keyword
MENU ▼
Read by QxMD icon Read
search

Optic nerve ischemia

keyword
https://www.readbyqxmd.com/read/28923584/seeing-the-difference-painless-progressive-vision-loss-in-a-vasculopath
#1
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/28901515/vulnerability-study-of-myelinated-and-unmyelinated-nerve-fibers-in-acute-ocular-hypertension-in-rabbit
#2
Jiying Shen, Qiang Yang, Daoyi Yu, Jihong Wu, Yuanfang Zhu, Wenyi Guo
In the current study, it was aimed to evaluate the changes in myelinated and unmyelinated nerve fibers in retinal ischemia‑reperfusion injuries caused by acute ocular hypertension and to determine the sequence of these changes. Adult healthy New Zealand white rabbits were randomized to the hemodynamic group [n=12; used to determine the optimal intraocular pressure (IOP) for the subsequent experiments] and the hypertension group (n=6; 70‑mmHg hypertension induced in one eye). IOP was adjusted using a cannula and saline...
November 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28878627/optic-nerve-degeneration-after-retinal-ischemia-reperfusion-in-a-rodent-model
#3
Marina Renner, Gesa Stute, Mohammad Alzureiqi, Jacqueline Reinhard, Susanne Wiemann, Heiko Schmid, Andreas Faissner, H Burkhard Dick, Stephanie C Joachim
Retinal ischemia is a common pathomechanism in many ocular disorders such as age-related macular degeneration (AMD), diabetic retinopathy, glaucoma or retinal vascular occlusion. Several studies demonstrated that ischemia/reperfusion (I/R) leads to morphological and functional changes of different retinal cell types. However, little is known about the ischemic effects on the optic nerve. The goal of this study was to evaluate these effects. Ischemia was induced by raising the intraocular pressure (IOP) in one eye of rats to 140 mmHg for 1 h followed by natural reperfusion...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28768527/bilateral-blindness-secondary-to-optic-nerve-ischemia-from-severe-amlodipine-overdose-a-case-report
#4
Raymond Kao, Yves Landry, Genevieve Chick, Andrew Leung
BACKGROUND: Calcium channel blockers are commonly prescribed medications; calcium channel blocker overdose is becoming increasingly prevalent. The typical presentation of a calcium channel blocker overdose is hypotension and decreased level of consciousness. We describe a case of a calcium channel blocker overdose that led to bilateral cortical blindness, a presentation that has not previously been reported. CASE PRESENTATION: A 49-year-old white woman with known bilateral early optic atrophy presented to our hospital with hypotension and obtundation following a known ingestion of 150 mg of amlodipine...
August 3, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28730074/protection-of-retinal-ganglion-cells-against-optic-nerve-injury-by-induction-of-ischemic-preconditioning
#5
Xia Liu, Jiu-Ping Liang, Ou Sha, Song-Juan Wang, Heng-Guo Li, Eric Y P Cho
AIM: To explore if ischemic preconditioning (IPC) can enhance the survival of retinal ganglion cells (RGCs) after optic nerve axotomy. METHODS: Twenty-four hours prior to retinal ischemia 60min or axotomy, IPC was applied for ten minutes in groups of (n=72) animals. The survival of RGCs, the cellular expression of heat shock protein 27 (HSP27) and heat shock protein 70 (HSP70) and the numbers of retinal microglia in the different groups were quantified at 7 and 14d post-injury...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28700390/bartonella-henselae-neuroretinitis-associated-with-central-retinal-vein-occlusion-choroidal-ischemia-and-ischemic-optic-neuropathy
#6
Quraish Ghadiali, Larissa K Ghadiali, Lawrence A Yannuzzi
PURPOSE: We describe a healthy 37-year-old man with Bartonella henselae (B. henselae) neuroretinitis with concurrent central retinal vein occlusion and ischemic optic neuropathy resulting in optic atrophy and choroidal ischemia. METHODS: Case report. RESULTS: A 37-year-old man presented with unilateral decreased vision and a fundus examination consistent with neuroretinitis. Further imaging review supported a concurrent diagnosis of central retinal vein occlusion...
July 11, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28669743/evidence-that-activation-of-p2x7r-does-not-exacerbate-neuronal-death-after-optic-nerve-transection-and-focal-cerebral-ischemia-in-mice
#7
Berrak Caglayan, Ahmet B Caglayan, Mustafa C Beker, Esra Yalcin, Merve Beker, Taha Kelestemur, Elif Sertel, Gürkan Ozturk, Ulkan Kilic, Fikrettin Sahin, Ertugrul Kilic
Conflicting data in the literature about the function of P2X7R in survival following ischemia necessitates the conductance of in-depth studies. To investigate the impacts of activation vs inhibition of the receptor on neuronal survival as well as the downstream signaling cascades, in addition to optic nerve transection (ONT), 30min and 90min of middle cerebral artery occlusion (MCAo) models were performed in mice. Intracellular calcium levels were assessed in primary cortical neuron cultures. Here, we show that P2X7R antagonist Brilliant Blue G (BBG) decreased DNA fragmentation, infarct volume, brain swelling, neurological deficit scores and activation of microglial cells after focal cerebral ischemia...
October 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28619497/long-term-functional-outcome-of-symptomatic-unruptured-intracranial-aneurysms-in-an-interdisciplinary-treatment-concept
#8
Mathias Kunz, Franziska Dorn, Tobias Greve, Veit Stoecklein, Joerg-Christian Tonn, Hartmut Brückmann, Christian Schichor
OBJECTIVE: In symptomatic unruptured intracranial aneurysms (UIAs), data on long-term functional outcome are sparse in the literature, even in the light of modern interdisciplinary treatment decisions. We therefore analyzed our in-house database for prognostic factors and long-term outcome of neurologic symptoms after microsurgical/endovascular treatment. METHODS: Patients treated between 2000 and 2016 after interdisciplinary vascular board decision were included...
September 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28603016/rapid-repeatable-in%C3%A2-vivo-detection-of-retinal-reactive-oxygen-species
#9
Ning Fan, Sean M Silverman, Yang Liu, Xizhen Wang, Byung-Jin Kim, Liping Tang, Abbot F Clark, Xuyang Liu, Iok-Hou Pang
Oxidative injuries, such as those related to reactive oxygen species (ROS), have been implicated in various retinal and optic nerve disorders. Many ROS detection methods have been developed. Although widely utilized, many of these methods are useful only in post mortem tissues, or require relatively expensive equipment, or involve intraocular injection. In the present study, we demonstrated and characterized a chemiluminescent probe L-012 as a noninvasive, in vivo ROS detection agent in the mouse retina. Using optic nerve crush (ONC) and retinal ischemia/reperfusion (I/R) as injury models, we show that L-012 produced intensive luminescent signals specifically in the injured eyes...
August 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28584936/a-review-of-nitric-oxide-for-the-treatment-of-glaucomatous-disease
#10
REVIEW
Joah Aliancy, W Daniel Stamer, Barbara Wirostko
Glaucoma is the leading cause of irreversible blindness worldwide, affecting 64.3 million people. An estimated 60.5 million people are affected by primary open angle glaucoma globally, and this will increase to 111.8 million by 2040. The definition of glaucoma has evolved greatly over time. Although multiple risk factors such as ischemia, inflammation, myopia, race, age and low ocular perfusion pressure may play a role, intraocular pressure (IOP) is still the main risk factor we can easily identify and modify...
June 5, 2017: Ophthalmology and Therapy
https://www.readbyqxmd.com/read/28579891/protective-effect-of-chlorogenic-acid-on-the-focal-cerebral-ischemia-reperfusion-rat-models
#11
Mingsan Miao, Lihua Cao, Ruiqi Li, Xiaoyan Fang, Yanyan Miao
OBJECTIVE: The aim of the study was to investigate the protective characteristic of chlorogenic acid, a natural glucosyl xanthone found in Lonicera Japonica on the cerebral ischemia reperfusion injury and the underlying mechanism. METHODS: Focal cerebral ischemia reperfusion model was built by blocking the left middle cerebral artery in rats by using the suture-occluded method. Before operation, the corresponding drugs were given for each group once a day for 7 days...
May 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28561632/-traumatic-asphyxia-with-permanent-visual-loss-case-report
#12
Tibor Kántor, Bianca Grigorescu, Gabriel Popescu, Attila Ferencz, Örs Nagy, János Jung, István Gergely
Traumatic asphyxia is a rare condition that occurs after compressive thoracoabdominal trauma, which is characterized by subconjunctival hemorrhage, cervicofacial cyanosis, edema and petechiae. Serious life-threatening thoracic and abdominal injuries may coexist. After conservatory treatment in most cases complete recovery is achieved, but in isolated cases permanent neurological lesions may occur. We present the case of the 39-year-old male patient who suffered a compressive thoracoabdominal trauma. The physical examination showed the characteristic "ecchymotic mask"...
June 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28538035/structure-function-analysis-of-nonarteritic-anterior-ischemic-optic-neuropathy-and-age-related-differences-in-outcome
#13
Ming-Hui Sun, Yaping Joyce Liao
BACKGROUND: The optic nerve head is vulnerable to ischemia leading to anterior ischemic optic neuropathy (AION), the most common acute optic neuropathy in those older than 50 years of age. METHODS: We performed a cross-sectional study of 55 nonarteritic anterior ischemic optic neuropathy (NAION) eyes in 34 patients to assess clinical outcome and perform structure-function correlations. RESULTS: The peak age of NAION onset was between 50 and 55 years...
September 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28522972/recent-advances-in-the-study-of-bipolar-rod-shaped-microglia-and-their-roles-in-neurodegeneration
#14
Ngan Pan Bennett Au, Chi Him Eddie Ma
Microglia are the resident immune cells of the central nervous system (CNS) and they contribute to primary inflammatory responses following CNS injuries. The morphology of microglia is closely associated with their functional activities. Most previous research efforts have attempted to delineate the role of ramified and amoeboid microglia in the pathogenesis of neurodegenerative diseases. In addition to ramified and amoeboid microglia, bipolar/rod-shaped microglia were first described by Franz Nissl in 1899 and their presence in the brain was closely associated with the pathology of infectious diseases and sleeping disorders...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28491467/association-between-asymptomatic-unilateral-internal-carotid-artery-stenosis-and-electrophysiological-function-of-the-retina-and-optic-nerve
#15
Anna Machalińska, Aleksandra Kowalska-Budek, Miłosz Piotr Kawa, Arkadiusz Kazimierczak, Krzysztof Safranow, Marta Kirkiewicz, Grażyna Wilk, Wojciech Lubiński, Piotr Gutowski, Bogusław Machaliński
Purpose. This study was designed to assess retinal and optic nerve bioelectrical function in patients with unilateral asymptomatic but hemodynamically significant internal carotid artery stenosis (ICAS). Methods. Forty-two subjects with a diagnosis of unilateral ICAS and 34 controls were analyzed. Full-field electroretinogram (ERG), pattern electroretinogram (PERG), and pattern visual-evoked potentials, as well as optical coherence tomography and ophthalmological examination, were performed. Data analysis included eyes ipsilateral to ICAS (EIS) and eyes contralateral to ICAS (ECS)...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28471894/diffusion-restriction-in-the-optic-nerve-and-retina-in-patients-with-carotid-occlusion
#16
Mikel Vicente, Alba R Serrano, Neus Falgàs, Sergio Borrego, Sergio Amaro, Carlos Cardenal, Xabier Urra
OBJECTIVES: The primary role of magnetic resonance imaging (MRI) in a patient with suspected optic neuropathy is to rule out nonischemic disorders, and many of the reported cases of ischemic optic neuropathy with positive neuroimaging are atypical forms of ischemic optic neuropathy. We studied the role of diffusion-weighted images of MRI in patients with ocular ischemia. METHODS: We describe the clinical, fundoscopic and neuroimaging characteristics of 3 patients with definite ocular ischemia related to occlusion of the carotid artery...
May 2017: Neurologist
https://www.readbyqxmd.com/read/28452993/structural-and-functional-changes-to-the-retina-and-optic-nerve-following-panretinal-photocoagulation-over-a-2-year-time-period
#17
R Filek, P Hooper, T Sheidow, J Gonder, D K Varma, L Heckler, W Hodge, S Chakrabarti, C M L Hutnik
PurposeTo evaluate long-term structural and functional changes to the retina and optic nerve following panretinal photocoagulation (PRP) in diabetic retinopathy (DR) patients.MethodsParticipants were patients with DR requiring PRP and control patients with DR not requiring PRP. The Heidelberg retinal tomography (HRT) and optical coherence tomography (OCT) were performed to analyze the optic nerve and macula. Best-corrected visual acuity (BCVA) and visual field (VF) testing were done to measure central and peripheral vision...
August 2017: Eye
https://www.readbyqxmd.com/read/28439656/-management-of-paraophthalmic-aneurysms-review-of-endovascular-treatment-strategies
#18
P Bhogal, M Aguilar Pérez, G Sauder, H Bäzner, O Ganslandt, H Henkes
BACKGROUND: Aneurysms of the cerebral vessels are relatively common and aneurysms of the ophthalmic segment of the internal carotid artery (ICA) represent approximately 10% of intradural aneurysms. ANATOMICAL ASPECTS: The ophthalmic segment of the ICA extends from the origin of the ophthalmic artery to the origin of the posterior communicating artery. Aneurysms can originate from the ophthalmic artery itself or directly from the ICA at a distance from the ophthalmic artery...
April 24, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28427062/emerging-issues-for-optical-coherence-tomography
#19
REVIEW
Luisa Pierro, Alessandro Rabiolo
Almost 25 years after its introduction, optical coherence tomography (OCT) is still a crucial test in the evaluation of patients affected by diabetic retinopathy. In this chapter, the authors provide an extensive overview of the posterior segment pathological changes induced by diabetes, characterized using OCT. OCT plays a key role in diabetic macular edema (DME) as it assesses related retinal changes both in a qualitative (i.e., DME pattern, presence and aspects of cysts, fluid localization, integrity, and reflectivity of retinal layers) and quantitative (i...
2017: Developments in Ophthalmology
https://www.readbyqxmd.com/read/28415600/the-value-of-mri-in-evaluating-the-efficacy-and-complications-with-the-treatment-of-intra-arterial-chemotherapy-for-retinoblastoma
#20
Shuxian Chen, Xunda Ji, Ming Liu, Zhengrong Xia, Hui Zheng, Qiufeng Yin, He Wang, Yuhua Li
Retinoblastoma is the most common intraocular malignant tumor of childhood. Intra-arterial chemotherapy (IAC) is a recently popularized technique used for the treatment of retinoblastoma, to decrease mortality, increase preservation of the eye, and prevent blindness. Along with the extensive use of IAC, it is important to apply noninvasive examination methods to assess the activity of the tumor and the risk factors for disease dissemination without histopathological confirmation. There are few studies that have assessed the value of magnetic resonance imaging (MRI) in evaluating the efficacy and complications of IAC for retinoblastoma...
June 13, 2017: Oncotarget
keyword
keyword
94224
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"