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  • Park, Sang-Soon  (33)
  • Medizin  (33)
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  • Medizin  (33)
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  • 1
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. 2 ( 2019-02), p. 365-372
    Kurzfassung: Randomized trials comparing the use of multimodal magnetic resonance imaging (MRI) to multimodal computed tomography (CT)/ CT angiography (CTA) for selecting candidates for endovascular therapy (EVT) have not been reported. This study aimed to elucidate whether MRI-based selection for EVT is safe and effective within and after a 6-hour time window compared with conventional CTA-based selection. Methods— Data from a prospective, nationwide, multicenter stroke registry were analyzed. Workflow timelines were compared between patients selected for EVT based on MRI (the MRI group) and CTA (the CTA group). Multivariable ordinal and binary logistic regression analyses were performed to explore the relationships between decision imaging for EVT and clinical outcomes, including good and excellent outcomes (modified Rankin Scale scores of 0–2 and 0–1, respectively) at 3-month, modified Rankin Scale score distributions and safety outcomes (symptomatic intracranial hemorrhage [SICH] and mortality). Results— Ultimately, 1265 patients (age, 69±12 yrs; men, 55%) were enrolled in this study. The median National Institutes of Health Stroke Scale score was 15 (11–19). All workflow time metrics were significantly delayed in the MRI group compared with the CTA group. There was no difference in good 3-month outcomes in patients arriving within 6 hours of onset between the MRI and CTA groups (38.1% versus 38.5%), but SICH and mortality rates were lower in the MRI group than the CTA group (3.8% versus 7.7%, P =0.01 for SICH; 15.4% versus 20.9%, P =0.04 for mortality). In the multivariable analysis, decision imaging was not significantly associated with 3-month functional outcomes (all P 〉 0.1) or mortality ( P =0.051); however, the MRI group was less likely to develop SICH than the CTA group ( P =0.01; odds ratio, 0.34 [95% CI, 0.17–0.77]). Conclusions— Our study found MRI-based selection for EVT was not associated with improving functional outcome compared with CT-based selection, but may be better at reducing the risk of SICH, despite the delays in all workflow time metrics.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2019
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. 1 ( 2019-01), p. 101-109
    Kurzfassung: This study aimed to compare the effectiveness of dual antiplatelet therapy with clopidogrel-aspirin to that of aspirin monotherapy in patients with acute minor cerebral ischemia using a prospective, nationwide, multicenter, stroke registry database in South Korea. Methods— CHANCE trial (Clopidogrel in High-Risk Patients With Acute Nondisabling Cerebrovascular Events)-like patients who met eligibility criteria modeled on the CHANCE trial eligibility criteria, including (1) acute minor ischemic stroke defined as National Institutes of Health Stroke Scale score ≤3 or lesion positive transient ischemic attack within 24 hours of onset and (2) noncardioembolic stroke mechanism. Propensity scores using the inverse probability of treatment weighting was used to adjust for baseline imbalances. The primary outcome was the composite of all stroke (ischemic and hemorrhagic), myocardial infarction, and vascular death by 3 months. Results— Among 5590 patients meeting the eligibility criteria, age was 64±13 year and 62.6% were male. Aspirin and combination of clopidogrel-aspirin were administered in 66.1% and 33.9% of patients, respectively. In unadjusted analysis, rates of the 3-month primary vascular event outcome were lower with clopidogrel-aspirin versus aspirin, 9.9% versus 12.2% (hazard ratio, 0.79 [0.67–0.95]). In propensity-weighted Cox proportional hazards regression with robust estimation, clopidogrel-aspirin was associated with a lower risk of the primary vascular event outcome (hazard ratio, 0.76 [0.63–0.92] ) and all stroke events (hazard ratio, 0.74 [0.61–0.90]). Among 6 predefined subgroup analyses, 3 showed potential modification of treatment effect, with lesser benefit associated with the absence of prior antiplatelet use ( P interaction =0.01) and younger age ( 〈 75 years, P interaction =0.07), and absence of benefit associated with small vessel occlusion subtype ( P interaction =0.08). Conclusions— Dual antiplatelet therapy with aspirin and clopidogrel was associated with reduced stroke, myocardial infarction, and vascular death in the 3 months following a presenting minor, noncardioembolic ischemic stroke. Benefits may be particularly magnified in patients with a history of prior antiplatelet therapy, older age, and nonsmall vessel disease stroke mechanism.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2019
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 53, No. 9 ( 2022-09), p. 2976-2987
    Kurzfassung: The expected growth of stroke burden in Korea in early 2000s led to the initiation of a government-funded clinical research project with the goal of development and implementation of national stroke guidelines. The CRCS-K (Clinical Research Collaboration for Stroke in Korea) began as a part of this project. For stroke epidemiology and quality of care research, the CRCS-K developed a multicenter, prospective, stroke registry and began collection of data in 2008. Now, about 100 000 cases have been registered at 17 university hospitals or regional stroke centers and about 200 articles have been published based on the registry experience. The analysis of the 10-year secular trends showed overall improvement of stroke care and outcomes and areas for improvement. This large-scale, high-quality dataset provides opportunities to explore and compare treatment disparities using the comparative effectiveness research methods, design and conduct a registry-based randomized clinical trial, connect the registry data with other data sources including the national claims data and neuroimaging or genetic data, and collaborate with other international researchers. An international stroke registry consortium may be a viable future direction.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2022
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    In: Neurology, Ovid Technologies (Wolters Kluwer Health), Vol. 94, No. 9 ( 2020-03-03), p. e978-e991
    Kurzfassung: Stroke is a devastating and costly disease; however, there is a paucity of information on long-term costs and on how they differ according to 3-month modified Rankin scale (mRS) score, which is a primary outcome variable in acute stroke intervention trials. Methods We analyzed a prospective multicenter stroke registry (Clinical Research Collaboration for Stroke in Korea) database through linkage with claims data from the National Health Insurance Service with follow-up to December 2016. Healthcare expenditures were converted into daily cost individually, and annual and cumulative costs up to 5 years were estimated and compared according to the 3-month mRS score. Results Between January 2011 and November 2013, 11,136 patients were enrolled in the study. The mean age was 68 years, and 58% were men. The median follow-up period was 3.9 years (range 0–5 years). Mean cumulative cost over 5 years was $117,576 (US dollars [USD]); the cost in the first year after stroke was the highest ($38,152 USD), which increased markedly from the cost a year before stroke ($8,718 USD). The mean 5-year cumulative costs differed significantly according to the 3-month mRS score ( p 〈 0.001); the costs for a 3-month mRS score of 0 or 5 were $53,578 and $257,486 USD, respectively. Three-month mRS score was an independent determinant of long-term costs after stroke. Conclusions We show that 3-month mRS score plays an important role in the prediction of long-term costs after stroke. Such estimates relating to 3-month mRS categories may be valuable when undertaking health economic evaluations related to stroke care.
    Materialart: Online-Ressource
    ISSN: 0028-3878 , 1526-632X
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2020
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    In: Neurology, Ovid Technologies (Wolters Kluwer Health), Vol. 94, No. 19 ( 2020-05-12)
    Materialart: Online-Ressource
    ISSN: 0028-3878 , 1526-632X
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2020
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. 11 ( 2019-11), p. 3147-3155
    Kurzfassung: This study aimed to compare the effectiveness of dual antiplatelet therapy with clopidogrel plus aspirin (DAPT) with that of aspirin monotherapy (AM) in patients with acute, nonminor, and noncardioembolic stroke. Methods— Using a prospective, nationwide, multicenter stroke registry database, acute (within 24 hours of onset), nonminor (baseline National Institutes of Health Stroke Scale score, 4–15), and noncardioembolic stroke patients were identified. Propensity scores using inverse probability of treatment weighting were used to adjust baseline imbalances between the DAPT and AM groups. A primary outcome measure was a composite of all types of stroke (ischemic and hemorrhagic), myocardial infarction, and all-cause mortality within 3 months of stroke onset. Results— Among the 4461 patients meeting the eligibility criteria (age, 69±13 years; men, 57.7%), 52.5% (n=2340) received AM, and 47.5% (n=2121) received DAPT. The primary outcome event was not significantly different between the DAPT group and the AM group (20.9% versus 22.6%, P =0.13). The event rates of all types of stroke were also not different between the 2 groups (19.3% versus 20.1%, P =0.35), while all-cause mortality was significantly lower in the DAPT group than in the AM group (3.4% versus 4.9%, P =0.02). In the propensity-weighted Cox proportional hazards models with robust estimation, DAPT did not reduce the risk of the primary outcome event (hazards ratio, 0.91; 95% CI, 0.79–1.04) but did reduce the risk of all-cause mortality (0.69; 0.49–0.97). There was no treatment heterogeneity among the predefined subgroups, although the potential benefits of DAPT were suggested in subpopulations of moderate-to-severe relevant arterial stenosis and relatively severe deficits (National Institutes of Health Stroke Scale score, 12–15). Conclusions— Compared to AM, clopidogrel plus aspirin did not reduce the risk of the primary outcome event during the first 3 months after a nonminor, noncardioembolic, ischemic stroke.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2019
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 49, No. 1 ( 2018-01), p. 46-53
    Kurzfassung: This study aimed to investigate whether pulse pressure (PP) obtained during the acute stage of ischemic stroke can be used as a predictor for future major vascular events. Methods— Using a multicenter prospective stroke registry database, patients who were hospitalized for ischemic stroke within 48 hours of onset were enrolled in this study. We analyzed blood pressure (BP) data measured during the first 3 days from onset. Primary and secondary outcomes were time to a composite of stroke recurrence, myocardial infarction, all-cause death, and time to stroke recurrence, respectively. Results— Of 9840 patients, 4.3% experienced stroke recurrence, 0.2% myocardial infarction, and 7.3% death during a 1-year follow-up period. In Cox proportional hazards models including both linear and quadratic terms of PP, PP had a nonlinear J-shaped relationship with primary (for a quadratic term of PP, P =0.004) and secondary ( P 〈 0.001) outcomes. The overall effects of PP and other BP parameters on primary and secondary outcomes were also significant ( P 〈 0.05). When predictive power of BP parameters was compared using a statistic of −2 log-likelihood differences, PP was a stronger predictor than systolic BP (8.49 versus 5.91; 6.32 versus 4.56), diastolic BP (11.42 versus 11.05; 10.07 versus 4.56), and mean atrial pressure (8.75 versus 5.91; 7.03 versus 4.56) for the primary and secondary outcomes, respectively. Conclusions— Our study shows that PP when measured in the acute period of ischemic stroke has nonlinear J-shaped relationships with major vascular events and stroke recurrence, and may have a stronger predictive power than other commonly used BP parameters.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2018
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 54, No. Suppl_1 ( 2023-02)
    Kurzfassung: Introduction: Perfusion imaging (PI) could guide decision-making for endovascular treatment (EVT) of acute ischemic stroke (AIS). However, PI was underused even in the US before the pivotal EVT trials proved its usefulness in 2018. This study aimed to describe the secular trends of PI utilization and investigate the effectiveness of PI-based EVT in real-world practice. Methods: Using a prospective multicenter (n=17) stroke registry in South Korea, we identified patients with AIS who presented within 24 hours from onset between 2011 and 2021. The study period was divided into 3 epochs: 2011-2014, 2015-2017, and 2018-2021. The study population was divided into the early (arrival within 6 hours) and late window (6-24 hours) groups. Results: A total of 51,650 patients (15,654 patients in 2011-2014, 14,432 patients in 2015-2017, and 21,564 patients in 2018-2021) were analyzed. Utilization of PI decreased in the overall population and early window group ( P trend 〈 0.001); 43.3% and 54.1% in 2011-2014, 40.1% and 44.1% in 2015-2017, and 38.4% and 40.2% in 2018-2021, respectively; but increased in the late window group ( P trend 〈 0.001); 31.3% in 2011-2014, 35.7% in 2015-2017, and 36.5% in 2018-2021. Of 10,872 patients with anterior large-vessel occlusion (aLVO), the EVT rate was not different between patients with and without PI (48.7% vs. 46.6%, P =0.08) in the early window but higher in those with PI than without PI in the late window (29.8% vs. 18.7%, P 〈 0.001). The EVT outcome (3-month mRS 0-2) was not different between patients with and without PI in the early window (44.1% vs. 41.8%, P =0.21) and late window (38.4% vs. 39.2%, P =0.81). Propensity score analysis and instrumental variable analysis with PI rate per center as an instrument will be performed to adjust imbalances between patients with and without PI. Conclusion: Between 2011 and 2021 in South Korea, PI utilization has decreased in patients arriving within 6 hours from onset but has increased in those arriving between 6 and 24 hours. Among patients with aLVO, PI likely increased the EVT rate in the late window but did not in the early window. PI utilization did not seem to affect the EVT outcomes, but in-depth analysis is required.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2023
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 52, No. Suppl_1 ( 2021-03)
    Kurzfassung: Background: The significance of silent brain infarction (SBI) for stroke recurrence in acute ischemic stroke (AIS) patients with atrial fibrillation (AF) has yet to be elucidated. This study aims to evaluate SBI as an independent predictor and which characteristics of SBI are associated with stroke recurrence in AIS patients with AF. Methods: A multicenter prospective cohort recruited AIS patients with non-valvular AF from 14 centers from Oct 2017 to Dec 2018, and followed for ischemic stroke recurrence, all types of stroke and TIA, and all-cause mortality. Three patient groups; stroke patients with prior stroke history (PS), first-ever stroke with SBI [F-SBI(+)] and first-ever stroke without SBI [F-SBI(-)] were compared with Cox frailty model according to predetermined covariates. SBI subtypes; embolic-appearing pattern (EAP) and non-EAP, and SBI characteristics; size, numbers, and vascular territory involvements were assessed. Results: A total of 978 AF-AIS patients [27.5% PS, 29.1% F-SBI(+), 43.4% F-SBI(-)] were followed for 365 [348-374] days (median). Incidence of ischemic stroke recurrence in F-SBI(+) was higher than F-SBI(-), however, there was no significant difference compared to PS (p=0.860). Adjusted hazards for ischemic stroke recurrence and all kinds of stroke and TIA in F-SBI(+) were shown to be elevated [HR 3.87 (95% CI 1.53-9.16) and 2.60 (1.21-5.56)], and similar to PS [4.20 (1.73-10.24) and 2.90 (1.36-6.18)] when compared to F-SBI(-), respectively. Despite irrelevance in non-EAP SBI, a 4-fold increase of hazards in EAP SBI was observed [4.07 (1.63-10.13)]. Other SBI characteristics were not associated with outcomes. SBI and SBI features did not increase all-cause mortality. Conclusions: SBI and specifically, EAP SBI elevated stroke recurrence in AF-AIS patients as much prior stroke has increased the risk. Considering SBI to predict recurrence is suggested likewise prior stroke history is scored in AF thromboembolic risk estimation tools.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2021
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 49, No. Suppl_1 ( 2018-01-22)
    Kurzfassung: Backgrounds: Previous studies demonstrated the association of resting heart rate with cardiovascular outcomes while there were only few evidence for patients who experienced ischemic stroke. As atrial fibrillation (AF) is characterized by rapidity and irregularity of heart rate, heart rate characteristics might be a predictor for future vascular event in patients with AF acute ischemic stroke. Methods: From a multicenter prospective registry of stroke patients, acute ischemic stroke patients with AF who admitted within 48 hours after stroke onset were included. Heart rate data during the first 24 hours after admission were collected and level and variability of heart rate were assessed by mean and coefficient of variation (CV). Primary outcome was a composite of stroke recurrence, myocardial infarction and all-cause death, which was prospectively captured until 1 year after stroke onset. Results: A total of 2,046 patients were included for the final analysis. There were 102 (5.0%) stroke recurrence, 9 (0.4%) myocardial infarction and 440 (21.5%) death events within 1 year after stroke onset. Proportional hazards regression models were constructed and the non-linearity of effects of heart rate parameters were examined for outcome events. Among all the associations, effects of mean heart rate on primary outcome and all-cause mortality were non-linear ( p’s for quadratic effect = 0.017 and 0.032, respectively). The overall effects were significant only for effects of mean heart rate on primary outcome and all-cause mortality (P =0.013 and P=0.006, respectively). Effects of CV on outcome variables were not significant. Conclusion: This study suggests that mean heart rate during the first day of hospitalization was a predictor of future vascular events in AF patients presenting with acute ischemic stroke and the association seems to be non-linear ‘J shaped’. However, heart rate variability did not affect.
    Materialart: Online-Ressource
    ISSN: 0039-2499 , 1524-4628
    RVK:
    Sprache: Englisch
    Verlag: Ovid Technologies (Wolters Kluwer Health)
    Publikationsdatum: 2018
    ZDB Id: 1467823-8
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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