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  • 1
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    The Stroke Patient Who Woke Up : Clinical and Radiological Features, Including Diffusion and Perfusion MRI
    Ovid Technologies (Wolters Kluwer Health) ; 2002
    In:  Stroke Vol. 33, No. 4 ( 2002-04), p. 988-993
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 33, No. 4 ( 2002-04), p. 988-993
    Abstract: Background and Purpose — Time of stroke onset is uncertain for patients who wake from sleep with stroke. Functional imaging techniques may allow estimation of benefit and risk of acute stroke therapy. We compared the clinical and multimodal MRI findings of patients with uncertain stroke onset with those with known onset time. Methods — Patients imaged within 24 hours of ischemic stroke onset between January 1997 and June 2000 were identified from a prospective stroke registry. Clinical and imaging data from patients with known stroke onset (group I) were compared with those who woke with stroke (group II). Results — A total of 364 patients were identified, of whom 100 (27%) woke from sleep with stroke. Group I and group II did not differ in age, gender, National Institutes of Health Stroke Scale, or TOAST (Trial of Org 10172 in Acute Stroke Treatment) diagnoses. Time from stroke onset was shorter in group I (mean 6.0 versus 13.3 hours, P 〈 0.001); time from detection did not differ between groups (6.0 versus 5.9 hours). Within 3 hours, diffusion-weighted imaging (DWI) and perfusion-weighted imaging (PWI) lesion volumes were similar in both groups; DWI-PWI mismatch was present in 82% of group I and 73% of group II patients. Mean apparent diffusion coefficient of water (ADC) of group I patients was negatively associated with DWI volume (β=−0.324, P =0.004) and time from stroke onset (β=−0.238, P =0.031) in multivariate analysis. The mean ADC of group II patients was lower than that of group I patients within 3 hours of stroke detection (mean 556 versus 665 μm 2 /s, P 〈 0.01), but individual group II patients had ADC values as high as 742 μm 2 /s, in addition to a DWI-PWI mismatch pattern. Conclusions — Onset time is uncertain in over one quarter of acute ischemic stroke patients. Clinical features of these patients do not differ significantly from those with known onset time. Some patients who wake with stroke seem to have favorable imaging characteristics for acute stroke therapy. Further study is needed to determine whether criteria for therapy based on imaging parameters can safely be applied to these patients.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/01.STR.0000014585.17714.67
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2002
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  • 2
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    Polyglycolide/Polylactide-Coated Platinum Coils for Patients With Ruptured and Unruptured Cerebral Aneurysms : A Single-Center Experience
    Ovid Technologies (Wolters Kluwer Health) ; 2005
    In:  Stroke Vol. 36, No. 9 ( 2005-09), p. 1948-1953
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 36, No. 9 ( 2005-09), p. 1948-1953
    Abstract: Background and Purpose— Recanalization of cerebral aneurysm is a limitation of bare platinum coils (BPCs). In a swine aneurysm model, polyglycolide/polylactide (a polymer)-coated platinum coils (Matrix) accelerated clot fibrosis and reduced recanalization rate and aneurysmal volume. We aimed to evaluate the safety of Matrix coils in patients with intracranial aneurysm. Methods— This is a single-center, prospective study of patients with intracranial aneurysms treated with Matrix alone or in combination with BPCs. Follow-up evaluation included a 1-month clinical evaluation and a 6- and 12-month clinical and angiographic examination. Primary adverse events included death, stroke, and permanent neurological deficits. Results— Between May 2002 and January 2004, 52 patients (range 34 to 79 years of age; 38 females) were treated for 54 aneurysms (size 7.9±4.6 mm; neck 3.9±1.5 mm; 26 ruptured). Matrix alone was used in 13 aneurysms. In 39, we used a combination of Matrix and BPCs. Twenty-one aneurysms had a 6-month follow-up examination (11 Matrix; 10 Matrix combined with bare platinum), and 11 completed the 12-month follow-up evaluation (Matrix only). Adverse events not related to the procedure were 2 deaths (ruptured basilar aneurysms) and 1 stroke at day 10 postcoiling secondary to vasospasm. Procedure-related adverse events were 2 strokes. At 6-month follow-up (n=21) evaluation, 2 of 3 recanalizations needed retreatment. At 12-month follow-up (n=11), there was no recanalization in patients treated with Matrix alone and no significant reduction in aneurysmal size. Conclusions— Polyglycolide/polylactide-coated coils had a satisfactory safety profile. Significant aneurysmal size reduction after coiling was not observed.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/01.STR.0000177532.94736.85
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2005
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  • 3
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    Editorial Comment—Can MRI Reliably Detect Hyperacute Intracerebral Hemorrhage? Ask the Medical Student
    Ovid Technologies (Wolters Kluwer Health) ; 2004
    In:  Stroke Vol. 35, No. 2 ( 2004-02), p. 506-507
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 35, No. 2 ( 2004-02), p. 506-507
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/01.STR.0000115529.14410.CF
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2004
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  • 4
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    Brain Aneurysms and Arteriovenous Malformations : Advancements and Emerging Treatments in Endovascular Embolization
    Ovid Technologies (Wolters Kluwer Health) ; 2007
    In:  Stroke Vol. 38, No. 4 ( 2007-04), p. 1411-1417
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 38, No. 4 ( 2007-04), p. 1411-1417
    Abstract: Background and Purpose— Brain aneurysms and vascular malformations can cause cerebral hemorrhages, with devastating consequences for the patients and their families. Since the development of microcatheters and materials used for endovascular embolization, we have witnessed a rapid advancement in the technology and in the number or patients treated with this approach. The aim of this review is to survey recent data relevant to new technologies and emerging treatment strategies in these areas. Summary of Review— Clinical trials assessing the safety and efficacy of coil embolization for cerebral aneurysms were based on the use of bare platinum, helical coils. Since then, endovascular operators have been testing and using new materials such as bioactive coils, expandable coils, and complex-shaped coils. Based on the data so far obtained, third and fourth generation coil designs are rapidly emerging and will be ready for clinical application in the near future. Balloon- and stent-assisted coil embolization is enabling the treatment of complex, large-neck aneurysms and the vascular reconstruction of lesions previously considered not treatable. New open- and closed-cell designs allow the navigation and deployment of stents in extremely tortuous vessels. With regards to the embolization of vascular malformations, it is possible to safely navigate microcatheters and microwires through very small arteries previously considered not accessible. In addition, embolization materials such as n-butyl cyanoacrylate and ethylene-vinyl alcohol copolymer are now routinely injected to safely reduce or obliterate large and complex arteriovenous malformations and fistulae. Conclusions— Advancements in technology are rapidly improving the endovascular approach to the treatment of cerebral aneurysms and arteriovenous malformations.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/01.STR.0000259824.10732.bb
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2007
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  • 5
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    Is the Association of National Institutes of Health Stroke Scale Scores and Acute Magnetic Resonance Imaging Stroke Volume Equal for Patients With Right- and Left-Hemisphere Ischemic Stroke?
    Ovid Technologies (Wolters Kluwer Health) ; 2002
    In:  Stroke Vol. 33, No. 4 ( 2002-04), p. 954-958
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 33, No. 4 ( 2002-04), p. 954-958
    Abstract: Background and Purpose — The National Institutes of Health Stroke Scale (NIHSS) is an established measure of neurological impairment; however, it can award more points for tests of presumed left-hemisphere function, such as language, than for tests of right-hemisphere function, such as neglect. This difference may be important if a low NIHSS score is used to exclude patients with right-hemisphere stroke from clinical trials or established treatments. The aim of this study was to investigate whether the relationship between acute NIHSS score and acute stroke volume as determined by acute diffusion- and perfusion-weighted MRI (DWI and PWI) differs between right- and left-sided stroke. Methods — This was a retrospective study of 153 patients with acute stroke seen at Beth Israel Deaconess Medical Center between January 1995 and March 2000 who underwent an MRI examination and NIHSS within 24 hours of stroke onset. NIHSS score was recorded prospectively by the admitting stroke fellow at the time of acute presentation, immediately preceding imaging. Computerized volumetric analysis of the MRI lesions was performed by investigators blinded to clinical data. Results — There were significant correlations between the acute NIHSS scores and acute DWI lesion volumes ( r =0.48 right, r =0.58 left) and between acute NIHSS scores and perfusion-weight imaging hypoperfusion volumes ( r =0.62 right, r =0.60 left). For patients with NIHSS scores of 0 to 5, the DWI volume of right cerebral lesions was greater than that of left-sided lesions (mean volume, 8.8 versus 3.2 cm 3 ; P =0.04). Among patients with DWI lesions larger than the median volume (9 cm 3 ), 8 of 37 with right-sided stroke had an NIHSS score of 0 to 5 compared with 1 of 39 patients with left-sided stroke ( P =0.01). Multiple linear regression analysis revealed a significantly lower acute NIHSS on the right compared with the left side when adjusted for stroke volume on chronic T2 imaging ( P =0.03). Conclusions — Patients with right-sided stroke may have a low NIHSS score despite substantial DWI lesion volume. Acute imaging information, such as that available with multimodal MRI, may be useful to identify patients for inclusion in acute stroke protocols when there is clinical uncertainty about eligibility. Prospective evaluation of criteria incorporating acute imaging data is required.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/01.STR.0000013069.24300.1D
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2002
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  • 6
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    Clinical and Vascular Outcome in Internal Carotid Artery Versus Middle Cerebral Artery Occlusions After Intravenous Tissue Plasminogen Activator
    Ovid Technologies (Wolters Kluwer Health) ; 2002
    In:  Stroke Vol. 33, No. 8 ( 2002-08), p. 2066-2071
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 33, No. 8 ( 2002-08), p. 2066-2071
    Abstract: Background and Purpose — Early reperfusion is a predictor of good outcome in acute ischemic stroke. We investigated whether middle cerebral artery (MCA) occlusions have a better clinical outcome and proportion of recanalization compared with internal carotid artery (ICA) occlusion after standard treatment with intravenous (IV) tissue plasminogen activator (tPA). Patients — In a retrospective analysis of our prospective stroke database between January 7, 1998, and January 30, 2002, we identified 36 consecutive patients who were treated with IV tPA within 3 hours after symptom onset of a stroke in the distribution of a documented ICA or MCA occlusion. The National Institutes of Health Stroke Scale (NIHSS) score was recorded before tPA, at 24 hours, 3 days, and 3 months after stroke. Three-month outcome was recorded by modified Rankin scale. Magnetic resonance angiography or computed tomographic angiography was obtained before tPA. The presence of recanalization was assessed by transcranial Doppler and/or magnetic resonance angiography within 3 days after stroke onset. Results — Nineteen patients had MCA occlusion, and 17 had ICA-plus-MCA occlusion before tPA. Although there was no difference in age and NIHSS at day 0 between the 2 groups, the MCA group had a lower day 3 NIHSS score compared with the ICA group ( P =0.006) in an ANCOVA. In addition, patients who had a MCA occlusion had lower day 1 and 3 NIHSS scores compared with the ICA group ( P =0.04 and P =0.03, respectively; Wilcoxon rank sum). Similarly, NIHSS was significantly lower in patients who recanalized on days 1 and 3 ( P =0.004 and P =0.003 respectively, Wilcoxon rank sum). When we adjusted for NIHSS score at day 0 in an ANCOVA, the adjusted mean was lower in the group that recanalized compared with the group that did not recanalize ( P 〈 0.001). There was a significant difference between the proportion of recanalization in the MCA group (15 of 17 recanalized, 88%) at 3 days after tPA compared with that of the ICA group (5 of 16 recanalized, 31%; P =0.001, Fisher exact test). The 3-month modified Rankin scale was not different between the 2 groups. Conclusions — Despite comparable age and NIHSS scores before IV tPA, MCA occlusions have lower day 1 and 3 NIHSS scores and higher proportion of recanalization compared with ICA occlusions. A combined IV/intra-arterial or mechanical thrombolysis may be needed to achieve early recanalization in ICA occlusions.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/01.STR.0000021001.18101.A5
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2002
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  • 7
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    Endovascular Versus Medical Management of Posterior Cerebral Artery Occlusion Stroke: The PLATO Study
    Ovid Technologies (Wolters Kluwer Health) ; 2023
    In:  Stroke Vol. 54, No. 7 ( 2023-07), p. 1708-1717
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 54, No. 7 ( 2023-07), p. 1708-1717
    Abstract: The optimal management of patients with isolated posterior cerebral artery occlusion is uncertain. We compared clinical outcomes for endovascular therapy (EVT) versus medical management (MM) in patients with isolated posterior cerebral artery occlusion. METHODS: This multinational case-control study conducted at 27 sites in Europe and North America included consecutive patients with isolated posterior cerebral artery occlusion presenting within 24 hours of time last well from January 2015 to August 2022. Patients treated with EVT or MM were compared with multivariable logistic regression and inverse probability of treatment weighting. The coprimary outcomes were the 90-day modified Rankin Scale ordinal shift and ≥2-point decrease in the National Institutes of Health Stroke Scale. RESULTS: Of 1023 patients, 589 (57.6%) were male with median (interquartile range) age of 74 (64–82) years. The median (interquartile range) National Institutes of Health Stroke Scale was 6 (3–10). The occlusion segments were P1 (41.2%), P2 (49.2%), and P3 (7.1%). Overall, intravenous thrombolysis was administered in 43% and EVT in 37%. There was no difference between the EVT and MM groups in the 90-day modified Rankin Scale shift (aOR, 1.13 [95% CI, 0.85–1.50]; P =0.41). There were higher odds of a decrease in the National Institutes of Health Stroke Scale by ≥2 points with EVT (aOR, 1.84 [95% CI, 1.35–2.52]; P =0.0001). Compared with MM, EVT was associated with a higher likelihood of excellent outcome (aOR, 1.50 [95% CI, 1.07–2.09]; P =0.018), complete vision recovery, and similar rates of functional independence (modified Rankin Scale score, 0–2), despite a higher rate of SICH and mortality (symptomatic intracranial hemorrhage, 6.2% versus 1.7%; P =0.0001; mortality, 10.1% versus 5.0%; P =0.002). CONCLUSIONS: In patients with isolated posterior cerebral artery occlusion, EVT was associated with similar odds of disability by ordinal modified Rankin Scale, higher odds of early National Institutes of Health stroke scale improvement, and complete vision recovery compared with MM. There was a higher likelihood of excellent outcome in the EVT group despite a higher rate of symptomatic intracranial hemorrhage and mortality. Continued enrollment into ongoing distal vessel occlusion randomized trials is warranted.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.123.042674
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2023
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  • 8
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    Abstract 62: Refining Angiographic Biomarkers of Reperfusion: Modified TICI Is Superior to TIMI for Predicting Clinical Outcomes After Intra-arterial Therapy
    Ovid Technologies (Wolters Kluwer Health) ; 2013
    In:  Stroke Vol. 44, No. suppl_1 ( 2013-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 44, No. suppl_1 ( 2013-02)
    Abstract: Background: Tissue reperfusion is a critical determinant of outcomes after intra-arterial therapy (IAT). However, there is no standardized method for grading angiographic reperfusion. We sought to compare the two most commonly used reperfusion scales, TIMI and modified TICI (m-TICI), for predicting good long-term outcome following IAT. Methods: From a multicenter database, we evaluated acute stroke patients presenting with middle cerebral artery (MCA) M1 occlusions who underwent IAT. Clinical and angiographic data were collected. Reperfusion for each case was graded using the TIMI and m-TICI scales. The primary distinction between these scales is that partial reperfusion (TIMI 2) is sub-divided into minor (m-TICI 2A: 〈 50%) and major (m-TICI 2B: 50-99%) grades in the m-TICI system. The performance of these scales for predicting a good 90-day outcome (mRS 0-2) was evaluated using the c-statistic. Results: There were 313 acute stroke patients with MCA M1 segment occlusions who underwent IAT at 6 academic centers; 171 (54.6%) were female. Mean age was 65.3±16.5 years. There were 157 (50.2%) right-sided strokes. Median baseline NIHSS score was 17 (IQR 15-20). Good outcome at 90 days was achieved in 32.5%. For predicting good outcome, the c-statistic was significantly higher for m-TICI (0.74 vs. 0.68; p 〈 0.0001). The threshold that maximized predictive accuracy was m-TICI ≥2B (sensitivity 78%, specificity 65%; figure). Conclusions: The modified TICI scale is superior to the TIMI scale for predicting clinical outcome after IAT, and should be the standard tool for grading angiographic reperfusion. An m-TICI score ≥2B (≥50% reperfusion) is the optimal biomarker for successful reperfusion.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.44.suppl_1.A62
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2013
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  • 9
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    Balloon Guide Catheter Improves Revascularization and Clinical Outcomes With the Solitaire Device : Analysis of the North American Solitaire Acute Stroke Registry
    Ovid Technologies (Wolters Kluwer Health) ; 2014
    In:  Stroke Vol. 45, No. 1 ( 2014-01), p. 141-145
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 45, No. 1 ( 2014-01), p. 141-145
    Abstract: Efficient and timely recanalization is an important goal in acute stroke endovascular therapy. Several studies demonstrated improved recanalization and clinical outcomes with the stent retriever devices compared with the Merci device. The goal of this study was to evaluate the role of the balloon guide catheter (BGC) and recanalization success in a substudy of the North American Solitaire Acute Stroke (NASA) registry. Methods— The investigator-initiated NASA registry recruited 24 clinical sites within North America to submit demographic, clinical, site-adjudicated angiographic, and clinical outcome data on consecutive patients treated with the Solitaire Flow Restoration device. BGC use was at the discretion of the treating physicians. Results— There were 354 patients included in the NASA registry. BGC data were reported in 338 of 354 patients in this subanalysis, of which 149 (44%) had placement of a BGC. Mean age was 67.3±15.2 years, and median National Institutes of Health Stroke Scale score was 18. Patients with BGC had more hypertension (82.4% versus 72.5%; P =0.05), atrial fibrillation (50.3% versus 32.8%; P =0.001), and were more commonly administered tissue plasminogen activator (51.6% versus 38.8%; P =0.02) compared with patients without BGC. Time from symptom onset to groin puncture and number of passes were similar between the 2 groups. Procedure time was shorter in patients with BGC (120±28.5 versus 161±35.6 minutes; P =0.02), and less adjunctive therapy was used in patients with BGC (20% versus 28.6%; P =0.05). Thrombolysis in cerebral infarction 3 reperfusion scores were higher in patients with BGC (53.7% versus 32.5%; P 〈 0.001). Distal emboli and emboli in new territory were similar between the 2 groups. Discharge National Institutes of Health Stroke Scale score (mean, 12±14.5 versus 17.5±16; P =0.002) and good clinical outcome at 3 months were superior in patients with BGC compared with patients without (51.6% versus 35.8%; P =0.02). Multivariate analysis demonstrated that the use of BGC was an independent predictor of good clinical outcome (odds ratio, 2.5; 95% confidence interval, 1.2–4.9). Conclusions— Use of a BGC with the Solitaire Flow Restoration device resulted in superior revascularization results, faster procedure times, decreased need for adjunctive therapy, and improved clinical outcome.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.113.002407
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2014
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  • 10
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    First Pass Effect : A New Measure for Stroke Thrombectomy Devices
    Ovid Technologies (Wolters Kluwer Health) ; 2018
    In:  Stroke Vol. 49, No. 3 ( 2018-03), p. 660-666
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 49, No. 3 ( 2018-03), p. 660-666
    Abstract: In acute ischemic stroke, fast and complete recanalization of the occluded vessel is associated with improved outcomes. We describe a novel measure for newer generation devices: the first pass effect (FPE). FPE is defined as achieving a complete recanalization with a single thrombectomy device pass. Methods— The North American Solitaire Acute Stroke Registry database was used to identify a FPE subgroup. Their baseline features and clinical outcomes were compared with non-FPE patients. Clinical outcome measures included 90-days modified Rankin Scale score, National Institutes of Health Stroke Scale score, mortality, and symptomatic intracranial hemorrhage. Multivariate analyses were performed to determine whether FPE independently resulted in improved outcomes and to identify predictors of FPE. Results— A total of 354 acute ischemic stroke patients underwent thrombectomy in the North American Solitaire Acute Stroke registry. FPE was achieved in 89 out of 354 (25.1%). More middle cerebral artery occlusions (64% versus 52.5%) and fewer internal carotid artery occlusions (10.1% versus 27.7%) were present in the FPE group. Balloon guide catheters were used more frequently with FPE (64.0% versus 34.7%). Median time to revascularization was significantly faster in the FPE group (median 34 versus 60 minutes; P =0.0003). FPE was an independent predictor of good clinical outcome (modified Rankin Scale score ≤2 was seen in 61.3% in FPE versus 35.3% in non-FPE cohort; P =0.013; odds ratio, 1.7; 95% confidence interval, 1.1–2.7). The independent predictors of achieving FPE were use of balloon guide catheters and non-internal carotid artery terminus occlusion. Conclusions— The achievement of complete revascularization from a single Solitaire thrombectomy device pass (FPE) is associated with significantly higher rates of good clinical outcome. The FPE is more frequently associated with the use of balloon guide catheters and less likely to be achieved with internal carotid artery terminus occlusion.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.117.020315
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
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