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Journal Cover Interventional Neurology
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   Full-text available via subscription Subscription journal  (Not entitled to full-text)
   ISSN (Print) 1664-9737 - ISSN (Online) 1664-5545
   Published by Karger Homepage  [101 journals]
  • Contents Vol. 5, 2016
    • Abstract:
      Intervent Neurol 2016;5:I-IV
      PubDate: 2016-09-16T00:00:00+02:00
  • Repeated Mechanical Thrombectomy in Recurrent Large Vessel Occlusion Acute
           Ischemic Stroke
    • Abstract: Background: Endovascular therapy has been proven effective for the treatment of large vessel occlusion strokes (LVOS). However, the feasibility and potential benefits of repeat thrombectomy for recurrent stroke is unclear. We aim to report our experience with repeat thrombectomy for recurrent LVOS. Methods: We reviewed our prospectively collected endovascular database for patients who underwent repeated mechanical thrombectomy. Baseline characteristics, procedural data and outcomes were evaluated. Patients with repeat thrombectomy were compared to patients with single thrombectomy. For patients with repeat thrombectomy, imaging and procedural variables were compared between first and last procedures. Results: Out of 697 patients treated within the study period, 15 patients (2%) had repeat thrombectomies (14 treated twice and one thrice). The mean age was 63 ± 15 years and 40% were males. The median time between the first and last procedure was 18 (1-278) days. Cardioembolism (66%) was the most common etiology, followed by intracranial atherosclerosis (13%) and large vessel atherosclerosis (6%). At 90 days after the last thrombectomy, 60% of patients achieved a modified Rankin Scale score of 0-2 and 20% were deceased. There were no statistically significant differences in demographics, stroke severity, time from last known normal to puncture, reperfusion rates, hemorrhagic complications, good clinical outcomes and mortality between patients who underwent repeat thrombectomy and those who had a single thrombectomy. Conclusion: In properly selected patients suffering recurrent LVOS, repeated mechanical thrombectomy appears to be feasible and safe. A previous thrombectomy should not discourage aggressive treatment as these patients may achieve similar rates of good clinical outcomes as those who undergo single thrombectomy.
      Intervent Neurol 2017;6:1-7
      PubDate: 2016-09-09T00:00:00+02:00
  • Open-Label Phase I Clinical Study to Assess the Safety and Efficacy of
    • Abstract: Background: One-month dual antiplatelet treatment, with aspirin and clopidogrel, following internal carotid artery stent placement is the current standard of care to prevent in-stent thrombosis. Cilostazol, an antiplatelet drug, has been demonstrated to have a safety profile comparable to aspirin and clopidogrel. Objective: To evaluate the safety and clinical efficacy of cilostazol and aspirin therapy following internal carotid artery stent placement up to 1 month postprocedure. Methods: A phase I open-label, nonrandomized two-center prospective study was conducted. All subjects received aspirin (325 mg/day) and cilostazol (200 mg/day) 3 days before extracranial stent placement. Two antiplatelet agents were continued for 1 month postprocedure followed by aspirin daily monotherapy. The primary efficacy end point was the 30-day composite occurrence of death, cerebral infarction, transient ischemic attack, and in-stent thrombosis. The primary safety end point was bleeding. Results: Twelve subjects (mean age ± SD, 66 ± 12 years; 9 males) were enrolled and underwent internal carotid artery angioplasty and stent placement. None of the subjects who successfully followed the study protocol experienced any complications at the 1- and 3-month follow-ups. One patient had a protocol deviation due to concurrent use of enoxaparin (1 mg/kg twice daily) in addition to aspirin and cilostazol, resulting in a fatal symptomatic intracerebral hemorrhage following successful stent placement on postprocedure day 1. One patient discontinued cilostazol after the first dose secondary to dizziness. Conclusion: The use of cilostazol and aspirin for internal carotid artery stent placement appears to be safe, but protocol compliance needs to be emphasized.
      Intervent Neurol 2017;6:42-48
  • Title Page
    • Abstract:
      Intervent Neurol 2016;5(suppl 1):I-II
  • 9th Annual Meeting. 4th Annual Stroke Center Workshop (6M Conference).
           Society of Vascular and Interventional Neurology. November 16-19,
           Brooklyn, New York, N.Y.: Abstracts
    • Abstract:
      Intervent Neurol 2016;5(suppl 1):1-94
  • Comparison of 3-Month Stroke Disability and Quality of Life across
           Modified Rankin Scale Categories
    • Abstract: Background and Purpose: Modified Rankin Scale (mRS) score 0-2 has been used to define “good outcome” while stroke patients with mRS 3 are grouped with mRS 4-6 as having “poor outcome.” Long-term data comparing quality of life (QoL), particularly across the mRS 2, 3, and 4 subgroups, are sparse. Methods: Participants in the Interventional Management of Stroke 3 (IMS3) trial with documented 3-month mRS, functional disability (Barthel index [BI]), and self-reported EQ5D-3L QoL questionnaires at 3 months after stroke were included. EQ5D-3L summary indices were calculated using published utility weights for the US population. BI and EQ5D-3L indices were compared across mRS categories using multiple pairwise comparisons with appropriate alpha error corrections. Results: Four hundred twenty-three patients were included (mean age 64 ± 13 years, median baseline NIHSS 16 [IQR 12-19], mean BI 84.1 ± 25.3, and mean EQ5D-3L index 0.73 ± 0.24). While significant differences in BI were observed across mRS categories, QoL in the mRS 2 and 3 categories was similar. Based on BI and EQ5D-3L index, mRS 3 status was more similar to mRS 2 than to mRS 4 status, and large heterogeneity in the mRS 3 group was observed. Conclusions: Ischemic stroke patients who achieve mRS 2 and 3 functional outcomes seem to have similar health-related QoL scores. mRS 0-3, rather than 0-2, should be considered a good outcome category in moderate to severe ischemic stroke.
      Intervent Neurol 2017;6:36-41
  • Salvage of Herniated Flow Diverters Using Stent and Balloon Anchoring
           Techniques: A Technical Note
    • Abstract: Background: The pipeline embolization device (PED; Medtronic, MN, USA) can sometimes herniate into the aneurysmal sac in an unexpected manner during or shortly after its deployment due to device foreshortening. In this report, we describe 2 endovascular techniques, which can be used to reposition a herniated PED construct into a more favorable alignment. Summary: In a 67-year-old patient who had an intraprocedural herniation of a PED device into a giant cavernous aneurysm, a stent anchor technique was used to reverse the herniation, reorient the PED construct, and achieve successful flow diversion. In a different patient with a giant superior hypophyseal aneurysm, a balloon anchor technique followed by deployment of an LVIS Jr (Microvention, Tustin, CA, USA) stent was used to reverse the herniation into the aneurysmal sac. Key Messages: Stent anchor and balloon anchor techniques as described here can be used to reposition PED constructs, which have unexpectedly herniated into the aneurysm sac during attempted flow diversion for the treatment of giant aneurysms.
      Intervent Neurol 2017;6:31-35
  • Endovascular Therapy Demonstrates Benefit over Intravenous Recombinant
           Tissue Plasminogen Activator Based on Repeatedly Measured National
           Institutes of Health Stroke Scale
    • Abstract: Background and Purpose: The Interventional Management of Stroke (IMS) III trial was a randomized controlled trial designed to compare the effect of endovascular therapy after intravenous recombinant tissue plasminogen activator (i.v. rt-PA) as compared to i.v. rt-PA alone. The primary outcome was modified Rankin Scale at 90 days. Secondary outcomes included National Institutes of Health Stroke Scale (NIHSS), which was assessed repeatedly through 90 days. The objective of this analysis is to evaluate the treatment effect of endovascular therapy over time on NIHSS. Methods: 656 subjects were enrolled in the IMS III trial, including 434 subjects randomized to endovascular therapy and 222 to i.v. rt-PA only. NIHSS scores evaluated at 40 min, 24 h, Day 5, and Day 90 were included in the analysis. A covariance structure model was used to investigate the treatment effect on NIHSS over time, adjusting for relevant covariates including baseline stroke severity. Model assumptions were valid. Results: Based on the covariance structure model, after adjusting for relevant baseline covariates, a significant time-by-treatment interaction effect (p = 0.0137) was observed. Only NIHSS at Day 90 showed a significant treatment effect (p = 0.0473), with subjects in the endovascular arm having a lower NIHSS (less neurologic deficit) compared to the i.v. rt-PA arm. Conclusions: The IMS III trial demonstrated an endovascular treatment effect based on the secondary outcome of NIHSS. However, the magnitude of this treatment effect varied by the time of assessment. It was only at Day 90 that the endovascular arm had a significantly lower NIHSS compared to that in the i.v. rt-PA arm.
      Intervent Neurol 2017;6:25-30
  • Stent Retriever-Mediated Manual Aspiration Thrombectomy for Acute Ischemic
    • Abstract: Background and Purpose: Stent retriever thrombectomy and manual aspiration thrombectomy (MAT) have each been shown to lead to high rates of recanalization as single-modality endovascular stroke therapy. We sought to describe the safety and efficacy of a multimodal approach combining these two techniques termed ‘stent retriever-mediated manual aspiration thrombectomy' (SMAT) and compared them to MAT alone. Methods: Retrospective review of a prospectively acquired acute endovascular stroke database. Results: 195 consecutive patients with large-vessel occlusion were identified between July 2013 and April 2015. Occlusion distribution was as follows: 52% middle cerebral artery segment 1 (M1), 6% M2, 29% internal carotid artery, and 13% vertebrobasilar. Median onset to treatment time was 278 min. Intravenous rtPA was administered in 33% of cases, whereas 34% of cases had symptom onset beyond 8 h. Effective recanalization (TICI 2b/3) was achieved in 91% of patients and in 49% of patients, only a single pass was necessary. Median groin puncture to recanalization time was 40 min. Symptomatic intracerebral hemorrhage occurred in 5% of patients. Favorable outcomes defined as a modified Rankin Scale score of 0-2 were noted in 42% of patients. Compared with MAT alone, SMAT achieved a similar rate of effective recanalization (91 vs. 88%, p = n.s.) but was associated with faster access to reperfusion times (49 vs. 77 min, p < 0.00001). Conclusions: SMAT is a safe and efficacious method to achieve rapid revascularization that leads to faster recanalization compared to manual aspiration alone. Future prospective comparisons are necessary to establish the most clinically effective therapy for acute thrombectomy.
      Intervent Neurol 2017;6:16-24
  • Heads Up! A Novel Provocative Maneuver to Guide Acute Ischemic Stroke
    • Abstract: Background: A common dilemma in acute ischemic stroke management is whether to pursue recanalization therapy in patients with large vessel occlusions but minimal neurologic deficits. We describe and report preliminary experience with a provocative maneuver, i.e. 90-degree elevation of the head of bed for 30 min, which stresses collaterals and facilitates decision-making. Methods: A prospective cohort study of
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