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Ischemic optic neuropathy

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https://www.readbyqxmd.com/read/29140815/neuroimaging-diagnostic-and-monitoring-approaches-in-ophthalmology
#1
Bart K Chwalisz, Marc A Bouffard, Sashank Prasad, Dean M Cestari
PURPOSE OF REVIEW: We review new applications of optical coherence tomography (OCT) technology in neuro-ophthalmology. We also describe new technologies for visualizing the extracranial vessels in the diagnosis of giant cell arteritis (GCA). RECENT FINDINGS: Newer OCT modalities are expanding the evaluation of the optic disc, and are being applied to a number of neurologic conditions such as demyelinating and neurodegenerative disease. Swept-source OCT and enhanced-depth imaging OCT are refining the fine-grained analysis of the optic nerve head in the diagnosis of papilledema and optic nerve drusen...
November 14, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29135814/neuro-ophthalmology-at-a-tertiary-eye-care-centre-in-india
#2
Rebika Dhiman, Digvijay Singh, Shiva P Gantayala, Vaitheeswaran L Ganesan, Pradeep Sharma, Rohit Saxena
BACKGROUND: Neuro-ophthalmology as a specialty is underdeveloped in India. The aim of our study was to determine the spectrum and profile of patients presenting to a tertiary eye care center with neuro-ophthalmic disorders. METHODS: A retrospective hospital-based study was conducted, and records of all patients seen at the neuro-ophthalmology clinic of Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India, over a 1-year period were retrieved and evaluated...
November 9, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29130572/ischemic-optic-neuropathy-in-a-dog-with-acute-bilateral-blindness-and-primary-systemic-hypertension
#3
L Mari, R Stavinohova, E Dominguez, J Premont, J Oliver, L De Risio
A 6-year-old neutered female Jack Russell terrier was investigated for sudden onset prechiasmatic bilateral blindness, left circling, reduced proprioception in the right pelvic limb and right facial allodynia. Electroretinography was normal. Magnetic resonance imaging (MRI) examination revealed that the right optic nerve and the optic chiasm were hyperintense on diffusion weighted imaging and hypointense on apparent diffusion coefficient map consistent with ischemic optic neuropathy. A concurrent lacunar infarct was detected in the left rostral colliculus...
November 12, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/29120976/case-report-masquerading-large-vessel-giant-cell-arteritis
#4
Paul Jacquier, Raphael Wuarin, Carlo Chizzolini, Gabriele Thumann, Heimo Steffen, Argyrios Chronopoulos
SIGNIFICANCE: Large-vessel giant cell arteritis (GCA) can be a diagnostic dilemma for the eye care provider because it may not involve the typical cranial arteries. When any of its potential ocular complications are diagnosed, it is important to consider this unusual form of GCA. PURPOSE: To report an unusual ophthalmic presentation of large-vessel GCA with sequential bilateral anterior ischemic optic neuropathy and branch retinal artery occlusion. METHODS: A 65-year-old previously healthy woman experienced sequential bilateral anterior ischemic optic neuropathy with branch retinal artery occlusion in the absence of other signs and symptoms suggestive of cranial GCA...
November 9, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29109895/are-all-retinal-nerve-fiber-layer-defects-on-optic-coherence-tomography-glaucomatous
#5
Sirel Gür Güngör, Akman Ahmet
Objectives: In this study, we investigated the patients who were referred to our clinic with a prediagnosis of glaucoma based on retinal nerve fiber layer (RNFL) defects on optic coherence tomography (OCT) but were determined to have nonglaucomatous RNLF defects upon detailed examination. Materials and Methods: The ophthalmic examination notes, OCT images, Heidelberg retinal tomography (HRT) II and fundus photographs of 357 patients were retrospectively evaluated...
October 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/29108750/new-spectrum-of-the-neurologic-consequences-of-zika
#6
EDITORIAL
Marco T Medina, Marco Medina-Montoya
Zika virus infection represents a new neuropathological agent with association to a wide spectrum of neurological complications: a) Congenital Zika Syndrome by affecting the neural stem cells of the human fetal brain; b) Guillain-Barré Syndrome by an autoimmune response against peripheral myelin and/or axonal components or probable direct inflammatory reaction; c) Encephalitis/meningoencephalitis and myelitis by a direct viral inflammatory process on the central nervous system; d) Sensory neuropathy by infecting directly the peripheral neurons and causing substantial cell death and pathogenic transcriptional dysregulation; e) Acute Disseminated Encephalomyelitis and optic neuropathy; f) Seizures and Epilepsy and g) childhood arterial ischemic stroke by probable inflammatory reaction and endothelial injury...
November 1, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29107469/diseases-of-the-retina-and-the-optic-nerve-associated-with-obstructive-sleep-apnea
#7
REVIEW
Marielle Mentek, Florent Aptel, Diane Godin-Ribuot, Renaud Tamisier, Jean-Louis Pepin, Christophe Chiquet
Many associations between ocular disorders and obstructive sleep apnea (OSA) have been studied, such as nonarteritic anterior ischemic optic neuropathy, glaucoma, papilledema, retinal vein occlusion, eyelid hyperlaxity, lower-eyelid ectropion and recurrent corneal erosions. The objective of this review is to synthetize the possible vascular disorders of the retina and the optic nerve associated with sleep apnea patients and to discuss the underlying pathophysiological hypotheses. Main mechanisms involved in the ocular complications of OSA are related to intermittent hypoxia, sympathetic system activation, oxidant stress, and deleterious effects of endothelin 1...
May 29, 2017: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/29077178/ocular-blood-flow-in-steep-trendelenburg-positioning-during-robotic-assisted-radical-prostatectomy
#8
Christian L Demasi, Francesco Porpiglia, Augusto Tempia, Savino D'Amelio
PURPOSE: Several ischemic optic neuropathies that occurred during robotic-assisted laparoscopic radical prostatectomy (RALRP) have been reported to be due to the Trendelenburg position, which lowers ocular perfusion pressure (OPP). We examined changes in pulsatile ocular blood flow (POBF) and its correlation with OPP during RALRP in the steep Trendelenburg position. METHODS: Pulsatile ocular blood flow and intraocular pressure (IOP) were measured in 50 patients by the OBF Langham System 5 times during RALRP...
October 25, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29065678/bilateral-optic-neuropathy-related-to-severe-anemia-in-a-patient-with-alcoholic-cirrhosis-a-case-report-and-review-of-the-literature
#9
Lisa Humbertjean-Selton, Jérôme Selton, Nolwenn Riou-Comte, Jean-Christophe Lacour, Gioia Mione, Sébastien Richard
Anemia appears frequently in patients with alcoholic liver disease (ALD) but has never been linked to bilateral nonarteritic anterior ischemic optic neuropathy (NAION). A 65-year-old woman with a medical history of alcoholic cirrhosis was admitted for bilateral NAION. On admission, she was found to have a low arterial pressure and severe normocytic anemia (48 g/L). The anemia was related to chronic bleeding due to antral gastritis along with other factors associated with ALD. The applied treatment consisted of urgent transfusion followed by high doses of proton-pump inhibitors, iron and vitamin supplementation, and support in lifestyle measures...
October 25, 2017: Clinical and Molecular Hepatology
https://www.readbyqxmd.com/read/29049405/differences-in-pupillary-light-reflex-between-optic-neuritis-and-ischemic-optic-neuropathy
#10
Yung Ju Yoo, Jeong-Min Hwang, Hee Kyung Yang
OBJECTIVES: To determine the differences in pupillary light reflex (PLR) between the acute and chronic phases of optic neuritis (ON) and nonarteritic anterior ischemic optic neuropathy (NAION). METHODS: The study included 30 patients with ON and 22 patients with NAION whose PLR were measured by a dynamic pupillometer (PLR-200; NeurOptics Inc., Irvine, USA). Age-matched controls included 58 healthy individuals with normal vision and optic nerve function. Pupil diameters, latency, constriction ratio, constriction velocity and dilation velocity were noted...
2017: PloS One
https://www.readbyqxmd.com/read/29042528/-a-case-of-ruptured-anterior-communicating-artery-aneurysm-with-visual-field-defects-and-deteriorating-to-severe-vision-loss
#11
Kazuki Sakakura, Go Ikeda, Yasunobu Nakai, Noriyuki Watanabe, Masanari Shiigai, Kazuya Uemura, Tetsuya Yamamoto, Akira Matsumura
Although Terson's syndrome is a well-known cause of vision loss due to intracerebral aneurysm rupture, optic nerve neuropathy can also occur because of other causes. Here, we report such a case, i.e., a ruptured anterior communicating artery aneurysm accompanied by vision loss and visual field disturbances due to a cause other than Terson's syndrome. A 47-year-old man presented with right superior altitudinal hemianopia. Computed tomography (CT) showed subarachnoid hemorrhage (SAH), and three-dimensional CT angiography revealed an anterior communicating artery aneurysm...
October 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/29033621/nonarteritic-anterior-ischemic-optic-neuropathy-cause-effect-and-management
#12
REVIEW
Shauna Berry, Weijie V Lin, Ama Sadaka, Andrew G Lee
Nonarteritic anterior ischemic optic neuropathy (NAION) is the most common form of ischemic optic neuropathy and the second most common optic neuropathy. Patients are generally over the age of 50 years with vasculopathic risk factors (eg, diabetes mellitus, hypertension, and obstructive sleep apnea). The exact mechanism of NAION is not fully understood. In addition, several treatment options have been proposed. This article summarizes the current literature on the diagnosis, treatment, and management of NAION...
2017: Eye and Brain
https://www.readbyqxmd.com/read/29024675/tempo-ral-was-the-heart-of-the-matter
#13
Francesco Pellegrini, Daniele Cirone, Piernicola Machin, Rod Foroozan
A 71-year-old woman was admitted with fever, headache and weight loss associated with elevated inflammatory markers. She developed acute bilateral ophthalmoplegia and asymmetrical ptosis rapidly followed by anterior ischemic optic neuropathy. Although the first temporal artery biopsy (TAB) was negative, contralateral TAB revealed features consistent with giant cell arteritis. Even while under steroid therapy, the patient died a few days later from myocardial infarction. Acute bilateral complete ophthalmoplegia is a rare presentation of a limited number of possible diseases...
October 9, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/29016409/anterior-ischemic-optic-neuropathy-due-to-calciphylaxis
#14
Magne S Sivertsen, Erik H Strøm, Kim M A Endre, Øystein K Jørstad
A 72-year-old woman experienced anterior ischemic optic neuropathy in her left eye. The funduscopic and fluorescein angiographic findings were strongly suggestive of giant cell arteritis. Temporal artery biopsy revealed extensive calcification in the vessel wall consistent with calciphylaxis. This unusual disorder should be considered in the differential diagnosis of anterior ischemic optic neuropathy, particularly the arteritic form.
October 6, 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28986994/microvasculature-dropout-detected-by-the-optical-coherence-tomography-angiography-in-nonarteritic-anterior-ischemic-optic-neuropathy
#15
Yi Song, Jing-Yu Min, Lei Mao, Yuan-Yuan Gong
OBJECTIVE: To investigate microcirculation characteristics of peripapillary superficial retina and optic disc in eyes with nonarteritic anterior ischemic optic neuropathy (NAION) using optical coherence tomography angiography (OCTA). METHODS: Forty-one eyes of 30 NAION patients and 30 eyes of 30 normal subjects were evaluated with OCTA (AngioVue, Optovue). The whole vessel density, inside disc vessel density, peripapillary vessel density, and vessel densities based on the sectorial division in the nerve head mode peripapillary superficial retina and RPC mode optic disc were measured respectively...
October 7, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28985584/strategies-to-prevent-ischemic-optic-neuropathy-following-major-spine-surgery-a-narrative-review
#16
REVIEW
Wilson Fandino
Postoperative vision loss following a major spine operation is a rare but life-changing event. Most of reports have been linked to ischemic optic neuropathy, and patients undergoing surgery for scoliosis correction or posterior lumbar fusion seem to be at the highest risk. Despite that some key risk factors have been identified, much of the pathophysiology still remain unknown. In fact, whereas only a minority of patients at high risk will present this complication, others with similar risk factors undergoing different procedures may not develop it at all...
October 3, 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28944200/optical-coherence-tomography-angiography-of-optic-disc-perfusion-in-non-arteritic-anterior-ischemic-optic-neuropathy
#17
Jia-Wen Ling, Xue Yin, Qian-Yi Lu, Yi-Yi Chen, Pei-Rong Lu
AIM: To compare the optic disc blood flow of non-arteritic ischemic optic neuropathy (NAION) eyes with normal eyes. METHODS: The optic disc blood flow densities of diagnosed non-acute phase NAION eyes (21 eyes, 14 individuals) and normal eyes (19 eyes, 12 individuals) were detected via Optovue optical coherence tomography angiography (OCTA). The optic disc blood flow was measured via Image J software. Correlations between optic disc perfusion and visual function variables were assessed by linear regression analysis...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28944153/sequential-development-of-non-arteritic-anterior-ischemic-optic-neuropathy-in-a-patient-on-hemodialysis
#18
Mukesh Jain, Renuka Srinivasan, K Ramesh Babu, M Swapnil Parchand
Purpose: Non-arteritic anterior ischemic optic neuropathy (NA-AION) is typically a disorder of patients 50 years and older predisposed to the vascular and structural optic disc risk factors. We present an interesting case of sequential development of NA-AION in a 45-year-old patient with end-stage renal disease undergoing hemodialysis. Methods: Observational case report. Results: A 45-year-old female on hemodialysis for chronic renal failure complained of sequential acute onset sudden painless gross diminution of vision in right eye followed by the left eye...
2017: GMS Ophthalmology Cases
https://www.readbyqxmd.com/read/28942764/ocular-manifestations-of-obstructive-sleep-apnea
#19
Matthew Santos, R Jeffrey Hofmann
STUDY OBJECTIVES: Obstructive sleep apnea (OSA) incurs a host of systemic side effects. The eyes are particularly susceptible to both mechanical and vascular sequelae of the disease. This paper outlines the ocular manifestations of sleep apnea. The authors hope to increase awareness of the ocular complications of this common disorder and increase communication and co-management between eye-care providers and sleep specialists alike. METHODS: Data were collected from PubMed and the Brown University Library Collection...
September 20, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28931297/-intracranial-pressure-evaluation-by-ophthalmologist
#20
J Čmelo, R Illéš, J Šteňo
The value of ICT is important in diagnosis of the diseases of the eye and orbit Methods for direct measurement of intracranial pressure (ICT) are exact, but they are invasive and there is some risk of infection and damage of the tissue. Currently there are 2 valid indirect methods of mesurement of IKT. Digital Ophthalmodynamometry (D-ODM) and Transcranial Doppler ultrasonography (TDU). D-ODM is a non-invasive method for measuring of the Pulsating Venous Pressure (VPT). We can measure VPT by the pulse phenomena...
2017: Ceská a Slovenská Oftalmologie
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