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Source: Journal of Stroke and Cerebrovascular Diseases
Procedure: Ultrasound
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Total 74 results found since Jan 2013.
Comment on “The Enhancing Effect of Focused Ultrasound on TNK-Tissue Plasminogen Activator-Induced Thrombolysis using an In Vitro Circulating Flow Model”
We recently read the article by Papadopoulos et al published in the Journal of Stroke and Cerebrovascular Diseases.1 However, we have some concerns about the methodology and their potential consequences on the interpretation of results.
Source: Journal of Stroke and Cerebrovascular Diseases - April 9, 2019 Category: Neurology Authors: Laurent Auboire, Jean-Michel Escoffre Tags: Letter to the Editor Source Type: research
Carotid Intima-media Thickness, Cognitive Performance and Cognitive Decline in Stroke-free Middle-aged and Older Adults. The Atahualpa Project
Background: Little is known on factors influencing cognitive function in rural communities. Using the Atahualpa Project cohort, we aimed to assess whether the carotid intima-media thickness (cIMT) – used as a surrogate of extracranial carotid atherosclerosis – is associated with cognitive performance and further decline in community-dwelling adults living in a rural setting. Methods: The study included Atahualpa residents aged greater than or equal to 40 years who had ultrasound examinati on of the extracranial carotid arteries and a baseline Montreal Cognitive Assessment (MoCA), as well as the subset of individuals wh...
Source: Journal of Stroke and Cerebrovascular Diseases - December 12, 2019 Category: Neurology Authors: Oscar H. Del Brutto, Robertino M. Mera, Bettsy Y. Recalde, Victor J. Del Brutto Source Type: research
Characteristics of the carotid plaque in hypertensive patients with hyperhomocysteinemia using multimode ultrasound
In this study, the characteristics of carotid plaque in hypertensive patients with hyperhomocysteinemia were preliminarily studied by conventional ultrasound, contrast-enhanced ultrasound and virtual touch image quantification.
Source: Journal of Stroke and Cerebrovascular Diseases - July 15, 2020 Category: Neurology Authors: Zhifei Ben, Jue Wang, Jingyong Zhan, Xiujuan Li, Haidong Ruan, Saijun Chen Source Type: research
Bilateral MCP Infarct Due to Vertebral Giant Cell Arteritis
We present the case of an 83-year-old woman with an isolated bilateral middle cerebellar peduncles stroke caused by complete occlusion of the right vertebral artery and focal occlusion of the left vertebral artery due to giant cell arteritis. The diagnosis was achieved by integrating MRI, ultrasound study, laboratory data and subsequent pathology analysis after biopsy of the temporal artery.
Source: Journal of Stroke and Cerebrovascular Diseases - November 4, 2020 Category: Neurology Authors: Gennaro Castiello, Carlo A. Mallio, Claudia Altamura, Massimo Marano, Anna Crescenzi, Bruno Beomonte Zobel, Carlo C. Quattrocchi, Vincenzo Di Lazzaro Tags: Case Report Source Type: research
Transcranial Doppler Ultrasound Evidence of Active Cerebral Embolization in COVID-19
: To report six consecutive patients with confirmed coronavirus disease-2019 (COVID-19) who underwent Transcranial Doppler (TCD) ultrasonography evaluation for cerebral microemboli in the setting of suspected or confirmed acute ischemic stroke.
Source: Journal of Stroke and Cerebrovascular Diseases - December 9, 2020 Category: Neurology Authors: Ayush Batra, Jeffrey R. Clark, Katie LaHaye, Nathan A. Shlobin, Steven C. Hoffman, Zachary S. Orban, Katharine Colton, Jane E. Dematte, Farzaneh A. Sorond, Igor J. Koralnik, Eric M. Liotta Source Type: research
Predictors of Severity of Cerebral Vasospasm caused by Aneurysmal Subarachnoid Hemorrhage
Background: Cerebral vasospasm is one of the leading causes of poor outcome after aneurysmal subarachnoid hemorrhage. The risk factors for the development of vasospasm have been evaluated in many clinical studies. However, it remains unclear if vasospasm severity can be predicted. The purpose of this study was to determine if different demographic and clinical factors that appear to be predictors of vasospasm can also prognosticate the severity of cerebral vasospasm.Methods: We retrospectively analyzed consecutive patients with subarachnoid hemorrhage who underwent endovascular vasospasm treatment in a single center. In or...
Source: Journal of Stroke and Cerebrovascular Diseases - February 18, 2013 Category: Neurology Authors: Ramazan Jabbarli, Sven Gläsker, Johannes Weber, Christian Taschner, Manfred Olschewski, Vera Van Velthoven Tags: Original Articles Source Type: research
MRI-guided Sonothrombolysis of Rabbit Carotid Artery
The potential of magnetic resonance imaging–guided focused ultrasound (MRgFUS) combined with the thrombolytic drug recombinant tissue plasminogen activator (rt-PA) to dissolve clots in the carotid of a New Zealand rabbit in vivo is evaluated. A spherically focused transducer of 5-cm diameter, focusing at 10 cm and operating at 1 MHz, was used. A pulsed ultrasound protocol was used that maintains a tissue temperature increase of less than 1°C in the clot (called safe temperature). MRgFUS has the potentials to dissolve clots that are injected in the carotid of rabbits in vivo. It was found that the time needed for ope...
Source: Journal of Stroke and Cerebrovascular Diseases - October 14, 2013 Category: Neurology Authors: Christakis Damianou, Venediktos Hadjisavvas, Nicos Mylonas, Andreas Couppis, Kleanthis Ioannides Tags: Original Articles Source Type: research
Validation of Ultrasound Parameters to Assess Collateral Flow via Ophthalmic Artery in Internal Carotid Artery Occlusion
This study aimed to characterize the flow patterns using ultrasound (US) in the external carotid artery (ECA) in patients with total occlusion of internal carotid artery (ICA) and characterize collateral retrograde flow through the ophthalmic artery (OA, secondary collateral, internalization). This study was performed on 45 patients who were retrospectively selected with total occlusion of the ICA, who underwent digital subtraction angiography (DSA), magnetic resonance angiography (MRA), and US (43 men; mean age 68.1 ± 7.9 years). Collateral retrograde flow and collateral flow through the circle of Willis (primary col...
Source: Journal of Stroke and Cerebrovascular Diseases - November 21, 2013 Category: Neurology Authors: Tomotaka Tanaka, Ryosuke Doijiri, Kozue Saito, Katsufumi Kajimoto, Masafumi Ihara, Hiroshi Yamagami, Kotaro Miyashita, Kazuyuki Nagatsuka Tags: Original Articles Source Type: research
Restenosis after Carotid Artery Stenting Using a Specific Designed Ultrasonographic Protocol
Conclusions: Our results, using a DUS protocol and a specific peak systolic velocity threshold, showed that the frequency of restenosis at 2 years after CAS is 6.0% and so that CAS is probably a durable revascularization procedure. We emphasize the diagnostic agreement achieved between DUS and carotid CTA.
Source: Journal of Stroke and Cerebrovascular Diseases - February 21, 2014 Category: Neurology Authors: Pedro Barros, Helena Felgueiras, Dulce Pinheiro, Miguel Guerra, Vasco Gama, Miguel Veloso Tags: Original Articles Source Type: research
Potential of Magnetic Resonance-guided Focused Ultrasound for Intracranial Hemorrhage: An In Vivo Feasibility Study
Conclusions: Our results demonstrate the feasibility of fast, efficient, and safe thrombolysis in an in vivo porcine model of ICH and in 2 ex vivo models using a human skull, without introducing tPA. Future studies will further optimize parameters and assess the nature of sonication-mediated versus natural clot lysis, the risk of rebleeding, the potential effect on the adjacent parenchyma, and the chemical and toxicity profiles of resulting lysate particles.
Source: Journal of Stroke and Cerebrovascular Diseases - April 11, 2014 Category: Neurology Authors: Sagi Harnof, Zion Zibly, Arik Hananel, Stephen Monteith, Javier Grinfeld, Gilat Schiff, Iris Kulbatski, Neal Kassell Tags: Original Articles Source Type: research
In Vitro and In Vivo Evaluation of a Magnetic Resonance Imaging–guided Focused Ultrasound System for Dissolving Clots in Combination with Thrombolytic Drugs
Conclusions: The MRgFUS technique was proven successful in dissolving clots in vitro and in vivo. It was found that the volume of dissolved clot increases with acoustic intensity and beam size and decreases with frequency. With this system, it was possible to push ultrasound through a plastic phantom skull using a .5 MHz transducer. The beam of ultrasound through the phantom skull was monitored using the MRI technique of fast spoiled gradient. Finally, the thrombus in the in vivo model (ear artery) was successfully destroyed with the therapeutic protocols investigated in the in vitro models. This study shows that FUS ...
Source: Journal of Stroke and Cerebrovascular Diseases - May 1, 2014 Category: Neurology Authors: Christakis Damianou, Venediktos Hadjisavvas, Kleanthis Ioannides Tags: Original Articles Source Type: research
A Traveling “Spot Sign” in Recurrent Amaurosis Fugax and Central Retinal Artery Occlusion
In conclusion, this case report describes a single case of repeated amaurosis fugax and deterioration to CRAO via embolization into the central retinal artery and consecutive downstream dislodgment. It emphasizes that ultrasound may render valuable diagnostic information in patients with acute central retinal artery embolization toward its embolic etiology and its risk of subsequent deterioration.
Source: Journal of Stroke and Cerebrovascular Diseases - June 23, 2014 Category: Neurology Authors: Max Nedelmann, Christian Tanislav, Manfred Kaps Tags: Case Reports Source Type: research
In Vitro and In Vivo Evaluation of a Magnetic Resonance Imaging–guided Focused Ultrasound System for Dissolving Clots in Combination with Thrombolytic Drugs
Source: Journal of Stroke and Cerebrovascular Diseases - May 1, 2014 Category: Neurology Authors: Christakis Damianou, Venediktos Hadjisavvas, Kleanthis Ioannides Source Type: research
Potential of Magnetic Resonance-guided Focused Ultrasound for Intracranial Hemorrhage: An In Vivo Feasibility Study
Source: Journal of Stroke and Cerebrovascular Diseases - April 9, 2014 Category: Neurology Authors: Sagi Harnof, Zion Zibly, Arik Hananel, Stephen Monteith, Javier Grinfeld, Gilat Schiff, Iris Kulbatski, Neal Kassell Tags: Original Articles Source Type: research
Utility of 3-dimensional Ultrasound Imaging to Evaluate Carotid Artery Stenosis: Comparison with Magnetic Resonance Angiography
We evaluated the utility of 3-dimensional (3-D) ultrasound imaging for assessment of carotid artery stenosis, as compared with similar assessment via magnetic resonance angiography (MRA).
Source: Journal of Stroke and Cerebrovascular Diseases - October 16, 2014 Category: Neurology Authors: Keiji Igase, Yoshiaki Kumon, Ichiro Matsubara, Masamori Arai, Junji Goishi, Hideaki Watanabe, Takanori Ohnishi, Kazuhiko Sadamoto Source Type: research
