Acute Ischemic Stroke (AIS)

The primary objective of this study is to collect real-world performance and safety data on the Penumbra System in a patient population with acute ischemic stroke (AIS)

Acute Ischemic Stroke is a leading cause of mortality and long-term disability worldwide. Increasing evidence suggests that systemic inflammation plays a significant role in the pathophysiology and progression of ischemic brain injury. Recently, several inflammatory biomarkers derived from routine laboratory tests have been investigated as potential predictors of stroke severity and clinical outcome. This prospective cohort study aims to evaluate the predictive utility of the monocyte-to-albumin ratio, neutrophil-to-albumin ratio, and total leukocytic count-to-albumin ratio in patients with acute ischemic stroke. These indices combine inflammatory cell counts with serum albumin levels and may reflect both systemic inflammatory status and nutritional condition. Stroke severity will be assessed at admission using the NIH Stroke Scale, while functional outcome will be evaluated during follow-up using the Modified Rankin Scale. The study aims to determine whether these simple and readily available biomarkers can serve as reliable predictors of stroke severity and prognosis in patients with acute ischemic stroke.

This study is a prospective, multicenter, double-blind, randomized, placebo-controlled clinical trial designed to evaluate whether early administration of PCSK9 inhibitors can effectively improve functional outcomes at 90 days in patients with ischemic stroke (AIS) associated with intracranial atherosclerotic stenosis (ICAS), primarily assessed using the modified Rankin Scale at 90 days.

Stroke, especially acute ischemic stroke (AIS) caused by a blocked blood vessel in the brain, is a leading cause of death and long-term disability. When the blockage is in a large blood vessel, a procedure called endovascular therapy (EVT)-where the clot is removed using a catheter-is highly effective. However, the sooner EVT is done, the better the outcome for the patient. Research has shown that delays between arriving at the hospital and starting EVT (called door-to-groin time) significantly reduce the chances of recovery. For example, reducing this time by just 15 minutes can mean 20 more patients (out of 1,000 treated) going home instead of to a care facility. Even a 10-minute improvement can result in over 100 extra days of independent living for patients and save more than $10,000 in healthcare costs per patient. To reduce these delays, hospitals have improved stroke workflows. In the current standard approach, patients suspected of having a stroke are taken first to a CT scan room to confirm the diagnosis, and then, if a treatable occlusion is found, to a separate room for EVT. This usually takes around 60-70 minutes. However, moving patients between rooms takes time. A new approach called "One-Stop management" could solve this. In this method, both the brain scan and the EVT procedure are done in one room-the angiography suite-using special imaging tools called flat panel CT (FDCT) and FDCT angiography (FDCT-A). A previous study with 230 patients showed that One-Stop management is possible and saves time. But there's a challenge: the decision to follow the One-Stop pathway is made before a clear diagnosis is available. That's important because not all strokes benefit from EVT. Severe stroke symptoms (measured by a score called NIHSS ≥10) can come from: * A large or medium vessel blockage (which EVT can treat), * A small vessel blockage, or * A bleed in the brain (hemorrhage). Only the first group benefits from EVT. About 85% of patients with severe symptoms fall into this category. The rest-about 15%-would not benefit, and there are concerns that FDCT might be slightly less accurate than regular CT in diagnosing these types of strokes. So, we need to test whether One-Stop management is safe and effective for all patients, not just those with treatable blockages. To do this, the GET-FAST trial will compare the One-Stop approach to the standard two-room process. Patients will be randomly assigned to one of the two strategies. Importantly, this randomization won't affect their actual treatment-everyone will still receive the best care according to current medical guidelines. The main endpoint for the evaluation of the One-Stop approach will be long-term (at 90 days) disability and dependency in daily life as measured with the modified Rankin Scale (mRS). This study will include all patients as they were assigned, regardless of what type of stroke they actually had. This is called an "intention-to-treat" analysis, and it provides the most reliable measure of the overall impact of One-Stop management. Another key aspect of the trial is that any CE-certified imaging system already used in hospitals can be used for the One-Stop process-no specific brand or model is required. This makes the results more applicable to real-world hospital settings. If GET-FAST proves that One-Stop management leads to better patient outcomes, this could transform how stroke care is delivered. More patients could return to independent living, and fewer would require long-term care -leading to major reductions in healthcare costs. For example, even a one-point improvement on a common stroke disability scale (mRS) can triple the savings in lifetime care costs.

The study aims to investigate characteristics and prognosis of ischemic stroke cases following cardiological interventions, focusing on the effectiveness and safety of acute ischemic stroke treatments.

Since 2015, many randomized trials have shown that endovascular thrombectomy improve functional outcomes in acute ischemic stroke patients with large vessel occlusion. Recently, five randomized controlled trials (ANGEL-ASPECT \[Endovascular Therapy in Acute Anterior Circulation Large Vessel Occlusive Patients with a Large Infarct Core\], LASTE \[LArge Stroke Therapy Evaluation\], RESCUE-Japan LIMIT \[The Recovery by Endovascular Salvage for Cerebral Ultra-Acute Embolism-Japan Large Ischemic Core Trial\], SELECT 2 \[Randomized Controlled Trial to Optimize Patient's Selection for Endovascular Treatment in Acute Ischemic Stroke\], and TENSION \[The Efficacy and Safety of Thrombectomy in Stroke with extended lesion and extended time window\]) demonstrated the efficacy and safety of thrombectomy for large infarct patients (defined as Alberta Stroke Program Early Computed Tomography Score \[ASPECTS\] ≥3 or infarct core \<100ml). Patients with extra-large infarct core (ASPECTS score of 2 or less) were excluded from these trials. Therefore, the efficacy of endovascular thrombectomy in patients with extra-large ischemic burden has not been well studied. The XL STROKE registry is aiming to investigate the clinical outcomes and safety of mechanical thrombectomy in acute extra-large ischemic stroke.

Acute ischemic stroke (AIS) is a severe and life-threatening condition, with 35% of AIS patients experiencing impaired consciousness upon admission within 24 hours of onset. Previous studies indicated that patients with impaired consciousness at the onset of stroke have a higher incidence of stroke-related complications, particularly cerebral edema and pneumonia, as well as higher in-hospital and three-month mortality rates. The etiology of impaired consciousness in AIS is complex: ischemic damage to reticular activating system of the brainstem can directly lead to cell necrosis and result in impaired consciousness. Furthermore, secondary pathological changes following AIS, such as excitatory amino acid toxicity, oxidative stress, free radical production, and cascading inflammatory responses, can indirectly worsen impaired consciousness. Therefore, impaired consciousness at the onset of AIS is the result of cellular damage under multiple pathophysiological mechanisms. Developing neuroprotective drugs with multiple targets is key to effectively improving adverse outcomes related to impaired consciousness in AIS. However, there is currently a lack of treatment specifically aimed at improving impaired consciousness at the onset of AIS. Cultivated Bovine Bezoar (Bovis Calculus Stativus, BCS) combines the advantages of pharmacological similarity to natural bovine by adding components such as deoxycholic acid, cholic acid, and composite calcium bilirubin to fresh bovine bile. It is rich in various trace elements and amino acids and is a compound medication that can exert neuroprotective effects through multiple pathways and targets. In traditional Chinese medicine, it has long been used to treat various consciousness disorder-related diseases, including stroke. The various components of in vitro cultivated bezoar are also widely used in clinical research for various neurological diseases.The above evidence fully demonstrates that BCS is an optimal treatment for impaired consciousness in stroke. The goal of this clinical trial is to learn if Bovis Calculus Stativus works to treat acute cerebral ischemic stroke with impaired consciousness. It will also learn about the safety of Bovis Calculus Stativus. The main questions it aims to answer are: 1. Does Bovis Calculus Stativus treat and alleviate consciousness disorders in patients with acute cerebral infarction accompanied by impaired consciousness ？ 2. What medical problems do participants have when taking Bovis Calculus Stativus? Researchers will compare Bovis Calculus Stativus to a placebo (a look-alike substance that contains no drug) to see if Bovis Calculus Stativus works to treat acute cerebral ischemic stroke with impaired consciousness. Participants will: 1. receive treatment with Bovis Calculus Stativus (or placebo) for 5 days. 2. Take an in-person or telephone follow-up within 90 days after the acute stroke.

This is a Phase IIa clinical trial with a three-arm design that utilizes randomization, double-blinding, and placebo control. The primary objective of this study is to evaluate the efficacy of single and multiple intravenous infusions of hUC-MSCs injection in patients with AIS. The secondary objective is to assess the safety and tolerability of single and multiple intravenous infusions of hUC-MSCs injection in patients with AIS. The exploratory objective is to investigate the pharmacokinetic and pharmacodynamic characteristics of hUC-MSCs injection in patients with AIS.

The purpose of this clinical trial is to study the two main types of approaches used in stroke thrombectomy and to investigate if one approach is more effective than the other, as this is currently not known. This study will be conducted in adults who have been diagnosed with an acute ischemic stroke and who are undergoing a thrombectomy for the treatment of their stroke. The main questions it aims to answer are: * Does the use of a balloon guide catheter versus a conventional guide catheter lower the time needed to restore blood flow in the blocked vessel in the brain * To help researchers better understand the technical, clinical, and procedural outcomes associated with using a balloon guide catheter versus a conventional guide catheter in stroke thrombectomy Participants will be asked to * Share their medical history and imaging data that is collected as part of their routine medical care * Undergo a mechanical thrombectomy as part of their routine medical care * Answer some questions about their neurological functioning at 3 months (90 days) post hospitalization

Although mechanical thrombectomy or thrombolytic therapy for large vessels can achieve a revascularization rate (TICI ≥2b) of over 90%, 30-50% of patients still exhibit poor functional outcomes. This phenomenon of "ineffective reperfusion" suggests that microcirculatory dysfunction plays a decisive role in post-stroke neural injury. Therefore, it is necessary to combine brain protection strategies with microcirculatory reperfusion therapy to improve the functional prognosis of stroke patients.Increasing cerebral blood flow (CBF) and neurovascular unit (NVU)-based cerebral protection are current hotspots in the emergency treatment of stroke. Galantamine, extracted from Lycoris aurea (a traditional Chinese medicinal herb), is an acetylcholinesterase inhibitor (AChEI) that has been widely recognized for improving cerebral blood flow and modulating inflammatory responses in ischemic stroke (IS). Therefore, the applicant will conduct an internationally compliant, randomized controlled clinical study with routine treatment to evaluate the efficacy of galantamine in the treatment of acute cerebral infarction. This project will conduct a comprehensive assessment of the drug's efficacy from multiple aspects, including improvements in stroke-related outcomes, Traditional Chinese Medicine (TCM) syndrome manifestations, cognitive function, cerebral blood flow, and inflammatory factors.

This domain has a prospective, randomized, controlled, open-label, parallel group with blinded endpoint assessment (PROBE) design. Up to 4,000 patients with presumed acute ischemic stroke (AIS) will be followed for 90 days (or until death, if prior to 90 days). The end of the trial is defined as the date that all participants have completed their Day 90 assessment. This domain aim is to efficiently, reliably, and simultaneously, determine the comparative effectiveness of intravenous thrombolysis (IVT) using standard-dose intravenous tenecteplase (0.25 mg/kg body weight), vs. low-dose intravenous tenecteplase (0.18 mg/kg body weight) in all patients who present to hospital with acute ischemic stroke and are considered for intravenous thrombolysis. In addition, this domain also seeks to study standard-dose intravenous tenecteplase (0.25 mg/kg body weight), vs. low-dose intravenous tenecteplase (0.18 mg/kg body weight) vs. no TNK upfront with rescue IA TNK if necessary (in those eligible for emergency EVT) and no TNK upfront in those who have taken DOACs during the preceding 48 hours. This domain therefore seeks to generate more robust randomized evidence to guide clinicians in their decisions over the balance of risks and treatment with intravenous thrombolysis with tenecteplase wherever such evidence is currently insufficient. This domain will currently evaluate four research questions in relation to the use of IVT with tenecteplase: 1. In patients with recent (48 hours) intake of a standard-dose direct oral anticoagulant (DOAC), how should IVT be used? - Use standard-dose (0.25 mg/kg body weight) or low-dose tenecteplase (0.18 mg/kg) or not at all. 2. In patients planned to be treated with endovascular thrombectomy, how should tenecteplase be used? -Treat with IV tenecteplase (standard- or low-dose) or not at all. 3. In any patient receiving IVT, what is the optimal dose of tenecteplase? - use standard-dose (0.25 mg/kg body weight) or low-dose tenecteplase (0.18 mg/kg). 4. To what extent is the treatment effect of standard- vs. low-dose tenecteplase modified by key patient characteristics, such as diabetes, prior antiplatelet therapy, renal failure, or frailty, old age or having a heavy burden of cerebral small vessel disease on brain imaging.

Prospective, multi-center, single-arm early feasibility study enrolling a minimum of 15 subjects at up to a minimum of 3 active investigational sites in the United States. The subjects must be diagnosed with acute ischemic stroke (AIS), must be post-mechanical thrombectomy, will have had intravenous thrombolytics, and have a visible MCA, ACA or PCA occlusive clot on initial angiographic imaging. Each subject will receive the Pulse NanoMED procedure after attempted neurovascular therapy to achieve better reperfusion.

This is a multicenter open-label, single-arm, dose escalation phase I clinical trial to evaluate the safety and tolerability of SNE-101 in patients with acute ischemic stroke

Minor stroke is considered an acute ischemic stroke (AIS) that has a National Institute of Health Stroke Scale (NIHSS) score ≤ 5 points. About 1/3 patients with mild stroke have poor prognosis, whether patients with this type undergo thrombolysis has been a controversial issue. A pooled analysis published in the Lancet in 2014 included 9 high-quality RCT studies of intravenous thrombolysis such as NINDS and IST3, and a total of 666 (10%) patients with mild stroke were included in the analysis. For mild stroke, the proportion of good prognosis in the control group and the alteplase group was 58.9% and 68.7% (OR 1.48, 95%Cl 1.07-2.06), respectively. Therefore, guidelines recommended alteplase thrombolytic therapy for patients with mild stroke. However, PRISMS, a randomized controlled trial of intravenous thrombolytic therapy for mild stroke published in 2018, found that alteplase intravenous thrombolytic therapy did not improve clinical outcomes compared with aspirin in patients with mild non-disabled stroke (90-day mRS 0-1 ratio 78.2% vs 81.5%), and the incidence of symptomatic intracranial hemorrhage was higher. However, a major limitation of the PRISMS study was that more than 85% of patients had numbness and dysarticulation, so this conclusion cannot be extrapolated to patients with other mild stroke symptoms. Moreover, due to the early termination of the sponsorship of this trial, the number of enrolled cases did not reach the pre-designed number, resulting in a serious decline in the authenticity of the study results. Symptoms and outcomes of minor stroke are important criteria for assessment. However, there is currently no uniform standard for the assessment of disability. Both international and domestic guidelines recommend IVT with alteplase for minor disabling stroke within 4.5h, but not routinely recommend intravenous thrombolysis for minor nondisabling stroke within 4.5h. It is important to underline that strokes with low NIHSS scores are not necessarily nondisabling. Despite, patients with mild stroke symptoms are often excluded from IVT due to safety concerns potentially outweighing the putative benefits of recanalization therapy. Therefore, the investigators developed a new definition to refine the disability assessment of stroke symptoms. The purpose of this study was to investigate whether AIS patients with NIHSS ≤ 5, a limb-related NIHSS item score of 0, and with any of the following NIHSS item ≥2: Best Gaze, Visual, Facial palsy, Limb ataxia, Sensory, Best language, Dysarthria, Extinction and Inattention, could benefit from intravenous thrombolysis.

Acute ischemic stroke is caused by reduced blood supply to the brain associated with neuroinflammation. This mechanism contributes to acute neuronal death and persists even after reopening of the closed vessel, with consequent limitation of clinical and functional improvement. Experimental and clinical evidence demonstrated the anti-inflammatory and neuroprotective effect of micronized and ultramicronized Palmitoylethanolamide (PEA). The aim of this study is to evaluate the effect of co-ultramicronized PEA and luteolin (700 mg + 70 mg in 10 ml) on the clinical outcomes of patients with acute ischemic stroke undergoing mechanical thrombectomy.

This is a Phase I clinical to evaluate the safety and tolerability of single and multiple intravenous infusions of AAPB at different doses over 7 consecutive days.