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https://www.readbyqxmd.com/read/29142487/preliminary-investigations-showing-venous-thromboembolism-recurrence-in-patients-with-residual-venous-obstruction-in-singaporean-population
#1
Ashish Anil Sule, Chaozer Er, Claudia Y X Chong, Han Xin Chin, Tay Jam Chin
This study aims to determine the association of residual venous obstruction (RVO) with recurrent venous thromboembolism (VTE). A retrospective cohort study was conducted determining if RVO on ultrasonography is associated with recurrent VTE in a Singaporean population. The subjects were identified from the Vascular Diagnostic Laboratory patients' record of Tan Tock Seng Hospital (TTSH), Singapore between 2008 and 2013. All the patients included had RVO after 3 months of anticoagulation. Data such as age, gender, race, thrombus location, etiology, history of malignancy, thrombophilia screen, treatment duration, and follow-up were recorded for analysis...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/29136662/protective-effect-of-metformin-against-retinal-vein-occlusions-in-diabetes-mellitus-a-nationwide-population-based-study
#2
Tai-Chi Lin, De-Kuang Hwang, Chih-Chien Hsu, Chi-Hsien Peng, Mong-Lien Wang, Shih-Hwa Chiou, Shih-Jen Chen
Previous studies have found that metformin can reduce cardiovascular risk, but its association with retinal vein occlusion (RVO) is unknown. In this population-based cohort study using the Taiwan National Health Insurance Research Database (NHIRD), we demonstrated the protective effect of metformin against RVO in diabetes mellitus (DM) and explored the incidence rate and factors associated with RVO development in general and diabetic populations. One million patients were randomly selected from the registry files of the NHIRD, and all their claims data were collected for the 1996-2011 period...
2017: PloS One
https://www.readbyqxmd.com/read/29134820/pharmacokinetics-of-intravitreal-anti-vegf-drugs-in-vitrectomized-versus-non-vitrectomized-eyes
#3
Magdalena Edington, Julie Connolly, Ngaihang Victor Chong
Introduction The review aims to discuss effects of vitrectomy on pharmacokinetics of anti-vascular endothelial growth factor (anti-VEGF) agents, and attempt to provide treatment guidance. Areas Covered An Embase search was conducted using the terms 'anti-VEGF', 'pegaptanib', 'ranibizumab', 'bevacizumab', 'aflibercept', 'pharmacokinetics', 'half-life', 'clearance', 'metabolism', 'vitrectomy', 'vitrectomized'. Published data regarding the pharmacokinetic properties of the above drugs and the effect of vitrectomy in animal and human eyes was reviewed...
November 14, 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/29119239/safety-and-efficacy-of-dexamethasone-intravitreal-implant-for-treatment-of-macular-edema-secondary-to-retinal-vein-occlusion-in-chinese-patients-randomized-sham-controlled-multicenter-study
#4
Xiaoxin Li, Ningli Wang, Xiaoling Liang, Gezhi Xu, Xiao-Yan Li, Jenny Jiao, Jean Lou, Yehia Hashad
PURPOSE: The purpose of this study was to evaluate the safety and efficacy of dexamethasone intravitreal implant 0.7 mg (DEX) for treatment of macular edema associated with retinal vein occlusion (RVO). METHODS: This study was a six-month, randomized, double-masked, sham-controlled, multicenter, phase 3 clinical trial with a 2-month open-label study extension. Patients with branch or central RVO received DEX (n = 129) or sham procedure (n = 130) in the study eye at baseline; all patients who met re-treatment criteria received DEX at month 6...
November 8, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29099501/efficacy-and-timing-of-adjunctive-therapy-in-the-anti-vegf-treatment-regimen-for-macular-oedema-in-retinal-vein-occlusion-12-month-real-world-result
#5
P L Lip, P Cikatricis, A Sarmad, E M Damato, R Chavan, A Mitra, S Elsherbiny, Y Yang, B Mushtaq
PurposeVarious combination treatment regimens have been tried to improve the short-term efficacy of intravitreal monotherapy for the treatment of macular oedema (MO) secondary to retinal vein occlusion (RVO). Our study introduces the RandOL protocol (Ranibizumab and Ozurdex with Laser photocoagulation) of initial anti-VEGF therapy, controlling recurrent non-ischaemic MO with an intravitreal steroid and applying laser therapy to non-perfused retina. We describe our 12-month follow-up experience on timing for adjunctive therapy and real-world effectiveness and safety data...
November 3, 2017: Eye
https://www.readbyqxmd.com/read/29098298/photocoagulation-of-the-retinal-nonperfusion-area-prevents-the-expression-of-the-vascular-endothelial-growth-factor-in-an-animal-model
#6
Makoto Gozawa, Yoshihiro Takamura, Seiji Miyake, Takehiro Matsumura, Masakazu Morioka, Yutaka Yamada, Masaru Inatani
Purpose: The purpose of this study was to evaluate whether photocoagulation of the retinal nonperfusion area suppresses ocular vascular endothelial growth factor (VEGF) expression in a rabbit retinal vein occlusion (RVO) model. Methods: The retinas of pigmented rabbits were made ischemic by a laser on the main branch of retinal veins following intravenous injection of Rose Bengal. The eyes were enucleated before treatment and at 1, 7, and 14 days after laser occlusion...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29074010/the-role-of-occult-hypertension-in-retinal-vein-occlusions-and-diabetic-retinopathy
#7
Nataly Pesin, Efrem D Mandelcorn, Tina Felfeli, Richard I Ogilvie, Michael H Brent
OBJECTIVE: The aim of the study was to investigate whether individuals who develop retinal vein occlusion (RVO) or sudden-onset activity in otherwise quiescent diabetic retinopathy (DR) and those who have normal blood pressure (BP) or controlled hypertension according to their family physician show evidence of occult hypertension on 24-hour BP monitoring. METHODS: Patients with a new-onset RVO or DR that led to vitreous hemorrhage after a period of quiescence were identified...
November 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29040227/testosterone-supplementation-and-retinal-vascular-disease
#8
Vaidehi S Dedania, David N Zacks, Wei Pan, Brian L VanderBeek
PURPOSE: To determine whether testosterone supplementation is associated with retinal artery occlusion (RAO) or retinal vein occlusion (RVO). METHODS: Retrospective matched cohort study using data from a large national U.S. insurance database. The testosterone cohort consisted of all male patients who filled a prescription for testosterone from 2000 to 2013. Five controls were matched on age (±3 years), sex, race, and similar time in plan (±3 months) for every exposed patient...
October 13, 2017: Retina
https://www.readbyqxmd.com/read/29031036/-the-role-of-chemotherapy-in-the-treatment-of-low-grade-gliomas
#9
R Lakomý, T Kazda, A Poprach, P Pospíšil, R Jančálek, P Šlampa
BACKGROUND: The standard postsurgical options for low-grade gliomas include watchful waiting or radiotherapy depending on the risk factors for recurrence. The use of chemotherapy for the treatment of this disease is generally controversial, although the recently published results of the first of two large randomized phase III clinical trials (RTOG 9802 a EORTC 22033-26033), focusing on the evaluation of chemotherapy for the upfront treatment of newly diagnosed low-grade gliomas, are reassuring in this respect...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/29031035/-controversy-in-the-postoperative-treatment-of-low-grade-gliomas
#10
T Kazda, R Lakomý, A Poprach, P Pospíšil, R Jančálek, P Šlampa
BACKGROUND: The optimal treatment for low-grade gliomas remains controversial. Neurosurgery, radiotherapy, and chemotherapy are the main treatment options. Despite advances in oncology, there are still a lot of uncertainties, and the optimal sequences, combinations, and timings of these procedures have not yet been optimized. It is still unclear whether temozolomide can replace effective, but toxic PCV chemotherapy (procarbazine, lomustine, vincristine) and whether temozolomide can be used upfront alone instead of radiotherapy alone...
2017: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
https://www.readbyqxmd.com/read/29020423/noninvasive-high-resolution-functional-macular-imaging-in-subjects-with-retinal-vein-occlusion
#11
Thalmon R Campagnoli, Gábor Márk Somfai, Jing Tian, Delia Cabrera DeBuc, William E Smiddy
BACKGROUND AND OBJECTIVES: Several imaging modalities have been developed to characterize ischemia inherent in retinal vascular diseases. This study aims to predict the impact and to better establish the mechanisms of visual deterioration. A high-resolution functional imaging device is used, yielding quantitative data for macular blood flow and capillary network features in healthy eyes and in eyes with central retinal vein occlusion (CRVO) or branch retinal vein occlusion (BRVO). PATIENTS AND METHODS: This prospective, cross-sectional, comparative case series measured blood flow velocities (BFVs) and noninvasive capillary perfusion maps (nCPMs) in macular vessels in patients with BRVO/CRVO and in healthy controls using the Retinal Function Imager (RFI; Optical Imaging, Rehovot, Israel)...
October 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28973374/effects-of-intravitreal-dexamethasone-implants-on-retinal-oxygen-saturation-vessel-diameter-and-retrobulbar-blood-flow-velocity-in-me-secondary-to-rvo
#12
Katharina Eibenberger, Leopold Schmetterer, Sandra Rezar-Dreindl, Piotr Wozniak, Reinhard Told, Georgios Mylonas, Christoph Krall, Ursula Schmidt-Erfurth, Stefan Sacu
Purpose: To investigate the effects of intravitreal 0.7 mg dexamethasone implants (Ozurdex) on arterial and venous oxygen saturation, retinal vessel diameter, and retrobulbar blood flow velocity in patients with macular edema (ME) due to retinal vein occlusion (RVO). Methods: This prospective, nonrandomized clinical trial included 40 eyes of 40 patients with ME due to RVO. Measurements of arterial and venous oxygen saturation and retinal vessel diameters were performed using the Dynamic Vessel Analyzer...
October 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28971631/intravitreal-ziv-aflibercept-clinical-effects-and-economic-impact
#13
Sumit Randhir Singh, Avantika Dogra, Michael Stewart, Taraprasad Das, Jay Chhablani
During the past decade, drugs that inhibit the actions of vascular endothelial growth factor (VEGF) have become standard-of-care treatment for a variety of chorioretinal vascular conditions. The off-label, intravitreal use of ziv-aflibercept (Zaltrap) has provided clinicians with an additional cost-effective drug. The commercial preparation of ziv-aflibercept contains the same aflibercept (VEGF-trap) molecule as Eylea but has a much higher osmolarity (1000 mOsm/kg vs 300 mOsm/kg). Initial concerns regarding cytotoxicity and long-term safety of intravitreal ziv-aflibercept have been largely negated after a series of publications failed to identify adverse ocular and systemic side effects...
October 3, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28931763/reversible-retinal-vessel-closure-from-vegf-induced-leukocyte-plugging
#14
Yuanyuan Liu, Jikui Shen, Seth D Fortmann, Jiangxia Wang, Dietmar Vestweber, Peter A Campochiaro
Clinical trials in patients with macular edema due to diabetic retinopathy or retinal vein occlusion (RVO) have shown that suppression of VEGF not only improves macular edema, but also reopens closed retinal vessels, prevents progression of vessel closure, and improves retinopathy. In this study, we show the molecular basis for those clinical observations. Increased retinal levels of VEGF in mice cause plugging of retinal vessels with leukocytes, vessel closure, and hypoxia. Suppression of VEGF reduces leukocyte plugging, causing reperfusion of closed vessels...
September 21, 2017: JCI Insight
https://www.readbyqxmd.com/read/28913517/intravitreal-injection-of-ziv-aflibercept-in-the-treatment-of-choroidal-and-retinal-vascular-diseases
#15
Kamran HodjatJalali, Shiva Mehravaran, Hooshang Faghihi, Hassan Hashemi, Pegah Kazemi, Hadith Rastad
PURPOSE: To investigate the short-term outcomes after intravitreal injection of ziv-aflibercept in the treatment of choroidal and retinal vascular diseases. METHODS: Thirty-four eyes of 29 patients with age-related macular degeneration (AMD), diabetic retinopathy, and retinal vein occlusion (RVO) received a single dose intravitreal injection of 0.05 ml ziv-aflibercept (1.25 mg). Visual acuity, spectral domain optical coherence tomography (SD-OCT) activity, and possible side effects were assessed before and at 1 week and 1 month after the intervention...
September 2017: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/28904960/mystery-of-retinal-vein-occlusion-vasoactivity-of-the-vein-and-possible-involvement-of-endothelin-1
#16
REVIEW
Teruyo Kida
Retinal vein occlusion (RVO) is a common vascular disease of retina; however, the pathomechanism leading to RVO is not yet clear. In general, increasing age, hypertension, arteriosclerosis, diabetes mellitus, dyslipidemia, cardiovascular disorder, and cerebral stroke are systemic risk factors of RVO. However, RVO often occur in the unilateral eye and sometimes develop in young subjects who have no arteriosclerosis. In addition, RVO show different variations on the degrees of severity; some RVO are resolved without any treatment and others develop vision-threatening complications such as macular edema, combined retinal artery occlusion, vitreous hemorrhage, and glaucoma...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28898259/association-between-retinal-vein-occlusion-and-an-increased-risk-of-acute-myocardial-infarction-a-nationwide-population-based-follow-up-study
#17
Yu-Yen Chen, Shwu-Jiuan Sheu, Hsiao-Yun Hu, Dachen Chu, Pesus Chou
OBJECTIVE: To investigate a possible association between retinal vein occlusion (RVO) and an increased risk of developing acute myocardial infarction (AMI). DESIGN: A population-based retrospective cohort study using the entire population of the Taiwan National Health Insurance Research Database (NHIRD) from 1st January, 2001 to 31st December, 2013. METHODS: A total of 37921 subjects with RVO were enrolled in the RVO group, and 113763 subjects without RVO were enrolled in the comparison group...
2017: PloS One
https://www.readbyqxmd.com/read/28895589/instant-on-paper-protein-digestion-during-blood-spot-sampling
#18
Øystein Skjærvø, Cecilie Rosting, Trine Grønhaug Halvorsen, Léon Reubsaet
A concept integrating sampling and protein digestion is introduced here combining fast and simple fabrication by wax printing on filter paper with trypsin immobilized polymer beads. The paper reactors showed promising results with a high degree of protein digestion within fifty minutes in model protein mixtures as well as in human blood. The model protein mixture was used for the evaluation of performance both with and without a reduction and alkylation step. The paper reactors without reduction and alkylation showed between 46% and 75% protein sequence coverage and between five and 20 high confidence peptides (one and five zero missed cleavage peptides, respectively)...
October 9, 2017: Analyst
https://www.readbyqxmd.com/read/28865424/prevalence-pattern-and-risk-factors-of-retinal-vein-occlusion-in-an-elderly-population-in-nepal-the-bhaktapur-retina-study
#19
Raba Thapa, Sanyam Bajimaya, Govinda Paudyal, Shankar Khanal, Stevie Tan, Suman S Thapa, Ger van Rens
BACKGROUND: This study aims to explore the prevalence, pattern and risk factors of retinal vein occlusion (RVO) in an elderly population of Nepal. METHOD: One thousand eight hundred sixty subjects of age 60 years and above were enrolled in a population-based, cross-sectional study. Detailed history, visual acuity, anterior segment and posterior segment examinations were done. Blood pressure, non-fasting blood sugar, body mass index and abdominal girth were measured...
September 2, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28837790/disorganization-of-the-retinal-inner-layers-as-a-predictor-of-visual-acuity-in-eyes-with-macular-edema-secondary-to-vein-occlusion
#20
MULTICENTER STUDY
Michael Mimouni, Or Segev, Dalia Dori, Noa Geffen, Victor Flores, Ori Segal
PURPOSE: To determine whether spectral-domain optical coherence tomography (SD-OCT) disorganization of the retinal inner layers (DRIL) is predictive of best-corrected visual acuity (BCVA) in retinal vein occlusion macular edema (RVO-ME). DESIGN: Retrospective cohort study. METHODS: Setting: Two tertiary centers. PATIENTS: Treatment-naïve RVO-ME receiving monthly intravitreal bevacizumab. OBSERVATION PROCEDURES: Spectral-domain optical coherence tomography (SD-OCT) images from baseline, 4-month, and 8-month visits...
October 2017: American Journal of Ophthalmology
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