoonjee Park, Jae Kyeong Byun, Minsuk Shim, Hu Li, Ahmed Mashaly, Won Young Jang, Woohyeun Kim, Jah Yeon Choi, Eun Jin Park, Jin Oh Na, Cheol Ung Choi, Hong Euy Lim, Eung Ju Kim, Chang Gyu Park, Hong Seog Seo, Dong Joo Oh
BACKGROUND: The impact of percutaneous coronary intervention (PCI) on chronic total occlusion in patients with well-developed collaterals is not clear. METHODS AND RESULTS: A total of 640 chronic total occlusion patients with collateral flow grade ≥2 were divided into 2 groups; chronic total occlusion patients either treated with PCI (the PCI group; n=305) or optimal medical therapy (the optimal medical therapy group; n=335). To adjust for potential confounders, a propensity score matching analysis was performed...
September 13, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28902897/testing-the-effects-of-sensory-stimulation-as-a-collateral-based-therapeutic-for-ischemic-stroke-in-c57bl-6j-and-cd1-mouse-strains
#7
Aneeka M Hancock, Ron D Frostig
Utilizing a rat model of ischemic stroke, we have previously shown that sensory stimulation can completely protect rats from impending ischemic damage of cortex if this treatment is delivered within the first two hours post-permanent middle cerebral artery occlusion (pMCAo). The current study sought to extend our findings in rats to mice, which would allow new avenues of research not available in rats. Thus, young adult C57BL/6J and CD1 mice were tested for protection from ischemic stroke with the same protective sensory stimulation-based treatment...
2017: PloS One
https://www.readbyqxmd.com/read/28899897/transfusion-of-polynitroxylated-pegylated-hemoglobin-stabilizes-pial-arterial-dilation-and-decreases-infarct-volume-after-transient-middle-cerebral-artery-occlusion
#8
Suyi Cao, Jian Zhang, Li Ma, Carleton J C Hsia, Raymond C Koehler
BACKGROUND: Polynitroxylation of hemoglobin confers superoxide dismutase-mimetic and peroxidase activity and may protect from reperfusion injury in addition to facilitating oxygen transport. We determined whether transfusion of polynitroxylated PEGylated hemoglobin (PNPH) is protective in the rat filament model of 2 hours of middle cerebral artery occlusion (MCAO). METHODS AND RESULTS: Transfusion of 10 mL/kg of PNPH at 20 minutes of MCAO reduced infarct volume by over 70% (n=10)...
September 12, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28894898/effective-collateral-circulation-may-indicate-improved-perfusion-territory-restoration-after-carotid-endarterectomy
#9
Tianye Lin, Zhichao Lai, Yuelei Lv, Jianxun Qu, Zhentao Zuo, Hui You, Bing Wu, Bo Hou, Changwei Liu, Feng Feng
OBJECTIVES: To investigate the relationship between the level of collateral circulation and perfusion territory normalisation after carotid endarterectomy (CEA). METHODS: This study enrolled 22 patients with severe carotid stenosis that underwent CEA and 54 volunteers without significant carotid stenosis. All patients were scanned with ASL and t-ASL within 1 month before and 1 week after CEA. Collateral circulation was assessed on preoperative ASL images based on the presence of ATA...
September 11, 2017: European Radiology
https://www.readbyqxmd.com/read/28893698/clinical-manifestations-of-isolated-chronic-middle-cerebral-artery-occlusion-in-relation-to-angiographic-features
#10
Hee Sup Shin, Chang-Woo Ryu, Hak Cheol Ko, Soonchan Park, Sang-Beom Kim
BACKGROUND AND PURPOSE: Isolated chronic middle cerebral artery occlusion (ChMCAO) is not a rare condition, and it is known to cause hemodynamic stroke. The purpose of this study was to evaluate differences in the clinical manifestations and prognosis of isolated ChMCAO in relation to angiographic features. METHODS: Fifty-six patients with isolated ChMCAO were enrolled in this retrospectively study. In accordance with the degree of antegrade collateral flow (AF) on angiography, patients were categorized into poor and good AF groups...
September 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28893009/intracranial-aneurysms-involving-circle-of-willis-in-a-child-with-human-immunodeficiency-virus-associated-vasculitis-a-rare-case-report
#11
Amol Madanlal Lahoti, Abhijit Kishor Taori, Avinash Parashuram Dhok, Jitesh Subhash Rawat, Nihar Umakant Chandak
Intracranial Arterial Aneurysms (IAAs) are relatively rare in paediatric population and they account for at least 10%-15% of haemorrhagic strokes which occur during the first two decades of life. Here we present a unique and unusual case of Human Immunodeficiency Virus (HIV) infected child who presented with intracranial aneurysms with formation of collaterals and vasculopathy, demonstrating low viral count despite receiving adequate antiretroviral treatment. Intracranial vascular involvement, their complications and its incidence in these patients may become increasingly common as the management of human immunodeficiency virus infection continues to improve and afflicted patients survive for longer periods because of advancement in the antiretroviral treatment...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892784/ileal-angiodysplasia-presentation-as-a-bowel-obstruction-a-case-report
#12
Ons Ghdes, Ali Gaja, Ahlem Blel, Hichem Jarraya, Najla Mnif
INTRODUCTION: Angiodysplasia is a common vascular abnormality of the gastrointestinal tract, found in the elderly and most frequently revealed by gastrointestinal bleeding. We report an original case of ileal angiodysplasia in an 83-year-old woman presenting as a bowel obstruction. CASE PRESENTATION: An 83-year-old woman with a medical history of chronic untreated anemia, presented with cardinal symptoms of bowel obstruction. Computed tomography revealed diffuse ileal wall thickening with multiple zones of stenosis, which were aggravated by an ileal perforation and associated with vascular abnormalities compatible with angiodysplasia...
July 24, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28890058/reversal-of-acute-mesenteric-ischemia-by-salvation-of-the-meandering-mesenteric-artery-with-stenting-of-the-left-internal-iliac-artery
#13
Kotsis Thomas, Christoforou P, Nastos C, Chatziioannou A, Theodosopoulos T
The presence of the meandering mesenteric artery, which is a non-constant tortuous arterial component unifying the peripheral intestinal circulation, is evidence of chronic occlusive disease of the main intestinal arteries. This collateral intestinal arterial pathway, when present, must be preserved in any abdominal intervention, as it is often the only remaining arterial supply of the intestine; its ligation can be accompanied by intestinal ischemia. We present herein, the case of a 42-year old man, heavy smoker, who had chronic mesenteric ischemia without particular clinical manifestations till the hospitalization for acute myocardial infarction for which he underwent balloon angioplasty and stenting of the left circumflex coronary artery...
September 7, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28885394/pleiotrophin-levels-are-associated-with-improved-coronary-collateral-circulation
#14
Pinar Türker Duyuler, Serkan Duyuler, Murat Gök, Harun Kundi, Canan Topçuoğlu, Ümit Güray
OBJECTIVES: Elucidation of the underlying mechanisms of angiogenesis and arteriogenesis in coronary collateral formation is necessary for new therapies. Pleiotrophin is a secreted multifunctional cytokine and associated with the formation of functional cardiovascular neovascularization in a series of experimental animal models. We aimed to evaluate the serum levels of pleiotrophin in patients with chronic total coronary artery occlusion and poor or good collateral development. METHODS: We included 88 consecutive patients (mean age of the entire population: 63...
September 6, 2017: Coronary Artery Disease
https://www.readbyqxmd.com/read/28882658/increased-risk-for-unfavorable-outcome-in-patients-with-pre-existing-disability-undergoing-endovascular-therapy
#15
Ronen R Leker, Pavel Gavriliuc, Nour Eddine Yaghmour, John M Gomori, Jose E Cohen
INTRODUCTION: Most studies evaluating endovascular therapy (EVT) for stroke only included patients without pre-existing disabilities. However, in real life many patients have pre-existing disabilities, and whether they can benefit from EVT remains unknown. METHODS: Patients with emergent large vessel occlusions undergoing EVT were prospectively enrolled. Patients with no or mild pre-existing disabilities (modified Rankin Scale [mRS], 0-2) were compared with patients presenting with pre-existing moderate disability (mRS ≥ 3)...
September 4, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28875380/balloon-occluded-retrograde-transvenous-obliteration-of-varices-focusing-on-the-portal-hemodynamics-and-the-recent-techniques
#16
REVIEW
Shozo Hirota, Kaoru Kobayashi, Yasukazu Kako, Haruyuki Takaki, Koichiro Yamakado
PURPOSE: To evaluate the recent topics of Ballloon-occluded retrograde trasnvenous obliteration(B-RTO). METHOD: We overviewed the recent scientific papers regarding B-RTO. RESULT: B-RTO is a treatment method for occluding varices retrogradely using a sclerosing agent under balloon occlusion of a major draining vein. It has been recognized as an effective treatment method for gastric varices. Hepatic function reserve is improved and liver volume is increased after B-RTO...
September 5, 2017: Hepatology International
https://www.readbyqxmd.com/read/28872119/intravital-microscopy-of-monocyte-homing-and-tumor-related-angiogenesis-in-a-murine-model-of-peripheral-arterial-disease
#17
Martin Wagner, Claudia Baer, Werner Zuschratter, Monika Riek-Burchardt, Christian Deffge, Soenke Weinert, Jerry C Lee, Ruediger C Braun-Dullaeus, Joerg Herold
The therapeutic goal for peripheral arterial disease and ischemic heart disease is to increase blood flow to ischemic areas caused by hemodynamic stenosis. Vascular surgery is a viable option in selected cases, but for patients without indications for surgery such as progression to rest pain, critical limb ischemia, or major disruptions to life or work, there are few possibilities for mitigating their disease. Cell therapy via monocyte-enhanced perfusion through the stimulation of collateral formation is one of a few non-invasive options...
August 26, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28870391/determinants-of-adverse-outcomes-after-systemic-to-pulmonary-shunts-in-biventricular-circulation
#18
Ben Hobbes, Yves d'Udekem, Diana Zannino, Igor E Konstantinov, Christian Brizard, Johann Brink
BACKGROUND: Systemic-to-pulmonary shunts are useful palliative procedures, although many teams have been deterred by high mortality and morbidity. We aimed to identify predictors of adverse outcomes after shunts in biventricular lesions. METHODS: From 2004 to 2014, 173 children had shunt procedures. Morphologies included: tetralogy of Fallot, pulmonary atresia with ventricular septal defect (VSD) with and without major aortopulmonary collaterals (MAPCAs), transposition of great arteries with pulmonary stenosis, and double outlet right ventricle...
September 1, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28869961/contribution-of-neuro-imaging-for-prediction-of-functional-recovery-after-ischemic-stroke
#19
Wolf-Dieter Heiss
Prediction measures of recovery and outcome after stroke perform with only modest levels of accuracy if based only on clinical data. Prediction scores can be improved by including morphologic imaging data, where size, location, and development of the ischemic lesion is best documented by magnetic resonance imaging. In addition to the primary lesion, the involvement of fiber tracts contributes to prognosis, and consequently the use of diffusion tensor imaging (DTI) to assess primary and secondary pathways improves the prediction of outcome and of therapeutic effects...
September 5, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28867470/collateral-circulation-in-chronic-aortic-occlusive-disease
#20
Zhongzhi Jia, Guomin Jiang
No abstract text is available yet for this article.
August 31, 2017: European Journal of Vascular and Endovascular Surgery
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