90,542 results match your criteria artery occlusion


Combined Central Retinal Arterial and Venous Occlusions due to Leukemic Infiltration.

Retin Cases Brief Rep 2021 Sep 19. Epub 2021 Sep 19.

Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium Department of Pathology, Antwerp University Hospital, Edegem, Belgium Department of Radiology, Antwerp University Hospital, Edegem, Belgium Faculty of Health Sciences, University of Antwerp, Edegem, Belgium Name and address for correspondence: Vincent M. De La Porte, M.D. E-mail: Telephone: +32 3 821 4428, Address: Department of Ophthalmology, Antwerp University Hospital, 2650 Edegem, Belgium.

Purpose: To report combined central arterial and venous occlusions secondary to bilateral leukemic interfascicular optic nerve infiltration in a 56-year-old man. This was the sole presentation of a relapse in T/Myeloid mixed-phenotype acute leukemia after 5 months of remission.

Methods: Case report with clinical photography. Read More

View Article and Full-Text PDF
September 2021

Endovascular treatment of vertebro-vertebral arteriovenous fistula in neurofibromatosis type I: A report of two cases and literature review with a focus on endovascular treatment.

Clin Neurol Neurosurg 2021 Jul 14;207:106806. Epub 2021 Jul 14.

Department of Neurosurgery, Changhai Hospital, Second Military Medical University, Shanghai, China. Electronic address:

Vertebro-Vertebral arteriovenous fistula (VV-AVF) associated with neurofibromatosis Type I (NF-1) is rare. We presented two female NF-1 patients with a diagnosis of VV-AVF treated with endovascular approach. The fistula was completely obliterated with balloon assisted embolization and covered stent separately and VA patency was preserved in both cases. Read More

View Article and Full-Text PDF

A Pilot Behavioural and Neuroimaging Investigation on Photothrombotic Stroke Models in Rhesus Monkeys.

J Neurosci Methods 2021 Jul 19:109291. Epub 2021 Jul 19.

National Resource Center for Non-Human Primates, Kunming Primate Research Center, and National Research Facility for Phenotypic & Genetic Analysis of Model Animals (Primate Facility), Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China. Electronic address:

Background: Ischemic stroke leads to a long-term disability in humans and no efficient clinical therapy exists to date. The middle cerebral artery occlusion (MCAO) model in non-human primates has shown to be of value for translational stroke research. New method In the current study, a photothrombotic (PT) stroke model was established in rhesus monkeys with either a proximal or distal segment of middle cerebral artery (MCA) thrombosis. Read More

View Article and Full-Text PDF

Design, Synthesis, and Biological Evaluation of Organic Nitrite (NO) Donors as Potential Anticerebral Ischemia Agents.

J Med Chem 2021 Jul 22. Epub 2021 Jul 22.

State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University, Nanjing 210009, P.R. China.

The treatment of ischemic stroke (IS) remains a big challenge in clinics, and it is urgently needed to develop novel, safe, and effective medicines against IS. Here, we report the design, synthesis, and biological evaluation of organic NO donors as potential agents for the treatment of IS. The representative compound was able to slowly generate low concentrations of NO by reaction with a thiol-containing nucleophile, and the NO was selectively converted into NO under ischemic/hypoxia conditions to protect primary rat neurons from oxygen-glucose deprivation and recovery (OGD/R)-induced cytotoxicity by enhancing the Nrf2 signaling and activating the NO/cGMP/PKG pathway. Read More

View Article and Full-Text PDF

Ligands of the Neuropeptide Y Y2 Receptors as a Potential Multitarget Therapeutic Approach for the Protection of the Neurovascular Unit Against Acute Ischemia/Reperfusion: View from the Perspective of the Laboratory Bench.

Transl Stroke Res 2021 Jul 22. Epub 2021 Jul 22.

Laboratory of Experimental and Clinical Neurosurgery, Mossakowski Medical Research Institute Polish Academy of Sciences, A. Pawińskiego Str. 5, 02-106, Warsaw, Poland.

Ischemic stroke is the third leading cause of death and disability worldwide, with no available satisfactory prevention or treatment approach. The current treatment is limited to the use of "reperfusion methods," i.e. Read More

View Article and Full-Text PDF

Quercetin attenuates ischemia reperfusion injury by protecting the blood-brain barrier through Sirt1 in MCAO rats.

J Asian Nat Prod Res 2021 Jul 22:1-12. Epub 2021 Jul 22.

Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.

The purpose of the present study was to examine the protective action and mechanisms of quercetin on the blood-brain barrier (BBB) in rats subjected to transient middle cerebral artery occlusion (tMCAO) and reperfusion. Quercetin (10, 30, 50 mg/kg) was intraperitoneally administered at the onset of reperfusion. The results showed that quercetin significantly reduced cerebral infarct volume, neurological deficit, BBB permeability and ROS generation via Sirt1/Nrf2/HO-1 signaling pathway. Read More

View Article and Full-Text PDF

Urgent repair of postinfarct ventricular septal rupture with ECPELLA support: A case report.

J Card Surg 2021 Jul 21. Epub 2021 Jul 21.

Department of Thoracic and Cardiovascular Surgery, Hirosaki University School of Medicine, Hirosaki, Aomori, Japan.

A 74-year-old woman developed inferior myocardial infarction due to right coronary artery occlusion and underwent percutaneous coronary intervention. Two days later, echocardiography revealed ventricular septal rupture, and Impella CP was inserted to avoid emergency surgery. However, the patient's hemodynamics deteriorated rapidly, necessitating additional venoarterial extracorporeal membranous oxygenation support with concomitant Impella support (ECPELLA). Read More

View Article and Full-Text PDF

Investigating the relationship between the severity of coronary artery disease and inflammatory factors of MHR, PHR, NHR, and IL-25.

Med J Islam Repub Iran 2021 1;35:85. Epub 2021 Jul 1.

Department of Cardiology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.

Coronary artery disease (CAD), as a most common cause of death, is mainly caused by atherosclerosis. Due to the role of inflammation in the process of atherosclerosis, in the present study, the relationship between the severity of coronary artery disease and inflammatory factors of monocyte to HDL-C ratio (MHR), platelet-to-HDL-C ratio (PHR), neutrophil to HDL-C ratio (NHR), and IL-25 was investigated. In this cross-sectional study, 64 patients with diagnosis of coronary artery disease who were undergoing angiography in Farshchian heart center in Hamadan were studied. Read More

View Article and Full-Text PDF

Combination of Rescue Stenting and Antiplatelet Infusion Improved Outcomes for Acute Intracranial Atherosclerosis-Related Large-Vessel Occlusion.

Front Neurol 2021 5;12:608270. Epub 2021 Jul 5.

Department of Radiology, Seoul National University Bundang Hospital, Seongnam, South Korea.

Intracranial atherosclerosis-related large-vessel occlusion caused by thrombo-occlusion (ICAS-LVO) has been regarded an important reason for refractoriness to mechanical thrombectomy (MT). To achieve better outcomes for ICAS-LVO, different endovascular strategies should be explored. We aimed to investigate an optimal endovascular strategy for ICAS-LVO. Read More

View Article and Full-Text PDF

Fluid shear stress regulates placental growth factor expression via heme oxygenase 1 and iron.

Sci Rep 2021 Jul 21;11(1):14912. Epub 2021 Jul 21.

Department of Physiological Sciences, Oklahoma State University, 264 McElroy Hall, Stillwater, OK, 74078, USA.

Increased fluid shear stress (FSS) is a key initiating stimulus for arteriogenesis, the outward remodeling of collateral arterioles in response to upstream occlusion. Placental growth factor (PLGF) is an important arteriogenic mediator. We previously showed that elevated FSS increases PLGF in a reactive oxygen species (ROS)-dependent fashion both in vitro and ex vivo. Read More

View Article and Full-Text PDF

Myocardial infarctions, subtypes and coronary atherosclerosis in SLE: a case-control study.

Lupus Sci Med 2021 07;8(1)

Unit of Rheumatology, Karolinska University Hospital, Stockholm, Sweden.

Objective: Patients with SLE have increased risk of myocardial infarction (MI). Few studies have investigated the characteristics of SLE-related MIs. We compared characteristics of and risk factors for MI between SLE patients with MI (MI-SLE), MI patients without SLE (MI-non-SLE) and SLE patients without MI (non-MI-SLE) to understand underlying mechanisms. Read More

View Article and Full-Text PDF

Reasons for Not Performing Mechanical Thrombectomy: A Population-Based Study of Stroke Codes.

Stroke 2021 Jul 22:STROKEAHA120032648. Epub 2021 Jul 22.

Department of Neurology, Hospital de la Santa Creu i Sant Pau, Biomedical Research Institute Sant Pau, Universitat Autònoma de Barcelona (Department of Medicine), Spain (D.G.-A., A.M.-D., L.P.-S., R.D.-M., P.C.-R., J.M.-F.).

Background And Purpose: Mechanical thrombectomy (MT) is effective for acute ischemic stroke (AIS) in selected patients with large intracranial vessel occlusion. A minority of patients with AIS receive MT. We aimed to describe the reasons for excluding patients with AIS for MT. Read More

View Article and Full-Text PDF

Treat or Retreat: Reasons for Deferral of Endovascular Therapy for Large Vessel Occlusion Stroke.

Stroke 2021 Jul 22:STROKEAHA121034361. Epub 2021 Jul 22.

Department of Neurosurgery, Barrow Neurological Institute, Phoenix, AZ (A.P.J.).

View Article and Full-Text PDF

Association of Admission NIHSS Score with Infarct Core Volume and Target Mismatch of Infarct Core/Penumbra Volume on CT Perfusion in Acute Ischaemic Stroke.

Cerebrovasc Dis 2021 Jul 21:1-7. Epub 2021 Jul 21.

Department of Neurology and Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China.

Introduction: Neurological impairment is associated with collateral status in acute ischaemic stroke (AIS). We aimed to validate the association between admission National Institutes of Health Stroke Scale (aNIHSS) score and infarct core volume (ICV) and target infarct core/penumbra volume mismatch (TMM) on CT perfusion (CTP) in AIS patients.

Methods: Patients with acute middle cerebral artery or internal carotid artery occlusion from 2011 to 2020 were included. Read More

View Article and Full-Text PDF

Ephedrine alleviates middle cerebral artery occlusion-induced neurological deficits and hippocampal neuronal damage in rats by activating PI3K/AKT signaling pathway.

Bioengineered 2021 Dec;12(1):4136-4149

Encephalopathy, Beijing University of Traditional Chinese Medicine, Dong Zhi Men Hospital, Tongzhou Hospital Area, Beijing, China.

Inflammation and oxidative stress are crucial in ischemic stroke. Ephedrine (EPH) has been proven to have anti-inflammatory and anti-oxidative stress effects. The present study analyzes whether EPH possessed neuroprotective effects and explored the underlying mechanisms of EPH based on an experimental model of middle cerebral artery occlusion (MCAO). Read More

View Article and Full-Text PDF
December 2021

Engeletin protects against cerebral ischemia/reperfusion injury by modulating the VEGF/vasohibin and Ang-1/Tie-2 pathways.

Braz J Med Biol Res 2021 16;54(10):e11028. Epub 2021 Jul 16.

Department of Pharmacology, Binzhou Medical University, Yantai, Shandong, China.

Engeletin is a natural derivative of Smilax glabra rhizomilax that exhibits anti-inflammatory activity and suppresses lipid peroxidation. In the present study, we sought to elucidate the mechanistic basis for the neuroprotective and pro-angiogenic activity of engeltin in a human umbilical vein endothelial cells (HUVECs) oxygen-glucose deprivation and reoxygenation (OGD/R) model system and a middle cerebral artery occlusion (MCAO) rat model of cerebral ischemia and reperfusion injury. These analyses revealed that engeletin (10, 20, or 40 mg/kg) was able to reduce the infarct volume, increase cerebral blood flow, improve neurological function, and bolster the expression of vascular endothelial growth factor (VEGF), vasohibin-2 (Vash-2), angiopoietin-1 (Ang-1), phosphorylated human angiopoietin receptor tyrosine kinase 2 (p-Tie2), and platelet endothelial cell adhesion molecule-1 (PECAM-1/CD31) in MCAO rats. Read More

View Article and Full-Text PDF

Glycocalyx is critical for blood-brain barrier integrity by suppressing caveolin1-dependent endothelial transcytosis following ischemic stroke.

Brain Pathol 2021 Jul 19:e13006. Epub 2021 Jul 19.

Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou, China.

The breakdown of the blood-brain barrier (BBB) is related to the occurrence and deterioration of neurological dysfunction in ischemic stroke, which leads to the extravasation of blood-borne substances, resulting in vasogenic edema and increased mortality. However, a limited understanding of the molecular mechanisms that control the restrictive properties of the BBB hinders the manipulation of the BBB in disease and treatment. Here, we found that the glycocalyx (GCX) is a critical factor in the regulation of brain endothelial barrier integrity. Read More

View Article and Full-Text PDF

Commentary on "Endovascular Therapy for Stroke Due to Basilar-Artery Occlusion".

Authors:
Kornelia Kreiser

Cardiovasc Intervent Radiol 2021 Jul 20. Epub 2021 Jul 20.

Departement of Radiology/Neuroradiology, RKU - Universitäts- und Rehabilitationskliniken Ulm gGmbH, Oberer Eselsberg 45, 89081, Ulm, Germany.

View Article and Full-Text PDF

Combined Approach to Stroke Thrombectomy Using a Novel Short Flexible Aspiration Catheter with a Stent Retriever : Preliminary Clinical Experience.

Clin Neuroradiol 2021 Jul 20. Epub 2021 Jul 20.

IDI-Radiology, University Hospital Dr Josep Trueta, Girona, Spain.

Background: Large-bore aspiration catheters enabling greater flow rates and suction force for mechanical thrombectomy might improve outcomes in patients with stroke secondary to large-vessel occlusion. Complete or near-complete reperfusion after a single thrombectomy pass (first-pass effect) is associated with improved clinical outcomes. We assessed the efficacy and safety of novel MIVI Q™ aspiration catheters in combination with stent-retriever devices. Read More

View Article and Full-Text PDF

Abdominal Pain Caused by Occlusion of the Celiac Trunk and Superior Mesenteric Artery in Addition to Irritable Bowel Syndrome: Case Series and Literature Review.

Cureus 2021 Jun 17;13(6):e15729. Epub 2021 Jun 17.

Medicine, Qatar University, Doha, QAT.

Irritable bowel syndrome (IBS) is a benign condition of the gastrointestinal tract causing abdominal pain, bloating, diarrhea, and/or constipation. Symptoms of IBS usually improve on passing flatus and defecation. There is no known identifiable underlying pathology; however, several risk factors are known to contribute to the development of IBS, which include a stressful lifestyle and certain foods such as bread, coffee, alcohol, pasta, and chocolates. Read More

View Article and Full-Text PDF

Black Bamboo Rhizome Extract Improves Cognitive Dysfunction by Upregulating the Expression of Hippocampal BDNF and CREB in Rats with Cerebral Ischaemia-Reperfusion Injury.

Neuropsychiatr Dis Treat 2021 12;17:2257-2267. Epub 2021 Jul 12.

Department of Anatomy, Hunan University of Medicine, Hunan, People's Republic of China.

Introduction: The study aimed to explore the effects of treatment with black bamboo rhizome extracts on learning and memory and determine the underlying mechanisms in rats with cerebral ischaemia-reperfusion injury.

Methods: Sprague-Dawley rats were randomly divided into the following four groups: control, middle cerebral artery occlusion (MCAO), low-dose drug, and high-dose drug groups. Rats underwent MCAO using a suture method before drug treatment. Read More

View Article and Full-Text PDF

ENDOVASCULAR MANAGEMENT OF INTRACRANIAL ANEURYSMS ON DISTAL ARTERIAL BRANCHES: ILLUSTRATIVE CASE SERIES AND LITERATURE RETROSPECTION.

Acta Clin Croat 2020 Dec;59(4):712-720

1Department of Neurosurgery, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia; 2University of Applied Health Sciences, Zagreb, Croatia; 3Josip Juraj Strossmayer University of Osijek, Faculty of Medicine, Osijek, Croatia; 4Josip Juraj Strossmayer University of Osijek, Faculty of Dental Medicine and Health, Osijek, Croatia; 5Department of Radiology, Sestre milosrdnice University Hospital Centre, Zagreb, Croatia.

Intracranial aneurysms located on distal arterial branches are sporadic and scarce. They account for 2%-7% of the middle cerebral artery and 0.7%-2. Read More

View Article and Full-Text PDF
December 2020

Endovascular Therapy for Acute Ischemic Stroke in Patients With Prestroke Disability.

J Am Heart Assoc 2021 Jul 21:e020783. Epub 2021 Jul 21.

Department of Neurosurgery Hyogo College of Medicine Nishinomiya Japan.

Background Outcomes after stroke as a result of large-vessel occlusion in patients with prestroke disability were compared between endovascular therapy (EVT) and medical management. Methods and Results Of 2420 patients with acute stroke with large-vessel occlusion in a prospective, multicenter, nationwide registry in Japan, patients with prestroke modified Rankin Scale scores 2 to 4 with occlusion of the internal carotid artery, or M1 of the middle cerebral artery were analyzed. The primary effectiveness outcome was the favorable outcome, defined as return to at least the prestroke modified Rankin Scale score at 3 months. Read More

View Article and Full-Text PDF

Comparison of Long-Term Angiographic Results of Wide-Necked Intracranial Aneurysms : Endovascular Treatment with Single-Microcatheter Coiling, Double-Microcatheter Coiling, and Stent-Assisted Coiling.

J Korean Neurosurg Soc 2021 Jul 22. Epub 2021 Jul 22.

Department of Neurosurgery, Hallym University Sacred Heart Hospital, Anyang, Korea.

Objective: Endovascular treatment of intracranial aneurysms is challenging in case of wide-necked aneurysms because coils are prone to herniate into the parent artery, causing thromboembolic events or vessel occlusion. This study aims to compare long-term angiographic results of wide-necked aneurysms treated by stent-assisted, double-microcatheter, or single-microcatheter groups.

Methods: Between January 2003 and October 2016, 108 aneurysms that were treated with endovascular coil embolization with a neck size wider than 4 mm and a follow-up period of more than 3 years were selected. Read More

View Article and Full-Text PDF

Neuroprotective effect and mechanism of butylphthalide after cerebral ischemia-reperfusion injury in rats.

Folia Neuropathol 2021 ;59(2):131-142

Department of ICU, The Seventh Affiliated Hospital, Sun Yat-sen University, China.

Introduction: To investigate the neuroprotective effect and mechanism of DL-3-n-butylphthalide (NBP) on the brain-derived neurotrophic factor (BDNF)/tyrosine kinase B (TrkB) and its downstream signalling pathway after cerebral ischemia/reperfusion injury (CIRI) in rats.

Material And Methods: The middle cerebral artery occlusion/reperfusion (MCAO/R) model was used. Reperfusion was performed 2 h after ischemia, and 20 mg/kg of NBP was intraperitoneally injected. Read More

View Article and Full-Text PDF
January 2021

MiR-125a-5p silencing inhibits cerebral ischemia-induced injury through targeting IGFBP3.

Folia Neuropathol 2021 ;59(2):121-130

Department of Neurology, Qingdao Central Hospital, Qingdao, Shandong, China.

Dysregulated microRNAs (miRNAs) are crucial regulators of cerebrovascular conditions, including ischemic stroke. Circulating miR-125a-5p is associated with ischemic stroke and may have clinical utility as an early diagnostic biomarker. This study conducted a series of experiments that were designed to elucidate the regulatory action of miR-125a-5p in ischemic brain injury and its underlying mechanisms. Read More

View Article and Full-Text PDF
January 2021

Stroke injury induced by distal middle cerebral artery occlusion is resistant to N-methyl-D-aspartate receptor antagonism in FVB/NJ mice.

Neuroreport 2021 Jul 19. Epub 2021 Jul 19.

Graduate Institute of Biomedical Sciences School of Medicine, China Medical University, Taichung Department of Primary Care Medicine, Taipei Medical University Hospital, Taipei Graduate Institute of Clinical Medical Science, China Medical University Department of Anesthesiology, China Medical University Hospital Drug Development Center, China Medical University Translational Medicine Research Center, China Medical University Hospital, Taichung, Taiwan.

Although N-methyl-D-aspartate receptor (NMDAR) antagonism has been shown to have a neuroprotective effect in many preclinical stroke models, the efficacy of this antiexcitotoxicity strategy in clinical trials in stroke patients has been disappointing. Interestingly, it has been reported that NMDAR antagonism is not neuroprotective in C57BL/6 mice subjected to distal middle cerebral artery occlusion (dMCAO), supporting the notion that whether these treatments are neuroprotective depends on the type of cerebral ischemia. However, because C57BL/6 mice are inherently resistant to excitotoxicity, the reported lack of neuroprotection could also be explained by the difference in the mouse strain studied rather than the stroke model used. Read More

View Article and Full-Text PDF

Neurovascular protection of salvianolic acid B and ginsenoside Rg1 combination against acute ischemic stroke in rats.

Neuroreport 2021 Jul 19. Epub 2021 Jul 19.

State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.

Ischemic stroke continues to be a major global health problem associated with considerable mortality and morbidity. Thus, it is still targeted by researchers for developing new strategies or drugs to alleviate the lesion of stroke. In the present study, both the permanent occlusion of the middle cerebral artery (MCAO) model and the restoration of cerebral blood flow after middle cerebral artery occlusion (CI/R) model were set up for evaluating the efficiency of salvianolic acid B and ginsenoside Rg1 combination (SalB-Rg1). Read More

View Article and Full-Text PDF

Decreased spasticity of Baishaoluoshi Decoction through the BDNF/TrKB-KCC2 pathway on poststroke spasticity rats.

Neuroreport 2021 Jul 19. Epub 2021 Jul 19.

Neurology Department, Hunan Academy of Chinese Medicine Affiliated Hospital Foreign Languages Department, School of Humanities and Management, Hunan University of Chinese Medicine Chinese Pharmacy Teaching and Research Department, College of Integrated Traditional Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan Hunan Key Laboratory of Prevention and Treatment in Cardiovascular Disease, College of Pharmacy, Guiyang University of Chinese Medicine, Guiyang, Guizhou, China.

Objective: K+-Cl- cotransporter-2 (KCC2), which primarily extrudes chloride in mature neurons, triggers hemiplegia limb spasticity after ischemic stroke by affecting neuronal excitability. Our previous study revealed that the Chinese herb Baishaoluoshi Decoction decreases hemiplegia limb spasticity in poststroke spasticity (PSS) patients. This study aimed at elucidating on the effects of Baishaoluoshi Decoction on the BDNF/TrKB-KCC2 pathway in PSS rat models. Read More

View Article and Full-Text PDF

Symptomatic subclavian steal syndrome: Report of four Moroccan cases and literature review.

Int J Surg Case Rep 2021 Jul 7;85:106173. Epub 2021 Jul 7.

Mohammed V University of Rabat, Morocco; Vascular Surgery Department, Ibn Sina University Hospital, 10104, Souissi, Rabat, Morocco.

Introduction: Subclavian steal syndrome (SSS) is the hemodynamic phenomenon of blood flow reversal in the vertebral artery due to significant stenosis or occlusion of the proximal ipsilateral subclavian artery.

Materials And Methods: Four patients with subclavian steal syndrome were treated in our center. Percutaneous radial approach was used for angioplasty, primary stenting of subclavian artery was performed, surgical techniques in particular carotid-subclavian bypass and carotid-subclavian transposition were used. Read More

View Article and Full-Text PDF