Publications by authors named "Justin Granstein"

Background: Variability in long-term endovascular treatment outcomes for intracranial aneurysms has prompted questions regarding the effects of these treatments on aneurysm hemodynamics. Endovascular techniques disrupt aneurysmal blood flow and shear, but their influence on intra-aneurysmal pressure remains unclear. A better understanding of aneurysm pressure effects may aid in predicting outcomes and guiding treatment decisions.

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Intracranial hemorrhages are highly concerning but underreported complications related to flow diversion (FD) treatment of intracranial aneurysms. Herein, we aimed to characterize these complications and the factors influencing their occurrence. We retrospectively reviewed patients treated with FD from 2013 to 2023 at a single U.

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Article Synopsis
  • - The study aimed to analyze stroke-related outcomes between Moyamoya syndrome (MMS) subgroups and Moyamoya disease (MMD) patients using propensity score matching (PSM) to provide direct comparisons.
  • - Researchers analyzed a national database from 2011-2020, focusing on patients with MMD and specific comorbidities (sickle-cell disease, Down syndrome, and neurofibromatosis), and matched them to control for stroke risk factors.
  • - Results indicated that patients with MMS related to sickle-cell disease had significantly lower rates of ischemic strokes, hemorrhagic strokes, and transient ischemic attacks compared to those with MMD only, while no significant differences were found in the MMS
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Background: The plasticity of the Circle of Willis represents an underexplored yet intriguing dimension of vascular anatomy in cerebrovascular disorders. We outline distinct patterns of change in response to aneurysm treatment using flow diversion (FD) after covering major branches.

Methods: Retrospective analysis of digital subtraction angiographies from intracranial aneurysms treated with FD from 2013 to 2023.

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Objective: As endovascular interventions become safer and their use more prevalent for treating extracranial pseudoaneurysms, fewer pseudoaneurysms are treated with medical therapy alone. This study aimed to assess the indications for intervention and the safety of medical management.

Methods: A dual-center retrospective analysis was conducted on patients diagnosed with extracranial carotid and vertebral pseudoaneurysms between December 2006 and June 2023.

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Background: The Matsushima grade has traditionally been used to evaluate vessel ingrowth from the superficial temporal artery after encephalo-duro-arterio-synangiosis (EDAS) for Moyamoya disease (MMD) patients. However, this grading is subjective and prone to measurement variability. Herein, we propose the orbital grading system quantifying leptomeningeal and burr hole-related vessel-ingrowth from the superficial temporal artery and/or middle meningeal artery to the middle and anterior cerebral arteries post EDAS in MMD patients.

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Article Synopsis
  • Thromboembolic (TE) events, which can arise even with proper dual antiplatelet therapy, are serious complications following flow diversion (FD) procedures used to treat aneurysms, leading to significant morbidity and mortality.
  • A study was conducted on 651 FD procedures in 591 patients from 2013 to 2023, revealing a TE event rate of 5.8%, with permanent deficits in 20 patients and 4 fatalities linked to vascular occlusions.
  • Factors such as aspirin resistance, age, and aneurysm characteristics were identified as predictors for the occurrence of TE events, particularly highlighting the high morbidity associated with large-vessel occlusions in the middle cerebral artery.
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Background: Factors impacting the rate of aneurysm occlusion after flow diversion (FD) have been well described in the literature. In this article, we sought to evaluate those variables to develop and validate a scoring system predicting aneurysm incomplete occlusion after FD.

Methods: Retrospective review of patients with intracranial aneurysms treated with FD at a single institution between March 2013 and March 2023.

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Background: As endovascular neurosurgery techniques continue to evolve, medical students in the United States have widely varying exposures to the field, particularly with respect to opportunities for hands-on experiences. Current medical school curricula could benefit from a novel and adaptive course on vascular neurosurgery to increase student exposure earlier in their training.

Methods: We launched a yearly hands-on vascular neurosurgery course for medical students and residents.

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Background: Endovascular options for the treatment of basilar apex aneurysms (BAAs) are heterogeneous, and evidence is limited to retrospective cohorts and case series. We seek to evaluate the efficacy and complications associated with various endovascular treatment methods of BAAs.

Methods: Systematic review of PubMed, Embase, and Web of Science adhering to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines.

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Objective: Concern about thromboembolic events after flow diversion (FD) warrants dual antiplatelet therapy for 3 to 6 months. Platelet function tests are routinely performed prior to the procedure to detect clopidogrel responsiveness, as resistance is associated with CYP2C19 gene polymorphisms. This study aimed to identify optimal cutoff values in light transmission aggregometry (LTA) for clopidogrel and aspirin as predictive indicators of thromboembolic complications.

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Article Synopsis
  • Flow diversion treatment for bifurcation aneurysms raises concerns about ischemic events, particularly when covering the posterior cerebral artery (PCA) during the procedure.
  • A study analyzed 28 patients with basilar and proximal PCA aneurysms over 10 years, finding that exclusion of the PCA occurred in 15 cases, with an 80.8% success rate in occluding the aneurysms.
  • Despite some patients experiencing thromboembolic complications, the occurrence was not significantly higher in those where the PCA was covered, and there was no notable difference in post-treatment disability between the two groups.
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Objective: Refractory status epilepticus (RSE) treated with anesthetic agents can be associated with complications including respiratory depression and hypotension. Ketamine is an emerging RSE treatment, but optimal dosing and timing are unknown. We studied provider attitudes and practices regarding the use of ketamine for RSE.

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Background And Objectives: The pipeline embolization device (PED) Flex with Shield technology is a third-generation flow diverter used for intracranial aneurysm treatment designed to decrease thrombogenicity through a phosphorylcholine coating. Herein, we aim to compare the rate of thromboembolic events in PED with Shield technology and PED without it through propensity score matching.

Methods: We conducted a retrospective analysis of aneurysms treated with PED first-generation/PED Flex and PED with Shield between 2013 and 2023 at a single academic institution.

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In this review article, we summarized the current advances in rescue management for reperfusion therapy of acute ischemic stroke from large vessel occlusion due to underlying intracranial atherosclerotic stenosis (ICAS). It is estimated that 24-47% of patients with acute vertebrobasilar artery occlusion have underlying ICAS and superimposed thrombosis. These patients have been found to have longer procedure times, lower recanalization rates, higher rates of reocclusion and lower rates of favorable outcomes than patients with embolic occlusion.

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Background: Tracheostomy represents one important and value-laden treatment decision after severe acute brain injury (SABI). Whether to pursue this life-sustaining treatment typically hinges on intense conversations between family and clinicians. The aim of this study was, among a cohort of patient who had undergone tracheostomy after SABI, to explore the long-term reflections of patients and their families as they look back on this decision.

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Objective: To synthesize reported long-term outcomes in patients undergoing tracheostomy after severe acute brain injury (SABI).

Methods: We systematically searched PubMed, EMBASE, and Cochrane Library for studies in English, German, and Spanish between 1990 and 2019, reporting outcomes in patients with SABI who underwent tracheostomy. We adhered to the preferred reporting items for systematic reviews and meta-analyses guidelines and the meta-analyses of observational studies in epidemiology guidelines.

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Delusional misidentification syndromes and erotomania are rare entities, each with several distinct manifestations and no clearly defined treatment regimen. Here we expand upon an earlier literature review and describe the case of a 40-year-old woman with a history of bipolar I disorder who presented after an extended period of medication nonadherence with symptoms consistent with both of these conditions; she believed that the staff on the unit were in fact disguised celebrities and fictional characters, and she claimed to be married to a famous singer. The exact relationship of these symptoms (and indeed, even their basic etiologies) remains unclear; however, both delusional syndromes resolved with a combination of risperidone and lithium therapy.

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