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Vascular occlusions

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https://www.readbyqxmd.com/read/29028736/superficial-and-deep-capillary-ischemia-as-a-presenting-sign-of-retinal-vasculopathy-with-cerebral-leukoencephalopathy-and-systemic-manifestations
#1
Aaron Nagiel, Robert A Lalane, Joanna C Jen, Allan E Kreiger
PURPOSE: The aim of this study was to investigate the presenting sign of retinal vasculopathy with cerebral leukoencephalopathy and systemic manifestations, a rare autosomal dominant condition caused by mutations in the TREX1 gene, and to explore the potential efficacy of bevacizumab in preventing capillary occlusions. METHODS: Observational case report with the use of ultra-widefield fluorescein angiography, optical coherence tomography, and optical coherence tomography angiography...
October 12, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/29025226/a-histopathologic-diagnosis-of-vascular-occlusion-after-injection-of-hyaluronic-acid-filler-findings-of-intravascular-foreign-body-and-skin-necrosis
#2
Seiichi Maruyama
Before injecting hyaluronic acid (HA) filler into high-risk zones of the face, considerable caution must be exercised, including careful selection of the most appropriate filler, volume, and injection technique. Rare but severe adverse events have occurred during and after injection of HA filler in or around the periorbital region, such as skin necrosis and blindness. In the present case, involving a 57-year-old woman, approximately 0.1 mL of HA was injected into each side of the glabella to minimize wrinkles...
October 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29023196/home-parenteral-nutrition-vascular-access-and-related-complications
#3
Martyn Dibb, Simon Lal
Patients with chronic intestinal failure are dependent on parenteral nutrition (PN) to maintain health and preserve life. Maintaining safe vascular access is vital to prevent life-threatening complications such as catheter-related bloodstream infection or central venous occlusion. Dedicated central venous catheters with rigorous catheter care aseptic protocols are vital in obtaining good long-term outcomes that allow continuation of PN over many years. Good catheter care requires an experienced multidisciplinary team using appropriate vascular devices, trained to identify and aggressively treat catheter-related bloodstream infections, catheter occlusions, and catheter-related thrombosis...
October 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/29020435/blood-pressure-targets-for-the-treatment-of-people-with-hypertension-and-cardiovascular-disease
#4
REVIEW
Luis Carlos Saiz, Javier Gorricho, Javier Garjón, Mª Concepción Celaya, Lourdes Muruzábal, Mª Del Mar Malón, Rodolfo Montoya, Antonio López
BACKGROUND: Hypertension is a prominent preventable cause of premature morbidity and mortality. People with hypertension and established cardiovascular disease are at particularly high risk, so reducing blood pressure below standard targets may be beneficial. This strategy could reduce cardiovascular mortality and morbidity but could also increase adverse events. The optimal blood pressure target in people with hypertension and established cardiovascular disease remains unknown. OBJECTIVES: To determine if 'lower' blood pressure targets (≤ 135/85 mmHg) are associated with reduction in mortality and morbidity as compared with 'standard' blood pressure targets (≤ 140 to 160/ 90 to 100 mmHg) in the treatment of people with hypertension and a history of cardiovascular disease (myocardial infarction, angina, stroke, peripheral vascular occlusive disease)...
October 11, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29020423/noninvasive-high-resolution-functional-macular-imaging-in-subjects-with-retinal-vein-occlusion
#5
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/29018760/management-of-macular-edema-due-to-central-retinal-vein-occlusion-the-role-of-aflibercept
#6
REVIEW
William Rhoades, Drew Dickson, Quan Dong Nguyen, Diana V Do
Central retinal vein occlusion (CRVO) can cause vision loss. The pathogenesis of CRVO involves a thrombus formation leading to increased retinal capillary pressure, increased vascular permeability, and possibly retinal neovascularization. Vision loss due to CRVO is commonly caused by macular edema. Multiple treatment modalities have been used to treat macular edema. Currently, the most common therapy used is intravitreal inhibition of vascular endothelial growth factor (VEGF). The three most widely used agents are aflibercept, bevacizumab, and ranibizumab and they are effective at blocking VEGF...
April 2017: Taiwan Journal of Ophthalmology
https://www.readbyqxmd.com/read/29018024/circulatory-dynamics-during-pulmonary-vein-isolation-using-the-second-generation-cryoballoon
#7
Takatsugu Kajiyama, Shinsuke Miyazaki, Tomonori Watanabe, Kazuya Yamao, Shigeki Kusa, Miyako Igarashi, Hiroaki Nakamura, Hitoshi Hachiya, Yoshito Iesaka
BACKGROUND: Circulatory dynamics change during pulmonary vein (PV) isolation using cryoballoons. This study sought to investigate the circulatory dynamics during cryoballoon-based PV isolation procedures and the contributing factors. METHODS AND RESULTS: This study retrospectively included 35 atrial fibrillation patients who underwent PV isolation with 28-mm second-generation cryoballoons and single 3-minute freeze techniques. Blood pressures were continuously monitored via arterial lines...
October 10, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29017609/effects-of-intra-arterial-transplantation-of-adipose-derived-stem-cells-on-the-expression-of-netrin-1-and-its-receptor-dcc-in-the-peri-infarct-cortex-after-experimental-stroke
#8
Huan Huang, Fan Lin, Jingjing Jiang, Yan Chen, Ainong Mei, Pengli Zhu
BACKGROUND: Stem cell transplantation has been documented to promote functional recovery in animal models of stroke; however, the underlying mechanisms are not yet fully understood. As netrin-1 and its receptor deleted in colorectal cancer (DCC) are important regulators in neuronal and vascular activities, the present study attempted to explore whether netrin-1 and DCC are involved in the neuroprotection of stem cell-based therapies in a rat ischemic stroke model. METHODS: Adult male Sprague-Dawley rats were subjected to a transient middle cerebral artery occlusion (MCAO) and subsequently received an intra-arterial injection of 2 × 10(6) PKH26-labeled adipose-derived stem cells (ADSCs) or saline 24 h later...
October 10, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29017156/the-missing-link-in-the-pathophysiology-of-vascular-cognitive-impairment-design-of-the-heart-brain-study
#9
Astrid M Hooghiemstra, Anne Suzanne Bertens, Anna E Leeuwis, Esther E Bron, Michiel L Bots, Hans-Peter Brunner-La Rocca, Anton J M de Craen, Rob J van der Geest, Jacoba P Greving, L Jaap Kappelle, Wiro J Niessen, Robert J van Oostenbrugge, Matthias J P van Osch, Albert de Roos, Albert C van Rossum, Geert Jan Biessels, Mark A van Buchem, Mat J A P Daemen, Wiesje M van der Flier
BACKGROUND: Hemodynamic balance in the heart-brain axis is increasingly recognized as a crucial factor in maintaining functional and structural integrity of the brain and thereby cognitive functioning. Patients with heart failure (HF), carotid occlusive disease (COD), and vascular cognitive impairment (VCI) present themselves with complaints attributed to specific parts of the heart-brain axis, but hemodynamic changes often go beyond the part of the axis for which they primarily seek medical advice...
October 10, 2017: Cerebrovascular Diseases Extra
https://www.readbyqxmd.com/read/29016749/differential-enos-signalling-by-platelet-subpopulations-regulates-adhesion-and-aggregation
#10
Aneta Radziwon-Balicka, Gabriela Lesyk, Valentina Back, Teresa Fong, Erica L Loredo-Calderon, Bin Dong, Haitham El-Sikhry, Ahmed A El-Sherbani, Ayman El-Kadi, Stephen Ogg, Arno Siraki, John M Seubert, Maria Jose Santos-Martinez, Marek W Radomski, Carlos A Velazquez-Martinez, Ian R Winship, Paul Jurasz
Aims: In addition to maintaining hemostasis, circulating blood platelets are the cellular culprits that form occlusive thrombi in arteries and veins. Compared to blood leukocytes, which exist as functionally distinct subtypes, platelets are considered to be relatively simple cell fragments that form vascular system plugs without a differentially regulated cellular response. Hence, investigation into platelet subpopulations with distinct functional roles in hemostasis/thrombosis has been limited...
September 4, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28994885/management-of-combat-related-facial-injuries
#11
Ali Mardassi, Senda Turki, Hajer Mbarek, Amani Hachicha, Ghassen Chebbi, Sonia Benzarti, Maher Abouda
INTRODUCTION: Combat-related facial injuries involve various lesions of the mouth, the eye sockets and the facial bones. The goal of this study is to precise the particularities of these affections and their therapeutic management. METHODS: A retrospective study was performed about 56 cases of combat-related facial injuries over a period of 5 years (2010 - 2014). RESULTS: Our study included 56 male patients with an average age of 29 years (20-37)...
December 2016: La Tunisie Médicale
https://www.readbyqxmd.com/read/28993757/painful-and-prolonged-muscle-cramps-following-insulin-injections-in-a-patient-with-type-2-diabetes-mellitus-revisiting-the-1992-duke-case
#12
Rami A Ballout, Asma Arabi
A 56-year-old middle-eastern male with a long-standing history of poorly controlled type 2 diabetes mellitus presented to us complaining of severely painful bilateral upper and lower extremity cramps occurring shortly after his rapid-acting insulin analog injection(s). The cramps had started 6 months ago and have been occurring intermittently in non-predictable episodes since then. He had otherwise never experienced any insulin-related adverse reaction(s) before. His cramps are very painful and debilitating, interfering with his daily activities and placing him in a state of constant fear/anxiety of re-experiencing them...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28992623/salvianolic-acid-b-ameliorates-cognitive-deficits-through-igf-1-akt-pathway-in-rats-with-vascular-dementia
#13
Xiaowei Ma, Weiwei Xu, Zhongxia Zhang, Na Liu, Jie Yang, Mingwei Wang, Yanyong Wang
BackgroundAims: Salvianolic acid B (SalB) is a natural polyphenolic compound enriched in Salvia miltiorrhiza Bunge. Our study was designed to explore the role of Sal B on cognitive impairment in vascular dementia (VD) model rats, as well as its possible molecular mechanisms. METHODS: Rats were randomly divided into four groups (n = 15 for each group): Control group, Sal B group (normal Sprague Dawley rats treated with Sal B), VD group and VD + Sal B group. The VD group rats were established by permanent bilateral common carotid artery occlusion (BCCAO)...
October 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28989574/protection-of-the-brain-through-supplementation-with-larch-arabinogalactan-in-a-rat-model-of-vascular-dementia
#14
Sun Ha Lim, Jongwon Lee
BACKGROUND/OBJECTIVES: Vascular dementia (VaD) caused by reduced blood supply to the brain manifests as white matter lesions accompanying demyelination and glial activation. We previously showed that arabinoxylan consisting of arabinose and xylose, and arabinose itself attenuated white matter injury in a rat model of VaD. Here, we investigated whether larch arabinogalactan (LAG) consisting of arabinose and galactose could also reduce white matter injury. MATERIALS/METHODS: We used a rat model of bilateral common carotid artery occlusion (BCCAO), in which the bilateral common carotid arteries were exposed and ligated permanently with silk sutures...
October 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/28988309/durable-benefit-of-particle-occlusion-of-systemic-to-pulmonary-collaterals-in-select-patients-after-superior-cavopulmonary-connection
#15
Michael L O'Byrne, David N Schidlow
Systemic to pulmonary arterial collaterals (SPC) are commonly found in patients undergoing staged operative palliation for single ventricle heart disease. Occlusion of SPC as part of pre-Fontan catheterization has been shown to improve hemodynamics acutely. Anecdotally, the effect of this intervention appears to be transient, and to our knowledge there is no data supporting its durability in these patients. Between 1/1/2016 and 5/1/2017, 24 children underwent Glenn operations at our institution. Of these, 3 patients had signs and symptoms deteriorating clinical status suggestive of volume overload in the period between their Glenn operation and Fontan completion, prompting heart catheterization...
October 7, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28987880/heparin-functionalized-polymer-graft-surface-eluting-mk2-inhibitory-peptide-to-improve-hemocompatibility-and-anti-neointimal-activity
#16
Yunki Lee, Phuong Le Thi, Gyeung Mi Seon, Seung Bae Ryu, Colleen M Brophy, YongTae Kim, Jong-Chul Park, Ki Dong Park, Joyce Cheung-Flynn, Hak-Joon Sung
The leading cause of synthetic graft failure includes thrombotic occlusion and intimal hyperplasia at the site of vascular anastomosis. Herein, we report a co-immobilization strategy of heparin and potent anti-neointimal drug (Mitogen Activated Protein Kinase II inhibitory peptide; MK2i) by using a tyrosinase-catalyzed oxidative reaction for preventing thrombotic occlusion and neointimal formation of synthetic vascular grafts. The binding of heparin-tyramine polymer (HT) onto the polycarprolactone (PCL) surface enhanced blood compatibility with significantly reduced protein absorption (64...
October 4, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28987435/acute-limb-ischemia-an-emergency-medicine-approach
#17
REVIEW
Jamie R Santistevan
Acute limb ischemia is a medical emergency with significant morbidity and mortality. Rapid diagnosis is required because it is a time-sensitive condition. Timely treatment is necessary to restore blood flow to the extremity and prevent complications. The differential diagnosis of acute limb ischemia is broad. Classification of severity of acute limb ischemia is based on clinical variables. A suspicion of acute ischemia based on history and physical examination warrants heparin administration and vascular surgery consultation...
November 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/28987197/neuropathology-of-cerebrovascular-diseases
#18
Isidro Ferrer, Noemi Vidal
The chapter describes the epidemiology of cerebrovascular diseases, anatomy of the cerebral blood vessels, pathophysiology of ischemia, hypoxia, hypoxemia, anemic hypoxia, histotoxic hypoxia, carbon monoxide damage, hyperoxid brain damage and decompression sickness, and selective cell and regional vulnerability; diseases of the blood vessels including atherosclerosis, hypertensive angiopathy, small vessel disease, inflammatory vascular diseases, cerebral amyloid angiopathies, CADASIL, CARASIL and other diseases that can lead to cerebrovascular occlusion; intracranial and intraspinal aneurysms and vascular malformations; hematologic disorders that can cause cerebral infarct or hemorrhage; brain ischemic damage; and spontaneous intracranial bleeding...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28986862/beyond-the-embolus-do-not-miss-diffusion-abnormalities-of-ischaemic-and-non-ischaemic-neurological-disease
#19
REVIEW
Vivek Yedavalli, Eric M Nyberg, Daniel S Chow, Ashesh A Thaker
Given the rapid evolution and technological advances in the diagnosis and treatment of acute ischaemic stroke (AIS), including the proliferation of comprehensive stroke centres and increasing emphasis on interventional stroke therapies, the need for prompt recognition of stroke due to acute large vessel occlusion has received significant attention in the recent literature. Diffusion-weighted imaging (DWI) is the gold standard for the diagnosis of acute ischaemic stroke, as images appear positive within minutes of ischaemic injury, and a high signal-to-noise ratio enables even punctate infarcts to be readily detected...
October 6, 2017: Insights Into Imaging
https://www.readbyqxmd.com/read/28986690/the-role-of-shear-stress-on-cutaneous-microvascular-endothelial-function-in-humans
#20
Gary J Hodges, Desmond G Stewart, Paul J Davison, Stephen S Cheung
PURPOSE: Previous studies suggest that exercise and heat stress improve cutaneous endothelial function, caused by increases in shear stress. However, as vasodilatation in the skin is primarily a thermogenic phenomenon, we investigated if shear stress alone without increases in skin temperature that occur with exercise and heat stress increases endothelial function. We examined the hypothesis that repeated bouts of brief occlusion would improve cutaneous endothelial function via shear stress-dependent mechanisms...
October 6, 2017: European Journal of Applied Physiology
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