Correlation between Intravoxel Incoherent Motion Magnetic Resonance Imaging Derived Metrics and Serum Soluble CD40 Ligand Level in an Embolic Canine Stroke Model.

Correlation between Intravoxel Incoherent Motion Magnetic Resonance Imaging Derived Metrics and Serum Soluble CD40 Ligand Level in an Embolic Canine Stroke Model. Korean J Radiol. 2017 Sep-Oct;18(5):835-843 Authors: Xu XQ, Wu CJ, Lu SS, Gao QQ, Zu QQ, Liu XL, Shi HB, Liu S Abstract OBJECTIVE: To determine the relationship between intravoxel incoherent motion (IVIM) imaging derived quantitative metrics and serum soluble CD40 ligand (sCD40L) level in an embolic canine stroke model. MATERIALS AND METHODS: A middle cerebral artery occlusion model was established in 24 beagle dogs. Experimental dogs were divided into low- and high-sCD40L group according to serum sCD40L level at 4.5 hours after establishing the model. IVIM imaging was scanned at 4.5 hours after model establishment using 10 b values ranging from 0 to 900 s/mm(2). Quantitative metrics diffusion coefficient (D), pseudodiffusion coefficient (D(*)), and perfusion fraction (f) of ischemic lesions were calculated. Quantitative metrics of ischemic lesions were normalized by contralateral hemisphere using the following formula: normalized D = Dstroke / Dcontralateral. Differences in IVIM metrics between the low- and high-sCD40L groups were compared using t test. Pearson's correlation analyses were performed to determine the relationship between IVIM metrics and serum sCD40L level. RESULTS: The high-sCD40L group showed significantly lower f and normalized f values than the low-sCD40L group (f,...
Source: Korean J Radiol - Category: Radiology Authors: Tags: Korean J Radiol Source Type: research

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A number of studies revealed that patients with venous thromboembolism are at increased risk of developing subsequent arterial ischemic events, such as myocardial infarction or stroke.1 –8 Prevention of such arterial ischemic events in addition to treating venous thromboembolismmay warrant combination therapy with antiplatelets and anticoagulants. Recent studies suggested an increased risk of arterial ischemic events in cancer patients.9,10 Accurate identification of patients at increased risk for arterial ischemic events during the course of anticoagulation for venous thromboembolismmay help to select those who woul...
Source: The American Journal of Medicine - Category: General Medicine Authors: Tags: Clinical Research Study Source Type: research
Use of a NobleStitch™ EL Device for PFO Closure. Surg Technol Int. 2018 Jun 01;32:219-223 Authors: de Cillis E, Acquaviva T, D'Alessandro P, Bortone AS Abstract Cryptogenic stroke is the final diagnosis in almost 40% of ischemic acute cerebrovascular events. There is currently no definitive clinical evidence that percutaneous closure of patent foramen ovale (PFO) can prevent the recurrence of stroke or transient ischemic attack (TIA). Identification of the causes of neurologic ischemic syndromes is essential for any strategy intended to prevent the catastrophic consequences of cerebral infarction. Sin...
Source: Surgical Technology International - Category: Surgery Tags: Surg Technol Int Source Type: research
Background and Purpose—Experimental models of cerebral ischemia demonstrate that the decrease in the caveolin-1 membrane protein results in an increase in endothelial permeability. Because this phenomenon is responsible for hemorrhagic transformation (HT) after cerebral ischemia, we aimed to determine whether caveolin-1 levels may predict bleeding after recombinant tissue-type plasminogen activator (r-tPA) administration in patients with acute stroke.Methods—We studied 133 patients with a first hemispheric stroke treated with r-tPA within 4.5 hours of symptom onset. HT was evaluated and classified on cranial co...
Source: Stroke - Category: Neurology Authors: Tags: Biomarkers, Endothelium/Vascular Type/Nitric Oxide, Blood-Brain Barrier, Ischemic Stroke Brief Reports Source Type: research
Abbott Laboratories’ Amplatzer Amulet left atrial appendage (LAA) occlusion device has been shown at one year to reduce stroke by 57% as compared to the predicted stroke risk. The data also showed it was able to make this reduction without the need for lifetime blood thinners.  The Abbott Park IL-based company released the data at EuroPCR, the annual meeting of the European Association of Percutaneous Cardiovascular Interventions in Paris, and simultaneously published in EuroIntervention. More than 1,078 patients suffering from atrial fibrillation (Afib) were in the study with one-year-follow up. “The Amul...
Source: MDDI - Category: Medical Devices Authors: Tags: Cardiovascular Source Type: news
Authors: Bidot S, Biotti D Abstract Transient monocular blindness is an acute episode of ischemic origin in which one eye has profound visual loss, followed by full recovery within one hour. Transient monocular blindness most often occurs in the setting of retinal ischemia secondary to carotid embolism, but other mechanisms have been reported, including thrombosis (most often in the setting of giant cell arteritis), hemodynamic disorders (secondary to severe carotid stenosis) or vasospasm. Transient monocular blindness is considered a transient ischemic attack originating in the carotid arteries and must benefit fr...
Source: Journal Francais d Ophtalmologie - Category: Opthalmology Tags: J Fr Ophtalmol Source Type: research
MindFrame Capture LP Revascularization Devices: Product Numbers: (a) REF 300010 (b) REF 300011 (c) REF 300012 (d) REF 300013 (e) REF 300014 (f) REF 300015 (g) REF 300016 (h) REF 300017 (i) REF 300018 Intended to restore blood flow by removing thrombus from a large intracranial vessel experiencing ischemic stroke within 8 hours of symptom onset.
Source: Medical Device Recalls - Category: Medical Devices Source Type: alerts
AbstractSuperb microvascular imaging (SMI) reduces motion artifacts significantly and allows visualization of low-velocity blood flow in vessels; thus, thrombi are clearly demonstrated compared to conventional B-mode and color Doppler imaging. Ultrasonographic images of the lower extremities of a 69-year-old woman with acute ischemic stroke complicated with deep vein thrombosis (DVT) are presented. Because SMI allows visualization of low-velocity blood flow, echo contrast between the thrombus and the surrounding flow makes it possible to clearly visualize the thrombus. SMI is a useful method to evaluate DVT, especially ear...
Source: Journal of Medical Ultrasonics - Category: Radiology Source Type: research
The risk of complications from thromboembolism is increased for patients with malignancy. Cancer-associated stroke is also a serious issue with regard to the management of patients with cancer because stroke incidence often causes disabilities that affect daily life and cancer treatment strategy.
Source: Journal of Stroke and Cerebrovascular Diseases - Category: Neurology Authors: Tags: Case Studies Source Type: research
Thrombus formation, albeit with partially different mechanisms, is the common denominator of adverse ischemic events in both coronary artery disease (CAD) and atrial fibrillation (AF) [1]. Accordingly, long-term oral antiplatelet therapy with aspirin, and oral anticoagulation (OAC) with either warfarin or a direct oral anticoagulant (DOAC), including dabigatran, rivaroxaban, apixaban, and edoxaban, have long been established as the standard treatments for the prevention of (recurrent) cardiac ischemic events and stroke, respectively [2].
Source: International Journal of Cardiology - Category: Cardiology Authors: Source Type: research
Abstract Acute mesenteric ischemia is a highly morbid affliction which requires urgent care. Acute mesenteric ischemia consists in an ischemia injury of the small bowel, secondary to vascular insufficiency, either occlusive (thrombosis, embolism, arterial, venous) or non-occlusive (low flow or vasospasm). Given that the superior mesenteric artery supplies the small bowel as well as the right part of the colon, any ischemic process involving the right colon should be considered an acute mesenteric ischemia until proven otherwise. Acute mesenteric ischemia should always be suspected in the setting of a sudden, unusu...
Source: Presse Medicale - Category: General Medicine Authors: Tags: Presse Med Source Type: research
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