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  • Ovid Technologies (Wolters Kluwer Health)  (19)
  • Anderson, Craig S.  (19)
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  • Ovid Technologies (Wolters Kluwer Health)  (19)
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  • 1
    In: Journal of the American Heart Association, Ovid Technologies (Wolters Kluwer Health), Vol. 8, No. 13 ( 2019-07-02)
    Abstract: The uptake of proven stroke treatments varies widely. We aimed to determine the association of evidence‐based processes of care for acute ischemic stroke ( AIS ) and clinical outcome of patients who participated in the HEADPOST (Head Positioning in Acute Stroke Trial), a multicenter cluster crossover trial of lying flat versus sitting up, head positioning in acute stroke. Methods and Results Use of 8 AIS processes of care were considered: reperfusion therapy in eligible patients; acute stroke unit care; antihypertensive, antiplatelet, statin, and anticoagulation for atrial fibrillation; dysphagia assessment; and physiotherapist review. Hierarchical, mixed, logistic regression models were performed to determine associations with good outcome (modified Rankin Scale scores 0–2) at 90 days, adjusted for patient and hospital variables. Among 9485 patients with AIS, implementation of all processes of care in eligible patients, or “defect‐free” care, was associated with improved outcome (odds ratio, 1.40; 95% CI, 1.18–1.65) and better survival (odds ratio, 2.23; 95% CI , 1.62–3.09). Defect‐free stroke care was also significantly associated with excellent outcome (modified Rankin Scale score 0–1) (odds ratio, 1.22; 95% CI , 1.04–1.43). No hospital characteristic was independently predictive of outcome. Only 1445 (15%) of eligible patients with AIS received all processes of care, with significant regional variations in overall and individual rates. Conclusions Use of evidence‐based care is associated with improved clinical outcome in AIS . Strategies are required to address regional variation in the use of proven AIS treatments. Clinical Trial Registration URL : https://www.clinicaltrials.gov . Unique Identifier: NCT 02162017.
    Type of Medium: Online Resource
    ISSN: 2047-9980
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
    detail.hit.zdb_id: 2653953-6
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  • 2
    In: Neurology, Ovid Technologies (Wolters Kluwer Health), Vol. 84, No. 5 ( 2015-02-03), p. 464-471
    Type of Medium: Online Resource
    ISSN: 0028-3878 , 1526-632X
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2015
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  • 3
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 48, No. 7 ( 2017-07), p. 1877-1883
    Abstract: Many patients receiving thrombolysis for acute ischemic stroke are on prior antiplatelet therapy (APT), which may increase symptomatic intracerebral hemorrhage risk. In a prespecified subgroup analysis, we report comparative effects of different doses of intravenous alteplase according to prior APT use among participants of the international multicenter ENCHANTED study (Enhanced Control of Hypertension and Thrombolysis Stroke Study). Methods— Among 3285 alteplase-treated patients (mean age, 66.6 years; 38% women) randomly assigned to low-dose (0.6 mg/kg) or standard-dose (0.9 mg/kg) intravenous alteplase within 4.5 hours of symptom onset, 752 (22.9%) reported prior APT use. Primary outcome at 90 days was the combined end point of death or disability (modified Rankin Scale [mRS] scores, 2–6). Other outcomes included mRS scores 3 to 6, ordinal mRS shift, and symptomatic intracerebral hemorrhage by various standard criteria. Results— There were no significant differences in outcome between patients with and without prior APT after adjustment for baseline characteristics and management factors during the first week; defined by mRS scores 2 to 6 (adjusted odds ratio [OR], 1.01; 95% confidence interval [CI] , 0.81–1.26; P =0.953), 3 to 6 (OR, 0.95; 95% CI, 0.75–1.20; P =0.662), or ordinal mRS shift (OR, 1.03; 95% CI, 0.87–1.21; P =0.770). Alteplase-treated patients on prior APT had higher symptomatic intracerebral hemorrhage (OR, 1.82; 95% CI, 1.00–3.30; P =0.051) according to the safe implementation of thrombolysis in stroke-monitoring study definition. Although not significant ( P -trend, 0.053), low-dose alteplase tended to have better outcomes than standard-dose alteplase in those on prior APT compared with those not using APT (mRS scores of 2–6; OR, 0.84; 95% CI, 0.62–1.12 versus OR, 1.16; 95% CI, 0.99–1.36). Conclusions— Low-dose alteplase may improve outcomes in thrombolysis-treated acute ischemic stroke patients on prior APT, but this requires further evaluation in a randomized controlled trial. Clinical Trial Registration— URL: http://www.clinicaltrials.gov . Unique identifier: NCT01422616.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
    detail.hit.zdb_id: 1467823-8
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  • 4
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 53, No. 3 ( 2022-03), p. 779-787
    Abstract: In thrombolysis-eligible patients with acute ischemic stroke, there is uncertainty over the most appropriate systolic blood pressure (SBP) lowering profile that provides an optimal balance of potential benefit (functional recovery) and harm (intracranial hemorrhage). We aimed to determine relationships of SBP parameters and outcomes in thrombolyzed acute ischemic stroke patients. Methods: Post hoc analyzes of the ENCHANTED (Enhanced Control of Hypertension and Thrombolysis Stroke Study), a partial-factorial trial of thrombolysis-eligible and treated acute ischemic stroke patients with high SBP (150–180 mm Hg) assigned to low-dose (0.6 mg/kg) or standard-dose (0.9 mg/kg) alteplase and intensive (target SBP, 130–140 mm Hg) or guideline-recommended (target SBP 〈 180 mm Hg) treatment. All patients were followed up for functional status and serious adverse events to 90 days. Logistic regression models were used to analyze 3 SBP summary measures postrandomization: attained (mean), variability (SD) in 1–24 hours, and magnitude of reduction in 1 hour. The primary outcome was a favorable shift on the modified Rankin Scale. The key safety outcome was any intracranial hemorrhage. Results: Among 4511 included participants (mean age 67 years, 38% female, 65% Asian) lower attained SBP and smaller SBP variability were associated with favorable shift on the modified Rankin Scale (per 10 mm Hg increase: odds ratio, 0.76 [95% CI, 0.71–0.82]; P 〈 0.001 and 0.86 [95% CI, 0.76–0.98]; P =0.025) respectively, but not for magnitude of SBP reduction (0.98, [0.93–1.04]; P =0.564). Odds of intracranial hemorrhage was associated with higher attained SBP and greater SBP variability (1.18 [1.06–1.31]; P =0.002 and 1.34 [1.11–1.62]; P =0.002) but not with magnitude of SBP reduction (1.05 [0.98–1.14]; P =0.184). Conclusions: Attaining early and consistent low levels in SBP 〈 140 mm Hg, even as low as 110 to 120 mm Hg, over 24 hours is associated with better outcomes in thrombolyzed acute ischemic stroke patients. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT01422616.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
    detail.hit.zdb_id: 1467823-8
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  • 5
    In: Journal of Hypertension, Ovid Technologies (Wolters Kluwer Health), Vol. 39, No. 2 ( 2021-02), p. 280-285
    Abstract: Limited data exist on the optimum level of SBP in thrombolyzed patients with acute ischemic stroke (AIS). We aimed to determine the effects of intensive blood pressure (BP) lowering, specifically in patients with severe AIS who participated in the international, Enhanced Control of Hypertension and Thrombolysis Stroke Study. Methods: Prespecificed subgroup analyzes of the BP arm of Enhanced Control of Hypertension and Thrombolysis Stroke Study, a multicenter, partial–factorial, open, blinded outcome assessed trial, in which 2227 thrombolysis-eligible and treated AIS patients with elevated SBP ( 〉 150 mmHg) were randomized to intensive (target 130–140 mmHg) or guideline-recommended ( 〈 180 mmHg) BP management. Severe stroke was defined by computed tomography or magnetic resonance angiogram confirmation of large-vessel occlusion, receipt of endovascular therapy, final diagnosis of large artery atheromatous disease, or high ( 〉 10) baseline neurological scores on the National Institutes of Health Stroke Scale. The primary efficacy outcome was death or any disability (modified Rankin scale scores 2–6). The key safety outcome was intracranial hemorrhage (ICH). Treatment effects estimated in logistic regression models are reported as odds ratios (ORs) with 95% confidence intervals (CIs). Results: There were 1311 patients [mean age 67 years; 37% female; median baseline National Institutes of Health Stroke Scale of 11 (range 6.0–15.0)] with severe AIS. Overall, there was no significant difference in the primary outcome of death or disability. However, intensive BP lowering significantly increased mortality (OR 1.52, 95% CI 1.09–2.13; P  = 0.014) compared with guideline BP lowering, despite significantly lowering clinician-reported ICH (OR 0.63, 95% CI 0.43–0.92; P  = 0.016). Conclusion: Intensive BP lowering is associated with increased mortality in patients with severe AIS despite lowering the risk of ICH. Further randomized trials are required to provide reliable evidence over the optimum SBP target in the most serious type of AIS. Trial registration: ClinicalTrials.gov Identifier: NCT01422616.
    Type of Medium: Online Resource
    ISSN: 0263-6352 , 1473-5598
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 2017684-3
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  • 6
    In: Journal of Hypertension, Ovid Technologies (Wolters Kluwer Health), Vol. 39, No. 2 ( 2021-02), p. 273-279
    Abstract: As uncertainties exist over underlying causes, we aimed to define the characteristics and prognostic significance of low blood pressure (BP) early after the onset of acute stroke. Methods: Post hoc analyzes of the international Head Positioning in acute Stroke Trial (HeadPoST), a pragmatic cluster-crossover randomized trial of lying flat versus sitting up in stroke patients from nine countries during 2015–2016. Associations of baseline BP and death or dependency [modified Rankin scale (mRS) scores 3–6] and serious adverse events (SAEs) at 90 days were assessed in generalized linear mixed models with adjustment for multiple confounders. SBP and DBP was analysed as continuous measures fitted with a cubic spline, and as categorical measures with low ( 〈 10th percentile) and high (≥140 and ≥90 mmHg, respectively) levels compared with a normal range (≥10th percentile; 120–139 and 70–89 mmHg, respectively). Results: Among 11 083 patients (mean age 68 years, 39.9% women) with baseline BP values, 7.2 and 11.7% had low SBP ( 〈 120 mmHg) and DBP ( 〈 70 mmHg), respectively. Patients with low SBP were more likely to have preexisting cardiac and ischemic stroke and functional impairment, and to present earlier with more severe neurological impairment than other patients. Nonlinear ‘J-shaped’ relationships of BP and poor outcome were apparent: compared with normal SBP, those with low SBP had worse functional outcome (adjusted odds ratio 1.27, 95% confidence interval 1.02–1.58) and more SAEs, particularly cardiac events, with adjustment for potential confounders to minimize reverse causation. The findings were consistent for DBP and were stronger for ischemic rather than hemorrhagic stroke. Conclusion: The prognostic significance of low BP on poor outcomes in acute stroke was not explained by reverse causality from preexisting cardiovascular disease, and propensity towards greater neurological deficits and cardiac events. These findings provide support for the hypothesis that low BP exacerbates cardiac and cerebral ischemia in acute ischemic stroke.
    Type of Medium: Online Resource
    ISSN: 0263-6352 , 1473-5598
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
    detail.hit.zdb_id: 2017684-3
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  • 7
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 48, No. 9 ( 2017-09), p. 2605-2609
    Abstract: Renal dysfunction (RD) is associated with poor prognosis after stroke. We assessed the effects of RD on outcomes and interaction with low- versus standard-dose alteplase in a post hoc subgroup analysis of the ENCHANTED (Enhanced Control of Hypertension and Thrombolysis Stroke Study). Methods— A total of 3220 thrombolysis-eligible patients with acute ischemic stroke (mean age, 66.5 years; 37.8% women) were randomly assigned to low-dose (0.6 mg/kg) or standard-dose (0.9 mg/kg) intravenous alteplase within 4.5 hours of symptom onset. Six hundred and fifty-nine (19.8%) patients had moderate-to-severe RD (estimated glomerular filtration rate, 〈 60 mL/min per 1.73 m 2 ) at baseline. The impact of RD on death or disability (modified Rankin Scale scores, 2–6) at 90 days, and symptomatic intracerebral hemorrhage, was assessed in logistic regression models. Results— Compared with patients with normal renal function ( 〉 90 mL/min per 1.73 m 2 ), those with severe RD ( 〈 30 mL/min per 1.73 m 2 ) had increased mortality (adjusted odds ratio, 2.07; 95% confidence interval, 0.89–4.82; P =0.04 for trend); every 10 mL/min per 1.73 m 2 lower estimated glomerular filtration rate was associated with an adjusted 9% increased odds of death from thrombolysis-treated acute ischemic stroke. There was no significant association with modified Rankin Scale scores 2 to 6 (adjusted odds ratio, 1.03; 95% confidence interval, 0.62–1.70; P =0.81 for trend), modified Rankin Scale 3 to 6 (adjusted odds ratio, 1.20; 95% confidence interval, 0.72–2.01; P =0.44 for trend), or symptomatic intracerebral hemorrhage, or any heterogeneity in comparative treatment effects between low-dose and standard-dose alteplase by RD grades. Conclusions— RD is associated with increased mortality but not disability or symptomatic intracerebral hemorrhage in thrombolysis-eligible and treated acute ischemic stroke patients. Uncertainty persists as to whether low-dose alteplase confers benefits over standard-dose alteplase in acute ischemic stroke patients with RD. Clinical Trial Registration— URL: http://www.clinicaltrials.gov . Unique identifier: NCT01422616.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
    detail.hit.zdb_id: 1467823-8
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  • 8
    In: Neurology, Ovid Technologies (Wolters Kluwer Health), Vol. 88, No. 15 ( 2017-04-11), p. 1408-1414
    Abstract: To clarify associations between intracerebral hemorrhage (ICH) location and clinical outcomes among participants of the main phase Intensive Blood Pressure Reduction in Acute Cerebral Hemorrhage Trial (INTERACT2). Methods: Associations between ICH sites and poor outcomes (death [6] or major disability [3–5] of modified Rankin Scale) and European Quality of Life Scale (EQ-5D) utility scores at 90 days were assessed in logistic regression models. Results: Of 2,066 patients included in the analyses, associations were identified between ICH sites and poor outcomes: involvement of posterior limb of internal capsule increased risks of death or major disability (odds ratio [OR] 2.10) and disability (OR 1.81); thalamic involvement increased risks of death or major disability (OR 2.24) and death (OR 1.97). Involvement of the posterior limb of the internal capsule, thalamus, and infratentorial sites were each associated with poor EQ-5D utility score (≤0.7 [median] ; OR 1.87, 2.14, and 2.81, respectively). Posterior limb of internal capsule involvement was strongly associated with low scores across all health-related quality of life domains. ICH encompassing the thalamus and posterior limb of internal capsule were associated with death or major disability, major disability, and poor EQ-5D utility score (OR 1.72, 2.26, and 1.71, respectively). Conclusion: Poor clinical outcomes are related to ICH affecting the posterior limb of internal capsule, thalamus, and infratentorial sites. The highest association with death or major disability and poor EQ-5D utility score was seen in ICH encompassing the thalamus and posterior limb of internal capsule. ClinicalTrials.gov registration: NCT00716079.
    Type of Medium: Online Resource
    ISSN: 0028-3878 , 1526-632X
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
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  • 9
    In: Neurology: Clinical Practice, Ovid Technologies (Wolters Kluwer Health), Vol. 7, No. 4 ( 2017-08), p. 324-332
    Abstract: Seizures after ischemic stroke have not been well-studied. We aim to determine the frequency, determinants, and significance of early seizures after thrombolysis for acute ischemic stroke. Methods: Data are from the Enhanced Control of Hypertension and Thrombolysis Stroke Study (ENCHANTED), an international, multicenter, randomized controlled trial where patients with acute ischemic stroke were randomized to low-dose (0.6 mg/kg) or standard-dose (0.9 mg/kg) IV alteplase. The protocol prespecified prospective data collection on in-hospital seizures over 7 days postrandomization. Logistic regression models were used to determine variables associated with seizures and their significance on poor outcomes of death or disability (modified Rankin scale scores 3–6), symptomatic intracerebral hemorrhage (sICH), and European Quality of Life 5-Dimensions questionnaire [EQ-5D] over 90 days. Results: Data were available for 3,139 acute ischemic stroke participants, of whom 42 (1.3%) had seizures at a median 22.7 hours after the onset of symptoms. Baseline variables associated with seizures were male sex (odds ratio [OR] 2.19, 95% confidence interval [CI] 1.07–4.50), severe neurologic impairment (NIH Stroke Scale score ≥10; OR 2.16, 95% CI 1.06–4.40), and fever (OR 4.55, 95% CI 2.37–8.71). Seizures independently predicted poor recovery: death or major disability (OR 2.88, 95% CI 1.28–6.47), unfavorable ordinal shift of mRS scores (OR 1.94, 95% CI 1.10–3.39), and lower than median EQ-5D health utility index score (OR 3.50, 95% CI 1.37–8.91). There was no association of seizures with sICH in adjusted analysis. Conclusions: In thrombolysis-treated patients with acute ischemic stroke, seizures are uncommon, occur early, and predict poor recovery. Clinicaltrials.gov identifier: NCT01422616.
    Type of Medium: Online Resource
    ISSN: 2163-0402 , 2163-0933
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
    detail.hit.zdb_id: 2645818-4
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  • 10
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 47, No. 5 ( 2016-05), p. 1227-1232
    Abstract: In patients with acute intracerebral hemorrhage (ICH), the shape and density of the hematoma are associated with its subsequent growth, but the impact of these parameters on clinical outcome is uncertain. Methods— Baseline computed tomographic scans and clinical data were obtained in the Intensive Blood Pressure Reduction in Acute Intracerebral Hemorrhage Trial (INTERACT2). Three independent neurologists blind to clinical data assessed ICH for shape and density using a previously described scale. Shape was defined as irregular when the ICH had ≥2 extra lesions added to the ellipsoid-shaped ICH. Density was heterogeneous when there were ≥3 low-density lesions within the ICH. Outcome measures were death and major disability (modified Rankin scale score of 3–5), combined and separate at 90-day postrandomization. Multivariable logistic regression models were used to determine the significance of hematoma characteristics on outcome. Results— There were 2066 patient computed tomographic scans included in the analysis, with 46% and 38% having irregular and heterogeneous ICH, respectively. Irregular shape was independently associated with death/major disability (adjusted odds ratio, 1.60; 95% confidence interval [CI], 1.29–1.98) and major disability alone (adjusted odds ratio, 1.60; 95% CI, 1.31–1.95), but not with death alone (adjusted odds ratio, 0.97; 95% CI, 0.68–1.39). Heterogeneous density was not associated with clinical outcomes (adjusted odds ratio, 1.06; 95% CI, 0.85–1.33), 1.04 (95% CI, 0.73–1.48), and 1.14 (95% CI, 0.93–1.39), respectively, for death/major disability, death alone, and disability alone). Conclusions— Irregular shape, but not heterogeneous density, is independently associated with poor outcome after ICH. Clinical Trial Registration— URL: http://www.clinicaltrials.gov . Unique identifier: NCT00716079.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2016
    detail.hit.zdb_id: 1467823-8
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