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  • Bae, Hee-Joon  (15)
  • Lee, Byung-Chul  (15)
  • Lee, Ji Sung  (15)
  • 2015-2019  (15)
  • Medicine  (15)
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  • 2015-2019  (15)
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  • Medicine  (15)
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  • 1
    Online Resource
    Online Resource
    Different Antiplatelet Strategies in Patients With New Ischemic Stroke While Taking Aspirin
    Ovid Technologies (Wolters Kluwer Health) ; 2016
    In:  Stroke Vol. 47, No. 1 ( 2016-01), p. 128-134
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 47, No. 1 ( 2016-01), p. 128-134
    Abstract: Selecting among different antiplatelet strategies when patients experience a new ischemic stroke while taking aspirin is a common clinical challenge, currently addressed by a paucity of data. Methods— This study is an analysis of a prospective multicenter stroke registry database from 14 hospitals in South Korea. Patients with acute noncardioembolic stroke, who were taking aspirin for prevention of ischemic events at the time of onset of stroke, were enrolled. Study subjects were divided into 3 groups according to the subsequent antiplatelet therapy strategy pursued; maintaining aspirin monotherapy (MA group), switching aspirin to nonaspirin antiplatelet agents (SA group), and adding another antiplatelet agent to aspirin (AA group). The primary study end point was the composite of stroke (ischemic and hemorrhagic), myocardial infarction, and vascular death up to 1 year after stroke onset. Results— A total of 1172 patients were analyzed for this study. Antiplatelet strategies pursued in study patients were MA group in 212 (18.1%), SA group in 246 (21.0%), and AA group in 714 (60.9%). The Cox proportional hazards regression analysis showed that, compared with the MA group, there was a reduction in the composite vascular event primary end point in the SA group (hazard ratio, 0.50; 95% confidence interval, 0.27–0.92; P =0.03) and in the AA group (hazard ratio, 0.40; 95% confidence interval, 0.24–0.66; P 〈 0.001). Conclusions— This study showed that, compared with maintaining aspirin, switching to or adding alternative antiplatelet agents may be better in preventing subsequent vascular events in patients who experienced a new ischemic stroke while taking aspirin.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.115.011595
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2016
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  • 2
    Online Resource
    Online Resource
    Clinical Outcomes of Posterior Versus Anterior Circulation Infarction With Low National Institutes of Health Stroke Scale Scores
    Ovid Technologies (Wolters Kluwer Health) ; 2017
    In:  Stroke Vol. 48, No. 1 ( 2017-01), p. 55-62
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 48, No. 1 ( 2017-01), p. 55-62
    Abstract: We compared baseline characteristics and outcomes at 3 months between patients with minor anterior circulation infarction (ACI) versus minor posterior circulation infarction (PCI), including the influence of large vessel disease on outcomes. Methods— This study is an analysis of a prospective multicenter registry database in South Korea. Eligibility criteria were patients with ischemic stroke admitted within 7 days of stroke onset, lesions in either anterior or posterior circulation, and National Institutes of Health Stroke Scale score of ≤4 at baseline. Patients were divided into 4 groups for further analysis: minor ACI with and without internal carotid artery/middle cerebral artery large vessel disease and minor PCI with and without vertebrobasilar large vessel disease. Results— A total of 7178 patients (65.2±12.6 years) were analyzed in this study, and 2233 patients (31.1%) had disability (modified Rankin Scale score 2–6) at 3 months. Disability was 32.3% in minor PCI and 30.3% in minor ACI ( P =0.07), and death was 1.3% and 1.5%, respectively ( P =0.82). In a multivariable logistic regression analysis, minor PCI was significantly associated with disability at 3 months when compared with minor ACI (odds ratio, 1.23; 95% confidence interval, 1.09–1.37; P 〈 0.001). In pairwise comparisons, minor PCI with vertebrobasilar large vessel disease was independently associated with disability at 3 months, compared with the other 3 groups. Conclusions— Our study showed that minor PCI exhibited more frequent disability at 3 months than minor ACI. Especially, the presence of vertebrobasilar large vessel disease in minor PCI had a substantially higher risk of disability. Our results suggest that minor PCI with vertebrobasilar large vessel disease could require more meticulous care and are important targets for further study.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.116.013432
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
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  • 3
    Online Resource
    Online Resource
    Impact of Guidelines on Clinical Practice : Intravenous Heparin Use for Acute Ischemic Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2016
    In:  Stroke Vol. 47, No. 6 ( 2016-06), p. 1577-1583
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 47, No. 6 ( 2016-06), p. 1577-1583
    Abstract: Since its introduction, controversy has existed about the administration of intravenous heparin for the treatment of acute ischemic stroke. We studied trends in the intravenous heparin use during a 6-year time period and the potential influence of clinical guidelines in national language on intravenous heparin administration in Korea. Methods— On the basis of a prospective nationwide multicenter stroke registry, we collected data on patients with acute ischemic stroke who arrived within 7 days of symptom onset during the time period 2008 to 2013. We studied patient demographics, prestroke medical history, stroke characteristics, and stroke treatment. Data from a total of 23 425 patients from 12 university hospitals or regional stroke centers were analyzed. Results— The administration of intravenous heparin steadily decreased throughout the study period: 9.7% in 2008, 10.9% in 2009, 9.4% in 2010, 6.0% in 2011, 4.7% in 2012, and 4.3% in 2013 ( P for trend 〈 0.001). The reduced intravenous heparin use was associated with moderate stroke severity, atrial fibrillation, and stroke of cardioembolic, other-, and undetermined etiology. In a multivariable logistic model, increase of 1 calendar year (odds ratio, 0.89; 95% confidence interval, 0.84–0.95; P 〈 0.001) and release of clinical practice guidelines in Korean (odd ratio, 0.74; 95% confidence interval, 0.59–0.91; P 〈 0.01) were independent factors associated with reduction in the frequency of intravenous heparin use. Conclusions— Use of intravenous heparin for acute ischemic stroke treatment has decreased in Korea, and this change may be attributable to the spread and successful implementation of regional clinical practice guidelines.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.116.012639
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2016
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  • 4
    Online Resource
    Online Resource
    Abstract TMP89: Early Heart Rate as an Outcome Predictor in Atrial Fibrillation Related Acute Ischemic Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2018
    In:  Stroke Vol. 49, No. Suppl_1 ( 2018-01-22)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 49, No. Suppl_1 ( 2018-01-22)
    Abstract: 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.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.49.suppl_1.TMP89
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
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  • 5
    Online Resource
    Online Resource
    Abstract 71: The Impact of 3-month Functional Outcome on Healthcare Expenditure During the 5 Years After Acute Ischemic Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2019
    In:  Stroke Vol. 50, No. Suppl_1 ( 2019-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. Suppl_1 ( 2019-02)
    Abstract: Background and Purpose: Stroke is one of the most devastating and costly health problems of today. However, there is lack of knowledge about how costly it is in a long-term perspective and how much the long-term cost differs according to 3-month functional outcome, a major primary outcome variable of acute stroke intervention trials. Methods: Acute ischemic stroke patients who were registered into the multi-center stroke registry (Clinical Research Collaboration for Stroke in Korea, CRCS-K) in South Korea between 2011 and 2013 were matched to the National Health Insurance Service claim database. All the healthcare expenditure was extracted from the claim database and converted into daily cost of each individual. Yearly expenditures and cumulative expenditure up to 5 yeas were obtained and expressed in US dollars and were compared according to 3-month functional outcome (modified Rankin disability scale, mRS).Results: A total of 11,136 acute ischemic stroke patients (mean age, 68 years; men 58%) were analyzed. The median follow-up period was 1,418 days. The mean cumulative healthcare expenditure over 5 years was $74,295 (SD, $91,049) and showed a dramatic increment during the first month followed by a constant increase without a considerable change. The mean 5-year cumulative expenditure differed significantly according to 3-month functional outcome; $32,261 in those with 3-month mRS 0 and $163,244 in those with 3-month mRS 5. After adjusting for the selected potential confounders, the yearly expenditures and the cumulative one at each time point differed significantly according to 3-month mRS scores. Figure given below is showing the median 5-year cumulative daily expenditure by 3-month mRS. Conclusions: This study shows that the impact of 3-month functional outcome on the long-term healthcare expenditure following acute ischemic stroke may be more than expected. The efforts for improving functional outcomes are urgent.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.50.suppl_1.71
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
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  • 6
    Online Resource
    Online Resource
    Magnetic Resonance Imaging Versus Computed Tomography Angiography Based Selection for Endovascular Therapy in Patients With Acute Ischemic Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2019
    In:  Stroke Vol. 50, No. 2 ( 2019-02), p. 365-372
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. 2 ( 2019-02), p. 365-372
    Abstract: 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.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.118.023173
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
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  • 7
    Online Resource
    Online Resource
    One-Year Outcomes After Minor Stroke or High-Risk Transient Ischemic Attack : Korean Multicenter Stroke Registry Analysis
    Ovid Technologies (Wolters Kluwer Health) ; 2017
    In:  Stroke Vol. 48, No. 11 ( 2017-11), p. 2991-2998
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 48, No. 11 ( 2017-11), p. 2991-2998
    Abstract: Patients with minor ischemic stroke or transient ischemic attack are at high risk of recurrent stroke and vascular events, which are potentially disabling or fatal. This study aimed to evaluate contemporary subsequent vascular event risk after minor ischemic stroke or transient ischemic attack in Korea. Methods— Patients with minor ischemic stroke or high-risk transient ischemic attack admitted within 7 days of symptom onset were identified from a Korean multicenter stroke registry database. We estimated 3-month and 1-year event rates of the primary outcome (composite of stroke recurrence, myocardial infarction, or all-cause death), stroke recurrence, a major vascular event (composite of stroke recurrence, myocardial infarction, or vascular death), and all-cause death and explored differences in clinical characteristics and event rates according to antithrombotic strategies at discharge. Results— Of 9506 patients enrolled in this study, 93.8% underwent angiographic assessment and 72.7% underwent cardiac evaluations; 25.1% had symptomatic stenosis or occlusion of intracranial arteries. At discharge, 95.2% of patients received antithrombotics (antiplatelet polytherapy, 37.1%; anticoagulation, 15.3%) and 86.2% received statins. The 3-month cumulative event rate was 5.9% for the primary outcome, 4.3% for stroke recurrence, 4.6% for a major vascular event, and 2.0% for all-cause death. Corresponding values at 1 year were 9.3%, 6.1%, 6.7%, and 4.1%, respectively. Patients receiving nonaspirin antithrombotic strategies or no antithrombotic agent had higher baseline risk profiles and at least 1.5× higher event rates for clinical event outcomes than those with aspirin monotherapy. Conclusions— Contemporary secondary stroke prevention strategies based on thorough diagnostic evaluation may contribute to the low subsequent vascular event rates observed in real-world clinical practice in Korea.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.117.018045
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
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  • 8
    Online Resource
    Online Resource
    Predictive Value of Pulse Pressure in Acute Ischemic Stroke for Future Major Vascular Events
    Ovid Technologies (Wolters Kluwer Health) ; 2018
    In:  Stroke Vol. 49, No. 1 ( 2018-01), p. 46-53
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 49, No. 1 ( 2018-01), p. 46-53
    Abstract: 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.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.117.019582
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
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  • 9
    Online Resource
    Online Resource
    Trajectory Groups of 24-Hour Systolic Blood Pressure After Acute Ischemic Stroke and Recurrent Vascular Events
    Ovid Technologies (Wolters Kluwer Health) ; 2018
    In:  Stroke Vol. 49, No. 8 ( 2018-08), p. 1836-1842
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 49, No. 8 ( 2018-08), p. 1836-1842
    Abstract: Blood pressure dynamics in patients with acute ischemic stroke may serve as an important modifiable and prognostic factor. Methods— A total of 8376 patients with acute ischemic stroke were studied from a prospective multicenter registry. Patients were eligible if they had been admitted within 24 hours of symptom onset and had ≥5 systolic blood pressure (SBP) measurements during the first 24 hours of hospitalization. SBP trajectory groups in the first 24 hours were identified using the TRAJ procedure in SAS software with delta-Bayesian Information Criterion and prespecified modeling parameters. Vascular events, including recurrent stroke, myocardial infarction, and death, were prospectively collected. The risk of having vascular events was calculated using the frailty model to adjust for clustering by hospital. Results— The group-based trajectory model classified patients with acute ischemic stroke into 5 SBP trajectory groups: low (22.3%), moderate (40.8%), rapidly stabilized (11.9%), acutely elevated (18.5%), and persistently high (6.4%) SBP. The risk of having vascular events was increased in the acutely elevated (hazard ratio, 1.28 [95% confidence interval, 1.12–1.47]) and the persistently high SBP groups (hazard ratio, 1.67 [95% confidence interval, 1.37–2.04] ) but not in the rapidly stabilized group (hazard ratio, 1.13 [95% confidence interval, 0.95–1.34]), when compared with the moderate SBP group. Conclusions— SBP during the first 24 hours after acute ischemic stroke may be categorized into distinct trajectory groups, which differ in relation to stroke characteristics and frequency of subsequent recurrent vascular event risks. The findings may help to recognize potential candidates for future blood pressure control trials.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.118.021117
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
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  • 10
    Online Resource
    Online Resource
    Abstract WP76: Utility of Individual NIH Stroke Scale Items as a Predictor of Functional Outcomes in Acute Ischemic Stroke Patients Presenting With Mild Neurologic Deficits
    Ovid Technologies (Wolters Kluwer Health) ; 2016
    In:  Stroke Vol. 47, No. suppl_1 ( 2016-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 47, No. suppl_1 ( 2016-02)
    Abstract: Introduction: Predicting outcomes of acute stroke patients initially presenting with mild neurologic deficits is important in making decision for thrombolytic therapy. Previous researches with a small sample size have failed to find specific items of NIH Stroke Scale or clinical syndromes to be predictive of functional outcome. Hypothesis: We hypothesized that certain items of the NIH Stroke Scale or their combinations would be independently associated with unfavorable functional outcome after mild stroke Methods: Using a multicenter stroke registry database, we identified patients with acute ischemic stroke who presented within 4.5 hours of symptom onset and had initial NIH Stroke Scale scores ≤ 5. Functional outcomes at three months after the stroke were classified as favorable (modified Rankin Scale score [mRS] 0 to 1) or unfavorable (mRS 2-6). The individual NIH Stroke Scale items were dichotomized as absent (0) or present (≥1) for the analysis. The NIH Stroke Scale items and the total score were tested for predicting the outcomes in multivariable models adjusting for demographics and clinical characteristics. Area under the ROC curve (AUC) was used to assess the performance of multivariable models. Results: Among 2,209 patients who met the eligible criteria, 588 patients (26.6%) exhibited unfavorable functional outcome (mRS 2-6) at three months. The most frequently present items were item 10 (dysarthria, 37.5%), item 4 (facial palsy, 21.1%), item 8 (sensory, 15.0%), and items indicating limb paralysis. Among 15 items of NIH Stroke Scale, all items except for item 8 (sensory) and item 11 (extinction) were significantly associated with unfavorable functional outcomes in bivariate analysis (P 〈 0.05), and many of them remained significant in multivariable analyses. In multivariable analyses, the model including the total NIH Stroke Scale scores exhibited similar AUC (0.759; 95% CI, 0.740 -0.776; P=0.75 for pairwise comparison) compared to the model with all NIH Stroke Scale items (0.758; 0.739 - 0.775) in predicting functional outcomes after the stroke. Conclusions: Simply using the total score was as effective as using all NIH Stroke Scale items in predicting outcomes of patients presented with mild stroke symptom.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.47.suppl_1.wp76
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2016
    detail.hit.zdb_id: 1467823-8
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