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Background: According to the literature, about one third of patients with brain ischemic symptoms lasting <24 hours, which are classified as TIAs according to the traditional "time-based" definition, show the presence of acute ischemic lesions at neuroimaging. Recent evidence has shown that the presence of acute ischemic lesions at neuroimaging may impact on the outcome of patients with transient ischemic symptoms treated with dual antiplatelet treatment (DAPT). This uncertainty is even more compelling in recent years as short-term DAPT has become the standard treatment for any non-cardioembolic TIA or minor ischemic stroke., Methods: This is a pre-specified subgroup analysis from a prospective multicenter real-world study (READAPT). The analysis included patients with time-based TIA - i.e. those with ischemic symptoms lasting <24 hours - who started DAPT. In the whole population, we assessed the presence of acute brain ischemic lesions at neuroimaging and their association with the ABCD2 score. To assess the impact of acute brain ischemic lesions on 90-day prognosis, we performed a propensity score matching of patients with and without those lesions. We adopted a primary effectiveness outcome which was a composite of new stroke/TIA events and death due to vascular causes at 90 days., Results: We included 517 patients - 324 (62.7%) male - with a median (interquartile range - IQR) age of 74 (IQR 65-81) years; 144 patients (27.9%) had acute brain ischemic lesions at neuroimaging. The proportion of patients with brain ischemic lesions did not vary according to the ABCD2 score. At follow-up, 4 patients with brain ischemic lesions (2.8%) and 21 patients without lesions (5.6%) reported the primary effectiveness outcome, which was similar between the groups before (p=0.178) and after matching (p=0.518)., Conclusions: In our population, patients with transient ischemic symptoms and acute ischemic lesions at brain MRI had a risk of recurrent ischemic events similar to those without lesions. The risk of recurrent ischemic events was low in both groups.

Background: Short-term dual antiplatelet treatment (DAPT) is superior to single antiplatelet treatment (SAPT) for secondary prevention in non-cardioembolic minor ischemic stroke and high-risk TIA. As the real-world use of DAPT is broader than in trials, it is important to clarify its benefit/risk profile in a diverse population., Methods: Post-hoc analysis of prospectively collected data from the READAPT cohort and 3 prospective stroke registries including patients with mild-to-moderate (National Institute of Health Stroke Scale [NIHSS] score 0-10) ischemic stroke receiving early DAPT or SAPT. The primary effectiveness outcome was 90-day return to pre-stroke neurological functioning using modified Rankin Scale (mRS) score. Secondary effectiveness outcomes were 90-day mRS shift, new ischemic stroke/TIA, vascular and all-cause death, 24-h early neurological improvement or deterioration. The safety outcome was 90-day intracranial hemorrhage., Results: We matched 1008 patients treated with DAPT and 1008 treated with SAPT. Compared to SAPT, patients treated with DAPT showed higher likelihood of 90-day primary effectiveness outcome (87.5% versus 84.4%, risk difference 3.1% [95%CI 0.1%-6.1%];p=0.047, risk ratio 1.03 [95%CI 1.01-1.07];p=0.043) and higher rate of 24-h early neurological improvement (25.3% versus 15.4%, risk difference 9.9% [95%CI 6.4%-13.4%];p<0.001, risk ratio 1.65 [95%CI 1.37-1.97];p<0.001). No differences were observed for other study outcomes. Subgroup analysis confirmed benefit of DAPT over SAPT for primary effectiveness outcome in patients with moderate stroke, those treated with intravenous thrombolysis and who received antiplatelet loading dose., Conclusions: Our findings suggest that DAPT use might be safe and more effective than SAPT even in the real-world and in patients who do not strictly fulfill criteria of landmark large clinical trials.

Background: The optimal treatment for acute minor ischemic stroke is still undefined. and options include dual antiplatelet treatment (DAPT), intravenous thrombolysis (IVT), or their combination. We aimed to investigate benefits and risks of combining IVT and DAPT versus DAPT alone in patients with MIS., Methods and Results: This is a prespecified propensity score-matched analysis from a prospective multicentric real-world study (READAPT [Real-Life Study on Short-Term Dual Antiplatelet Treatment in Patients With Ischemic Stroke or Transient Ischemic Attack]). We included patients with MIS (National Institutes of Health Stroke Scale score at admission ≤5), without prestroke disability (modified Rankin scale [mRS] score ≤2). The primary outcomes were 90-day mRS score of 0 to 2 and ordinal mRS distribution. The secondary outcomes included 90-day risk of stroke and other vascular events and 24-hour early neurological improvement or deterioration (≥2-point National Institutes of Health Stroke Scale score decrease or increase from the baseline, respectively). From 1373 patients with MIS, 240 patients treated with IVT plus DAPT were matched with 427 patients treated with DAPT alone. At 90 days, IVT plus DAPT versus DAPT alone showed similar frequency of mRS 0 to 2 (risk difference, 2.3% [95% CI -2.0% to 6.7%]; P =0.295; risk ratio, 1.03 [95% CI 0.98-1.08]; P =0.312) but more favorable ordinal mRS scores distribution (odds ratio, 0.57 [95% CI 0.41-0.79]; P <0.001). Compared with patients treated with DAPT alone, those combining IVT and DAPT had higher 24-hour early neurological improvement (risk difference, 20.9% [95% CI 13.1%-28.6%]; risk ratio, 1.59 [95% CI 1.34-1.89]; both P <0.001) and lower 90-day risk of stroke and other vascular events (hazard ratio, 0.27 [95% CI 0.08-0.90]; P =0.034). There were no differences in safety outcomes., Conclusions: According to findings from this observational study, patients with MIS may benefit in terms of better functional outcome and lower risk of recurrent events from combining IVT and DAPT versus DAPT alone without safety concerns., Registration: URL: https://www.clinicaltrials.gov; Unique identifier: NCT05476081.

Antiphospholipid syndrome (APS) is an autoimmune prothrombotic condition characterized by venous thromboembolism, arterial thrombosis, and pregnancy morbidity. Among neurological manifestations, arterial thrombosis is only one of the possible associated clinical and neuroradiological features. The aim of this review is to address from a neurovascular point of view the multifaceted range of the arterial side of APS. A modern neurovascular approach was proposed, dividing the CNS involvement on the basis of the size of affected arteries, from large to small arteries, and corresponding clinical and neuroradiological issues. Both large-vessel and small-vessel involvement in APS were detailed, highlighting the limitations of the available literature in the attempt to derive some pathomechanisms. APS is a complex disease, and its neurological involvement appears multifaceted and not yet fully characterized, within and outside the diagnostic criteria. The involvement of intracranial large and small vessels appears poorly characterized, and the overlapping with the previously proposed inflammatory manifestations is consistent.