International Journal of Stroke最新文献

Background: Sodium-glucose cotransporter 2 inhibitors (SGLT2i) improve the cardiovascular outcomes of patients with type 2 diabetes (T2D). However, whether this effect extends to stroke prevention in high-risk patients remains unclear.

Aims: This study aims to investigate the effect of SGLT2i in stroke prevention in patients with T2D and concomitant risk factors.

Methods: Patients with T2D and various risk factors for stroke were identified from the TriNetX platform from 2013 to 2024. These patients were divided into two cohorts: one treated with SGLT2i, and the other with metformin or dipeptidyl peptidase-4 inhibitors. Propensity score matching was used to balance the patients' demographic characteristics, underlying comorbidities, and antiplatelet and anticoagulant drug use patterns. The primary outcome was the development of ischemic or hemorrhagic stroke or the onset of a transient ischemic attack (TIA) within 1 year. Unadjusted Cox proportional hazards models were applied to estimate hazard ratios (HRs). Sensitivity analyses stratified by age, sex, and hemoglobin A1c (HbA1c) levels were performed, and interaction tests were used to assess potential effect modifiers. In addition, the two cohorts were compared for estimation of numbers needed to treat (NNTs).

Results: A total of 3,715,058 patients were identified, of whom 971,727 (26.2%) were SGLT2i users. After matching, 932,419 patients were included in each group. SGLT2i use was associated with a significantly reduced risk of ischemic stroke (HR: 0.84, 95% confidence interval (CI): 0.81-0.87; NNT: 669), hemorrhagic stroke (HR: 0.73, 95% CI: 0.68-0.79; NNT: 1837), and TIA (HR: 0.81, 95% CI: 0.77-0.86; NNT: 1615). The protective effect against ischemic stroke was more pronounced in males and individuals aged over 65 years. Greater benefit was observed in patients with chronic kidney disease (NNT: 466), atrial fibrillation (NNT: 492), and heart failure (NNT: 415). In contrast, the protective effect was attenuated in patients with obesity, among whom SGLT2i use was associated with a modestly increased risk of ischemic stroke after 1 year (HR: 1.05, 95% CI: 1.01-1.09).

Conclusion: SGLT2i use is associated with a significant reduction in the risk of stroke among selected T2D patients. SGLT2i may be used as a first-line therapy for diabetes patients with concomitant chronic kidney disease, atrial fibrillation, and heart failure.

Background: Stroke globally impacts mortality and disability. Compliance with international standards and evidence-based practices for acute stroke management would improve patient outcomes.

Objectives: We aimed to present a descriptive analysis of the quality of acute stroke care across different countries using the Registry of Stroke Care Quality (RES-Q).

Method: In a cross-sectional study, data from key quality indicators such as Emergency Medical Services (EMS) deployment rates, hospital arrival to imaging time (door-to-imaging: DIT), hospital arrival to thrombolysis time (door-to-needle: DNT), and Stroke Unit Care/Intensive Care Unit (SU/ICU) admission frequencies were examined. The analysis employed descriptive statistics and Spearman correlation tests.

Results: Of 334,184 patients from 1130 hospitals in 70 countries, 218,832 patients (65.5%) from 47 countries were diagnosed with acute ischemic stroke after exclusions. The number of patients per country ranged from 226 to 62,080. International variability in care quality was observed: EMS (7-97%); SU/ICU (12-100%); and median DIT (7-41 min); and DNT (20-75 min). IVT rates varied markedly across countries, ranging from <1% to 52%. Higher patient volumes were positively correlated with SU/ICU admission and negatively with DIT and DNT (ρ = 0.10, -0.22, -0.42, respectively).

Conclusion: This study demonstrates substantial international variation in the use of quality monitoring in clinical practice as well as in key indicators of acute ischemic stroke care, including intravenous thrombolysis rates and treatment timelines. The extent of variability highlights opportunities for benchmarking and targeted quality improvement efforts across diverse healthcare systems.

Background: Stroke is a leading cause of death and disability worldwide, with women facing unique risks due to a combination of well-established, under-recognized, and female-specific factors.

Aims: This prospective cohort study aimed to quantify the population attributable fractions (PAFs) of stroke with distinct risk factor profiles and to explore disparities across age strata.

Methods: Data were from 239,200 women recruited in the UK Biobank. Following the framework established by the Lancet Women and Cardiovascular Disease Commission, stroke risk factors were sorted into three categories, including eight well-established risk factors, four social-psychological risk factors, and 11 reproductive factors. The Cox regression model with correction of multiple comparisons was used to assess their associations with incident stroke and its subtypes. PAFs were calculated to estimate the attributable stroke burden for individual risk factors, each risk factor category, and all risk factors combined. Age-stratified analyses were further conducted.

Results: During a median follow-up of 13.8 years, 4580 (1.9%) women developed incident stroke. Hypertension served as the leading individual risk factor (PAF 23.3%, 95% confidence interval [CI] = 20.1%, 26.4%). Under the assumption of multiplicative effect, well-established risk factors accounted for 32.8% of stroke cases, followed by social-psychological factors (15.2%) and reproductive factors (6.3%). The overall PAF (95% CI) of total stroke with all risk factors combined was 47.6% (47.6%, 47.7%) or 40.2% (40.1%, 40.2%) with multiplicative or additive effect. Across the age groups, the highest total stroke PAFs for overall risk factors (51.9%) and well-established risk factors (37.0%) were observed among women aged 60-65 years. For reproductive factors, the highest PAFs were observed among women aged 60-65 years (9.2%) and ⩾65 years (4.5%).

Conclusion: While the conventional risk factors contributed to the greatest stroke burden, the potential benefit of addressing issues related to unfavorable social-psychological conditions and adverse reproductive profiles should not be neglected. Integrated and targeted prevention strategies are in urgent need to protect women's cardio-cerebrovascular health throughout the lifespan.

Background: Intracerebral hemorrhage (ICH) survivors are at increased risk of major adverse cardiovascular and cerebrovascular events (MACE) compared with population controls; however, little is known about the annual rates and risk factors for MACE.

Methods: We searched Medline, Embase, and trial registries systematically in April 2024 for studies of adults with ICH, reporting either a MACE composite outcome or both ischemic and hemorrhagic outcomes, with at least one year of follow-up. We excluded studies limited to secondary ICH or isolated non-ICH intracranial hemorrhages. We used the QUIPS tool to assess studies' risk of bias. The primary outcome was the rate of MACE. We used a random-effects meta-analysis to estimate the annual event rate (per 100 person-years, expressed as %) for each outcome. We conducted subgroup analyses and meta-regression to explore heterogeneity.

Results: We included 26 studies, involving 198,289 ICH survivors. Individual studies' reported annual rate of MACE ranged 4.2-14.6%. The pooled annual rate of recurrent ICH was 2.1% (95% confidence interval (CI) = 1.7-2.6; 26 studies; I² = 94%) and of ischemic stroke was 2.0% (95% CI = 1.5-2.7; 24 studies; I² = 95%). Meta-regression analyses identified one statistically significant association between a higher prevalence of atrial fibrillation and an increased risk of ischemic stroke.

Discussion: The rates of recurrent ICH and ischemic stroke were comparable among ICH survivors, but evidence about other MACE outcomes remains limited. An individual participant data meta-analysis is needed to investigate the predictors of MACE outcomes, which may help inform risk stratification and prognosis among ICH survivors.

Background: Nearly half of the patients who received endovascular thrombectomy (EVT) for large vessel occlusion experience poor functional outcomes. Reliable tools for early post-procedural prognostication are needed. We aimed to assess and compare the performance of existing, pragmatic post-EVT prognostic scores in a large national multicenter cohort.

Methods: We conducted a systematic literature search to identify pragmatic post-thrombectomy prognostic scores predicting 90-day functional outcomes. Models relying on advanced imaging, small derivation samples, or machine learning were excluded. We analyzed data from the IRETAS registry-a prospective, multicenter Italian cohort of stroke patients treated with EVT. Inclusion criteria were pre-stroke modified Rankin Scale (mRS) ⩽ 2 and available 90-day mRS. The primary outcome was good functional outcome (mRS ⩽ 2). Prognostic performance was assessed using c-statistics in the samples where each individual score was measurable. Scores were compared using DeLong tests in the subset of patients for whom all scores were measurable.

Results: Three scores were identified: HERMES-24, BET, and SNARL. Among 22,768 patients in the registry, 18,408 (89.1%) had a measurable HERMES-24 score, 13,593 (59.7%) had a measurable BET score, and 19,007 (83.5%) had a measurable SNARL score. Median age was 75 years (IQR 65-82), and 11,528 (50.6%) were female. In the subset in which each test was measurable, HERMES-24 showed the best performance for predicting mRS ⩽ 2 (c-statistic = 0.889), followed by BET (c-statistic = 0.794) and SNARL (c-statistic = 0.762) (p < 0.001). In the subset of 12,233 patients for whom all three prognostic scores were calculable, a head-to-head comparison confirmed the superior performance of the HERMES-24 model: HERMES-24 score versus BET score (c-statistic difference = 0.098 [95% CI = 0.092-0.105]; p < 0.001) and HERMES-24 score versus SNARL score (c-statistic difference = 0.124 [95% CI = 0.116-0.132]; p < 0.001).

Conclusions: In this large, multicenter, national cohort, the post-EVT HERMES-24 score-which accounts only for age and 24-h NIHSS-demonstrated the highest prognostic performance among existing, pragmatic post-EVT scores. Its simplicity and robust performance support its routine adoption in clinical practice.

Background: Lacunes of presumed vascular origin are a key imaging marker of cerebral small-vessel disease (cSVD), predicting stroke and dementia risk. Their incidence and determinants have not been systematically quantified across different populations, and implications for clinical research remain unclear.

Aims: This study aims to estimate the annualized incidence of new lacunes across diverse populations, identify study-level factors contributing to heterogeneity, summarize patient-level risk factors for incident lacunes, and provide empirical data to inform sample size estimation for studies using incident lacunes as an imaging outcome.

Summary of review: Thirty-one studies comprising 12,646 participants and 56,073 person-years were included. The pooled overall incidence was 3.27 per 100 person-years (95% CI, 2.12-4.42), ranging from 1.50 to 8.03 across populations. Rates were highest in cSVD patients (8.03; 95% CI, 3.8-12.27), intermediate in stroke and memory-clinic patients, and lower in community-based, hypertensive, and non-specific artery disease cohorts. Meta-regression showed that baseline lacune prevalence was positively associated with incidence (β = 0.057; 95% CI, 0.006-0.108; P = 0.031). At the individual level, male sex, baseline lacunes, hypertension, and diabetes were associated with higher risk. In cSVD populations, detecting a 30% relative risk reduction required 563, 867, and 1782 participants per arm for 3-, 2-, and 1-year follow-up, respectively.

Conclusion: Incident lacune rates vary substantially across populations and are strongly influenced by baseline lacune burden and vascular risk factors. These findings provide context for population selection and sample size considerations in studies using incident lacunes as an imaging outcome.

Background: Sex disparities in stroke outcomes are well-recognized, but it remains unclear whether these disparities vary across stroke subtypes and how they relate to differences in acute care delivery.

Aim: The aim of the study was to examine sex differences in long-term mortality, functional outcomes, and acute stroke management across stroke subtypes using a nationwide population-based cohort.

Methods: This retrospective cohort study analyzed linked clinical audit and claims data from 58,429 patients with acute stroke admitted to 269 hospitals in South Korea between 2018 and 2021. Clinical data were derived from the national Acute Stroke Quality Assessment Program and linked to claims. The primary outcome was all-cause mortality. The secondary outcome was poor functional outcome at discharge. Multivariable Cox and logistic regression models were used to assess associations between sex and outcomes, stratified by stroke subtype and adjusted for age, stroke severity, and comorbidities. Differences in acute stroke care were also analyzed.

Results: Of 58,429 patients (mean [SD] age, 68.6 [13.8] years; 43.9% female), 76.1% had ischemic stroke (IS), 15.7% intracerebral hemorrhage (ICH), and 8.2% subarachnoid hemorrhage (SAH). Females were older than males across all subtypes and had different comorbidity profiles. After adjustment, females had significantly lower mortality in all subtypes (adjusted hazard ratios [95% CI]: IS, 0.77 [0.74-0.80]; ICH, 0.60 [0.56-0.64]; SAH, 0.60 [0.54-0.67]; all P < 0.001). Functional outcomes varied: females had worse outcomes in IS, better in ICH, and no difference in SAH. Males were more likely to receive reperfusion and surgical therapies; females were more likely to receive rehabilitation services. These care differences did not fully explain the observed disparities in outcomes.

Conclusion: In this national cohort, sex disparities in stroke outcomes differed by subtype. Despite lower adjusted mortality in females, functional outcomes were not uniformly better. These findings underscore the importance of adopting sex- and subtype-specific approaches to stroke care, secondary prevention, and rehabilitation.

Background: Although endovascular therapy (EVT) improves functional outcomes in acute ischemic stroke patients, some with large hemispheric infarction (LHI) post-EVT may still require decompressive hemicraniectomy (DHC). This study aimed to explore whether DHC benefits all patients with post-EVT LHI and to identify which patients are more likely to benefit from DHC.

Methods: This pooled analysis of the RESCUE-RE study and the ANGEL-ASPECT trial enrolled patients with LHI and severe neurological deficits after EVT. According to the treatment received, patients were categorized into DHC and conservative therapy groups. The primary outcome was 90-day mortality. Propensity score matching (PSM) analysis was used to control for differences between groups.

Results: In total, 136 of 2036 EVT-treated patients (6.7%) in the RESCUE-RE study and 59 of 230 (25.6%) in the ANGEL-ASPECT trial met inclusion criteria. Among the 195 patients included, 50 (25.6%) underwent DHC (41 after PSM), while 145 (74.4%) received conservative therapy (41 after PSM). Patients undergoing DHC after EVT had significantly lower 90-day mortality rates compared with those receiving conservative therapy (odds ratio (OR) = 0.26; 95% confidence interval (CI), 0.10-0.66; p = 0.005), but no significant improvement was observed in 90-day modified Rankin Scale (mRS) distribution (common OR = 0.47; 95% CI = 0.21-1.05; p = 0.06). Patients within an overlapping range of post-EVT midline shift (approximately 10-17 mm) or infarct volume (approximately 250-330 mL), where both 90-day mortality and ordinal mRS distribution models favored DHC, appeared more likely to derive a comprehensive clinical benefit. Baseline infarct-core volume was not associated with the treatment effect of DHC.

Conclusion: In patients with LHI after EVT, DHC was associated with reduced mortality when performed in accordance with current guidelines. Moreover, patients within a higher, but not the most extreme, range of injury severity after EVT might be more likely to benefit from DHC.

Intracranial atherosclerotic stenosis (ICAS) is an important cause of ischemic stroke and transient ischemic attack (TIA), which is also associated with increased risks of cognitive impairment and dementia. The prevalence of both asymptomatic and symptomatic ICAS (asICAS and sICAS) is significantly higher in Asian populations than in Western populations. In recent years, substantial new evidence has emerged regarding the epidemiology, diagnosis, assessment, prognosis, and treatment of asICAS and sICAS. The China ICAS Research Group has developed this guideline based on published research and relevant domestic and international guidelines or expert consensus, to further clarify the definition, epidemiology, and prognosis of ICAS and the profiles of high-risk ICAS patients and provide evidence-based recommendations on screening, diagnosis, assessment, and treatment strategies of asICAS and sICAS. For imaging exams, noninvasive and contrast-independent modalities are generally suitable for screening and assessment of ICAS in stroke-free individuals with multiple risk factors as well as for routine exams of stroke patients, while contrast-dependent or invasive imaging methods may be employed for further assessment or guiding treatment decision-making in sICAS patients. In addition, vessel wall imaging is valuable for distinguishing the etiology of intracranial stenosis, particularly in young stroke patients. Multiple imaging modalities or methods are available for the assessment of cerebral perfusion, hemodynamics, and collateral circulation that may meet different needs. Regarding interventions, lifestyle modifications (healthy diet, safe exercise, smoking cessation) are recommended for both asICAS and sICAS patients. For stroke-free individuals with asICAS, controlling vascular risk factor is the primary strategy, while routine aspirin or endovascular treatment for primary stroke prevention is not recommended. For sICAS patients, the cornerstone is intensive medical management, including short-term dual antiplatelet therapy in high-risk patients (such as those with severe luminal stenosis, minor stroke, or high-risk TIA) followed by lifelong monotherapy, aggressive lipid control (targeting low-density lipoprotein cholesterol < 1.8 mmol/L), blood pressure control (<140/90 mmHg), and glycemic control (targeting HbA1c < 7.0%), with structured follow-up to enhance treatment adherence. Endovascular treatment is not recommended for sICAS with mild to moderate luminal stenosis (<70%) but may be considered for carefully selected patients with severe (70-99%), medically refractory sICAS, particularly those with hypoperfusion, with a preference to delay the intervention for more than 21 days after stroke to enhance safety.

Background: Epidemiological evidence suggests associations between substance use disorders and risk of stroke, but whether these are due to confounding or are true causal relationships remains uncertain.

Aims: To meta-analyze the observational evidence on illicit substance use and stroke risk and apply Mendelian randomization (MR) to evaluate potential causal effects of substance dependence on stroke subtypes.

Methods: We conducted a systematic review and meta-analysis of studies reporting associations between illicit drug use and stroke (PROSPERO registration-CRD420251053702). The meta-analysis included 32 studies comprising more than 100 million total participants across administrative, hospital-based, and population-based datasets. Pooled odds ratios (ORs) were estimated using multivariate random-effects models for ischemic and hemorrhagic subtypes. We then performed two-sample MR using genome-wide association study summary statistics to examine associations between seven drug exposures and all stroke, ischemic and hemorrhagic stroke, and ischemic stroke subtypes.

Results: Meta-analysis demonstrated significant associations of cannabis (OR = 1.37, 95% confidence interval (95% CI) = 1.14-1.65), cocaine (OR = 1.96; 95% CI = 1.27-3.01), and amphetamines (OR = 2.22, 95% CI = 1.40-3.53) with increased stroke risk, while no significant association was observed for opioids. Findings for cannabis showed some heterogeneity and small-study effects. MR analyses revealed that cannabis use disorder was associated with any stroke (OR = 1.11 [1.01-1.51]) and large artery stroke (OR = 1.35, 95% CI = 1.01-1.80), and cocaine dependence was associated with cardioembolic stroke (OR = 1.08, 95% CI = 1.02-1.14) and intracerebral hemorrhage (OR = 1.38, 95% CI = 1.15-1.65). Genetically predicted substance use disorder overall was associated with any stroke (OR = 1.33, 95% CI = 1.02-1.72) and intracerebral hemorrhage (OR = 7.79, 95% CI = 3.46-17.54). Problematic and dependent alcohol use was linked to large artery and cardioembolic stroke, whereas nicotine dependence showed no significant associations.

Conclusion: Our findings provide consistent observational and genetic evidence that several forms of substance misuse increase stroke risk, particularly cocaine, amphetamines, and cannabis. These findings suggest important public health implications for prevention strategies targeting substance use disorders to mitigate stroke risk.