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Vascular occlusion

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https://www.readbyqxmd.com/read/29222966/optimizing-functional-outcomes-in-mandibular-condyle-reconstruction-with-the-free-fibula-flap-using-computer-aided-design-and-manufacturing-technology
#1
Z-Hye Lee, Tomer Avraham, Casian Monaco, Ashish A Patel, David L Hirsch, Jamie P Levine
PURPOSE: Mandibular defects involving the condyle represent a complex reconstructive challenge for restoring proper function of the temporomandibular joint (TMJ) because it requires precise bone graft alignment for full restoration of joint function. The use of computer-aided design and manufacturing (CAD/CAM) technology can aid in accurate reconstruction of mandibular condyle defects with a vascularized free fibula flap without the need for additional adjuncts. The purpose of this study was to analyze clinical and functional outcomes after reconstruction of mandibular condyle defects using only a free fibula graft with the help of virtual surgery techniques...
November 15, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29222393/protect-proximal-balloon-occlusion-together-with-direct-thrombus-aspiration-during-stent-retriever-thrombectomy-evaluation-of-a-double-embolic-protection-approach-in-endovascular-stroke-treatment
#2
Christian Maegerlein, Sebastian Moench, Tobias Boeckh-Behrens, Manuel Lehm, Dennis M Hedderich, Maria Teresa Berndt, Silke Wunderlich, Claus Zimmer, Johannes Kaesmacher, Benjamin Friedrich
PURPOSE: Stent retriever-based mechanical thrombectomy (MT) for emergent large vessel occlusions (ELVO) is often complicated by thrombus fragmentation causing distal embolization and embolization to new vascular territories. Well-established embolic protection approaches include proximal flow arrest and distal aspiration techniques during stent retriever maneuvers. Aiming at the reduction of thrombus fragmentation during MT we evaluated a technical approach combining proximal balloon occlusion together with direct thrombus aspiration during MT: the PROTECT technique...
December 8, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29222291/evolving-treatment-paradigms-in-sickle-cell-disease
#3
REVIEW
Ramasamy Jagadeeswaran, Angela Rivers
Sickle cell disease (SCD) is an inheritable hemoglobinopathy characterized by polymerization of hemoglobin S in red blood cells resulting in chronic hemolytic anemia, vaso-occlusive painful crisis, and multiorgan damage. In SCD, an increased reactive oxygen species (ROS) generation occurs both inside the red blood cells and inside the vascular lumen, which augment hemolysis and cellular adhesion. This review discusses the evolving body of literature on the role of ROS in the pathophysiology of SCD as well as some emerging therapeutic approaches to SCD with a focus on the reduction of ROS...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29222244/cardiovascular-care-of-patients-with-chronic-myeloid-leukemia-cml-on-tyrosine-kinase-inhibitor-tki-therapy
#4
REVIEW
Mary C Barber, Michael J Mauro, Javid Moslehi
Cardiovascular (CV) health has emerged as an important consideration in patients with chronic myeloid leukemia (CML) because of improved prognosis. Indeed, the success of BCR-ABL1 tyrosine kinase inhibitors (TKIs) has increased the focus on survivorship and late toxicity in oncological care. Survivorship issues in this population include CV disease prevention, given its prevalence in the general population. The introduction of BCR-ABL1 TKIs represented a unique concept of indefinite cancer therapy, only recently evolving to include "treatment-free remission...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29221836/efficacy-versus-complications-in-arterial-thrombolysis
#5
H P Ebben, M V van Burink, V Jongkind, D E Mouwen, J Udding, W Wisselink, J K Kievit, A M Wiersema, K K Yeung
BACKGROUND: Acute peripheral arterial occlusions threaten life and limb. Thrombolysis is an established, minimally invasive alternative treatment for surgical thromboembolectomy. Yet, there is no consensus regarding an optimal thrombolysis protocol and current knowledge is largely based on studies from the 1990's. This study reviews a contemporary cohort of patients treated with thrombolysis and aims to evaluate the treatment results and to identify possible predictors for outcome and (bleeding) complications...
December 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29220060/upper-limb-ischaemia-a-south-african-single-centre-experience
#6
Tinus du Toit, Kathryn Manning, Nadraj G Naidoo
OBJECTIVE: The aims of this study were to report on our experience with upper limb ischaemia (ULI), to define the pattern and distribution of disease, describe key demographic features and report on conventional clinical outcomes. METHODS: This was a single-centre, retrospective, descriptive study. All patients (n = 64) who underwent a surgical intervention for ULI over a 12-year study period were included. Findings were analysed and compared with the current literature...
December 8, 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/29218615/advanced-ct-for-diagnosis-of-seizure-related-stroke-mimics
#7
Friederike Austein, Monika Huhndorf, Johannes Meyne, Helmut Laufs, Olav Jansen, Thomas Lindner
BACKGROUND AND PURPOSE: It is assumed that up to 30 % of clinically diagnosed acute ischaemic strokes (AIS) are actually stroke mimics (SM). Our aim was to evaluate the usefulness of advanced CT including CT angiography (CTA) and CT perfusion (CTP) findings when distinguishing AIS from seizure-related SM. METHODS: Over a 22-month period data were gathered of patients who presented to our stroke centre with AIS-like symptoms and were examined immediately with an advanced CT, analysed and evaluated by two experienced neuroradiologists who preferred SM rather than AIS...
December 7, 2017: European Radiology
https://www.readbyqxmd.com/read/29217442/posterior-approach-for-revascularization-in-blunt-popliteal-vessel-injury
#8
Vladimir Makaloski, Arno Stellmes, Doerte Wyss, Salome Weiss, Daniel Becker, Thomas R Wyss, Juerg Schmidli
BACKGROUND: Popliteal vessel injuries are associated with traumatic knee injury often requiring emergency revascularization. Medial and posterior approaches to the popliteal space have been proposed. This study evaluates the outcome of patients treated for traumatic popliteal vessel injuries via a posterior approach. METHODS: Consecutive patients with traumatic vascular injuries in the popliteal segments II and III undergoing surgical repair via a posterior approach between October 2008 and December 2016 were analyzed...
December 4, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29214780/mismatch-between-tof-mr-angiography-and-ct-angiography-of-the-middle-cerebral-artery-may-be-a-critical-sign-in-cerebrovascular-dynamics
#9
Keiji Igase, Michiya Igase, Ichiro Matsubara, Kazuhiko Sadamoto
PURPOSE: Although time-of-flight (TOF)-magnetic resonance angiography (MRA) can clearly depict intracranial arteries, the arterial flow of middle cerebral artery (MCA) is occasionally not detected. We evaluated this phenomenon with reference to cerebrovascular dynamics. MATERIALS AND METHODS: Seventeen patients with suspected occlusion of MCA or internal carotid artery on TOF-MRA were enrolled. All patients underwent CT angiography (CTA) and quantitative cerebral blood flow (CBF) examination for measurement of resting CBF and cerebrovascular reactivity (CVR)...
January 2018: Yonsei Medical Journal
https://www.readbyqxmd.com/read/29212745/factors-associated-with-focal-computed-tomographic-perfusion-abnormalities-in-supratentorial-transient-ischemic-attacks
#10
Ivo A Meyer, Carlo W Cereda, Pamela N Correia, Jean-Baptiste Zerlauth, Francesco Puccinelli, David C Rotzinger, Michael Amiguet, Philippe Maeder, Reto A Meuli, Patrik Michel
BACKGROUND AND PURPOSE: Computed tomographic perfusion (CTP) is useful in diagnosis of patients with transient focal neurological symptoms. In acute imaging of patients with a suspected transient ischemic attack (TIA), it remains unclear which patients develop focal perfusion abnormalities (FPA), that is, hypoperfusion or hyperperfusion. We aimed at determining independent factors associated with FPA in patients with supratentorial TIAs. METHODS: We prospectively collected consecutive patients with supratentorial TIAs defined by the traditional time-based definition who underwent CTP within 24 hours of symptom onset...
December 6, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29211372/-thromboangiitis-obliterans-notions-for-practice
#11
Luca Calanca, Adriano Alatri, Caroline Krieger, Jean-Marc Corpataux, Lucia Mazzolai
Thromboangiitis obliterans is an occlusive vasculopathy affecting small- and medium-size arteries. It can result in severe ischemic status. Thrombophlebitis can be associated. The exact etiology has still to be elucidated. Smoking is the main contributing factor. Diagnosis is based on clinic and paraclinic context, as well as exclusion of other vascular pathologies. Its management consists in complete smoking cessation and instauration of vasodilator treatment. Revascularization is an option that has to be evaluated on a case by case basis...
December 6, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29209435/diseases-potentially-related-to-flammer-syndrome
#12
REVIEW
Katarzyna Konieczka, Carl Erb
Flammer syndrome (FS) is a prevalent and mostly benign condition. Subjects with FS seem to have a good life expectancy. Nevertheless, FS subjects are at increased risk for certain diseases, mainly when they are challenged by psychological stress or other stimuli such as coldness. FS is related to ocular diseases, such as normal-tension glaucoma, retinitis pigmentosa, central serous chorioretinopathy, optic nerve compartment syndrome, Leber's hereditary optic neuropathy, arterial or venous occlusions in the retina, and choroid and optic nerve head, despite the absence of classical vascular risk factors...
December 2017: EPMA Journal
https://www.readbyqxmd.com/read/29207167/prazosin-protects-myocardial-cells-against-anoxia-reoxygenation-injury-via-the-extracellular-signal%C3%A2-regulated-kinase-signaling-pathway
#13
Lixin Wang, Yan Xue, Hao Ma, Haiyan Shi, Ling Wang, Xiaozheng Cui
Ischemic heart disease (including coronary arterial atherosclerosis, or vascular cavity stenosis or occlusion) remains the leading cause of disease‑associated mortality worldwide. Prazosin, a receptor blocker of postsynaptic adrenaline, is essential in expanding peripheral arteries, which decreases peripheral vascular resistance, and regulates anti‑hypertensive action. However, the mechanisms underlying the effects of prazosin have not been fully elucidated. The aim of the present study was to investigate the protective effects of prazosin on myocardial cells against anoxia‑reoxygenation injury in a mouse model...
November 28, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29204993/update-on-the-use-of-anti-vegf-intravitreal-therapies-for-retinal-vein-occulsions
#14
Yi Jiang, William F Mieler
The use of anti-vascular endothelial growth factor (VEGF) therapy in ophthalmology has profoundly changed our management and treatment of conditions such as cystoid macular edema, diabetic macular edema, choroidal neovascularization, and other proliferative retinopathies. Although initially used for the treatment of choroidal neovascularization in neovascular age-related macular degeneration, their application has spread rapidly for other indications as their outcomes have often outperformed previously existing treatments...
November 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/29204306/facial-palsy-after-embolization-of-dural-arteriovenous-fistula-a-case-report-and-literature-review
#15
Luana Antunes Maranha Gatto, Fernando Saurin, Gelson Luis Koppe, Zeferino Demartini
Background: Dural arteriovenous fistulas (DAVF) are unusual intracranial vascular malformations consisting of anomalous connections between meningeal arteries and dural sinuses or the veins that pass through them. They have variable clinical presentation and prognosis, which depend on their location and venous hemodynamics. Treatment is based on the closure of the abnormal connections, which is usually conducted via arterial and/or transvenous endovascular techniques. Case Description: We present a male patient who complained of headaches and left-sided pulsatile tinnitus due to DAVF from the external carotid artery branches draining directly into the ipsilateral sigmoid sinus...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29203235/sensibility-and-specificity-of-laser-speckle-contrast-imaging-according-to-endo-pat-index-in-type-1-diabetes
#16
Alessandra S de M Matheus, Maria de Fátima Bevilacqua da Matta, Eliete Leão Silva Clemente, Maria de Lourdes Guimarães Rodrigues, Débora Cristina Torres Valença, Marília B Gomes
OBJECTIVES: To find out an normality value for microvascular response (physiological and pharmacological) assessed through laser speckle contrast imaging (LSCI) based on Endo-PAT, which identifies the ones with Endothelial Dysfunction (ED) in patients with Type 1 Diabetes (T1D). METHODS: Patients with T1D, aged ≥12years underwent a clinical-epidemiological questionnaire. Fasting blood samples were obtained (lipid profile, glycemic control and levels of C-reactive protein)...
December 1, 2017: Microvascular Research
https://www.readbyqxmd.com/read/29203042/-treatment-of-radiation-induced-iliofemoral-arterial-complications-with-groin-radionecrosis
#17
J-M Fichelle
Long-term iliofemoral complications induced by radiation include vascular (arterial and venous) lesions, nervous lesions and soft tissue loss that can be cutaneous and subcutaneous and potentially lead to radionecrosis with vessel exposure. We present five cases of groin radionecrosis. There were three men and two women (age 30-73 years). Radiotherapy had been delivered 15 years earlier in three cases, and 2 years earlier in two cases. Symptoms were intermittent claudication (n=1), critical ischemia (n=1), and septic hemorrhage (n=1)...
December 2017: Journal de Médecine Vasculaire
https://www.readbyqxmd.com/read/29202466/loss-of-pleckstrin-2-reverts-lethality-and-vascular-occlusions-in-jak2v617f-positive-myeloproliferative-neoplasms
#18
Baobing Zhao, Yang Mei, Lan Cao, Jingxin Zhang, Ronen Sumagin, Jing Yang, Juehua Gao, Matthew J Schipma, Yanfeng Wang, Chelsea Thorsheim, Liang Zhao, Timothy Stalker, Brady Stein, Qiang Jeremy Wen, John D Crispino, Charles S Abrams, Peng Ji
V617F driver mutation of JAK2 is the leading cause of the Philadelphia-chromosome-negative myeloproliferative neoplasms (MPNs). Although thrombosis is a leading cause of mortality and morbidity in MPNs, the mechanisms underlying their pathogenesis are unclear. Here, we identified pleckstrin-2 (Plek2) as a downstream target of the JAK2/STAT5 pathway in erythroid and myeloid cells, and showed that it is upregulated in a JAK2V617F-positive MPN mouse model and in patients with MPNs. Loss of Plek2 ameliorated JAK2V617F-induced myeloproliferative phenotypes including erythrocytosis, neutrophilia, thrombocytosis, and splenomegaly, thereby reverting the widespread vascular occlusions and lethality in JAK2V617F-knockin mice...
November 20, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29201553/proinflammatory-cytokines-correlate-with-early-exercise-attenuating-anxiety-like-behavior-after-cerebral-ischemia
#19
Qi Zhang, Jingjun Zhang, Yuzhong Yan, Pengyue Zhang, Wei Zhang, Rong Xia
Background and Objective: Stroke may cause neuropsychiatric problems, which have negative effects on cognitive functions and behavior. Exercise plays an important role in reducing the occurrence and development of stroke, the concrete mechanism is not fully clarified. In this study, we attempted to determine whether early treadmill exercise attenuates anxiety-like behavior by regulation of inflammation after brain ischemia. Method: We subjected adult male rats to middle cerebral artery occlusion (MCAO) for 90 min and trained rats started to run on a treadmill from postoperative day 1 to day 14...
November 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29200907/chronic-cerebral-hypoperfusion-and-plasticity-of-the-posterior-cerebral-artery-following-permanent-bilateral-common-carotid-artery-occlusion
#20
Kyung-Ok Cho, Seul-Ki Kim, Seong Yun Kim
Vascular dementia (VaD) is a group of heterogeneous diseases with the common feature of cerebral hypoperfusion. To identify key factors contributing to VaD pathophysiology, we performed a detailed comparison of Wistar and Sprague-Dawley (SD) rats subjected to permanent bilateral common carotid artery occlusion (BCCAo). Eight-week old male Wistar and SD rats underwent BCCAo, followed by a reference memory test using a five-radial arm maze with tactile cues. Continuous monitoring of cerebral blood flow (CBF) was performed with a laser Doppler perfusion imaging (LDPI) system...
November 2017: Korean Journal of Physiology & Pharmacology
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