نتایج جستجو برای: microembolic signals

تعداد نتایج: 189578  

Journal: :Stroke 1999
V Kemény D W Droste S Hermes D G Nabavi G Schulte-Altedorneburg M Siebler E B Ringelstein

BACKGROUND AND PURPOSE Embolus detection using transcranial Doppler ultrasound is a useful method for the identification of active embolic sources in cerebrovascular diseases. Automated embolus detection systems have been developed to reduce the time of evaluation in long-term recordings and to provide more "objective" criteria. The purpose of this study was to evaluate the critical conditions ...

Journal: :Stroke 2014
Hubertus Fritz Georg Müller Aurélien Viaccoz Loraine Fisch Christophe Bonvin Karl-Olof Lovblad Osman Ratib Patrice Lalive Sabrina Pagano Nicolas Vuilleumier Jean-Pierre Willi Roman Sztajzel

BACKGROUND AND PURPOSE We investigated whether uptake of (18)fluoro-2-deoxy-d-glucose (18FDG) positron emission tomography-computed tomography (PET-CT) correlated to clinical symptoms and presence of microembolic signals (MES) detected by transcranial Doppler in patients with carotid stenosis. METHODS 18FDG-PET-CT and MES detection was performed in consecutive patients with 50% to 99% symptom...

Journal: :Case reports in neurological medicine 2016
Erol Akgul

In carotid artery stenting (CAS) procedures, distal embolism, periprocedural stent thrombosis, and 30-day stroke due to the plaque fragmentation and protrusion caused by stent implantation and balloon dilation are frequent complications. In this technical case report, a case is presented of extracranial carotid artery stenosis treated with a covered stent and subsequent implantation of a bare s...

Journal: :Stroke 2004
Oliver Wolf Peter Heider Marco Heinz Holger Poppert Dirk Sander Oliver Greil Wolfgang Weiss Marc Hanke Hans-Henning Eckstein

BACKGROUND AND PURPOSE Embolic events are a major cause for procedure-related strokes after carotid endarterectomy (CEA). Transcranial Doppler sonography can reveal embolic events as microembolic signals (MES) during CEA. MES during declamping and shunting are frequently detected. MES during shunting are rare and known to be correlated with the neurological outcome of the patient. In the presen...

Journal: :The Journal of pharmacology and experimental therapeutics 2017
Xinkang Wang Stan Kurowski Weizhen Wu Gino A Castriota Xueping Zhou Lin Chu Kenneth P Ellsworth Donald Chu Scott Edmondson Amjad Ali Patrick Andre Dietmar Seiffert Mark Erion David E Gutstein Zhu Chen

Factor XI (FXI) is an integral component of the intrinsic pathway of the coagulation cascade and plays a critical role in thrombus formation. Because its role in the pathogenesis of cerebral microembolic signals (MES) is unclear, this study used a potent and selective small molecule inhibitor of FXIa, compound 1, to assess the effect of FXI blockade in our recently established preclinical model...

Journal: :AJNR. American journal of neuroradiology 2004
Barbaros E Cil Erhan Akpinar Bora Peynircioglu Saruhan Cekirge

To our knowledge, the utility of coronary covered stents in the treatment of atherosclerotic carotid artery stenosis has not been defined in the English-language literature. Covered stents may prevent microembolic complications in select atherosclerotic carotid lesions, as they exclude the atherosclerotic lesion from the circulation by pressing the plaque against the vessel wall. Our early clin...

Journal: :basic and clinical neuroscience 0
amjad hashemi institute for advanced medical technologies (iamt), tehran university of medical sciences, tehran, iran. valiallah saba aja university of medical sciences, tehran, iran seyed navid resalat control and intelligent processing center of excellence, school of electrical and computer engineering, college of engineering, university of tehran, tehran, iran.

the objective of this study is development of driver’s sleepiness using visually evoked potentials (vep). vep computed from eeg signals from the visual cortex. we use the steady state veps (ssveps) that are one of the most important eeg signals used in human computer interface systems. ssvep is a response to visual stimuli presented. we present a classification method to discriminate between cl...

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