Active clinical trials for "Cerebral Infarction"

Rationale Acute ischemic stroke due to atrial fibrillation (AF) carries a high risk for early recurrence. In acute stage, guidelines recommend aspirin, but do not recommend anticoagulation due to the increased risk of intracranial bleeding. Since, aspirin has a limited efficacy of preventing recurrent stroke in AF, expert consensus suggests early anticoagulation in non-severe stroke with AF. The current practice for acute ischemic stroke patients with AF is delayed warfarin administration with aspirin use for non-minor stroke or immediate warfarin administration (sometimes with heparin bridging) for minor stroke. However, conventional anticoagulation with warfarin in acute ischemic stroke with AF has the following limitations: 1) risk of intracranial bleeding particularly in acute stage, 2) delayed action and transient paradoxical thrombogenic tendency due to the inhibition of protein C, resulting in the risk of early recurrent embolic stroke, and 3) prolongation of hospitalization waiting for full anticoagulation. In contrast, as compared to warfarin, rivaroxaban is advantageous for reduced risk of intracranial bleeding and immediate anticoagulation efficacy. Goal The current trial will examine whether early initiation (within 5 days from stroke onset) of rivaroxaban as compared to conventional warfarin would reduce intracranial bleeding, recurrent embolic stroke, and hospital stay in patients with acute ischemic stroke due to AF.

The objective of the study is to evaluate the safety and the potential therapeutic effects per dose of Cordstem-ST Intravenous Transplantation in Cerebral Infarction subjects comprised of 2 treatment cohorts: Cohort 1 : Cordstem-ST 2.0 x 10^8 cells or Placebo on day 0 Cohort 2: Cordstem-ST 2.0 x 10^8 cells or Placebo on day 0 and day 7

Rationale The only proven therapy for acute stroke is tPA within 4.5 hours of symptom onset. This is the standard of care for patients presenting to our hospital within that time frame. Thrombolysis outside the 4.5 hour window is considered only on experimental or compassionate grounds. Tenecteplase (TNK) is a genetically modified variant of tPA that has many theoretical advantages in acute stroke. Studies show that systemic plasminogen activation is higher after tPA administration, relative to TNK and this is associated with an increased risk of bleeding events. Imaging cerebral blood flow (CBF) with MRI (perfusion weighted imaging-PWI) and CT perfusion (CTP) can be performed routinely with standard clinical scanners. Patients with evidence of large volumes of tissue with low CBF, that is also structurally intact, as demonstrated by either normal signal on Diffusion weighted imaging (DWI) or normal cerebral blood volume (CBV) are considered to have penumbral patterns. Patients with penumbral patterns appear to be the ideal candidates for thrombolytic therapy, regardless of time from onset. Study Hypotheses The primary aim of this study is to demonstrate the feasibility and safety of TNK based thrombolysis in ischemic stroke patients presenting 4.5-24 hours after symptom onset. It is hypothesized that treatment with TNK in patients with penumbral patterns will be associated with reperfusion, early neurological improvement and penumbral tissue salvage. Study Design The study is planned as an open label feasibility and safety study of acute treatment with TNK in ischemic stroke patients with penumbral patterns evident on advanced MRI or CT perfusion sequences. Study Outcomes The primary outcome of this study is a safety endpoint, specifically the frequency of symptomatic hemorrhagic transformation evident on MRI or CT images on 24 h or day 5 scans. The ECASS II system for rating hemorrhagic transformation will be applied to all GRE/SWI images Significance Current treatment paradigms have not permitted success of tPA to be extended beyond narrow and limiting therapeutic window of 4.5 hours. Clearly, more effective patient selection criteria are required. Penumbral imaging is biologically plausible, practical and has been shown to be predictive of outcome. Application of these imaging techniques to the acute stroke population is the most promising strategy for extending the therapeutic window and for introducing superior thrombolytic agents.

This randomized trial tests the effect of early blood pressure reduction on major disability and death among patients with acute ischemic stroke in china.

This trial will enroll patients that have been diagnosed with a transient ischemic attack (TIA) or minor stroke that has occurred within the past 12 hours. Anyone diagnosed with a minor stroke faces the possibility of long-term disability and even death, regardless of treatment. Stroke symptoms such as weakness, difficulty speaking and paralysis may improve or worsen over the hours or days immediately following a stroke. The purpose of this research trial is to study the effects of a clot-dissolving drug, tenecteplase (TNK-tPA), as a treatment for patients who arrive within twelve hours from stroke onset. This study is attempting to see if TNK-tPA given through a vein in the arm (intravenous) to patients is a safe treatment for stroke patients. Neither the safety nor the effectiveness of this treatment has been proven yet. This trial will be conducted at several site in Canada. Dr Michael Hill and Dr. Shelagh Coutts are the Principal Investigators of this trial, coordinated at the University of Calgary, Foothills Medical Centre.

The LAST study is a Norwegian multi site randomised controlled trial that intends to assess the effect of a long term follow up program after stroke. The program consists of a coordinating physiotherapist who will encourage and motivate included patients to perform at least 60 minutes of intensive motor training every week and 30 minutes of physical activity every day for 18 months after inclusion. The primary hypothesis is that patients receiving a long term follow up program after stroke will have better motor function at end of follow up than patients receiving standard care. A total of 390 home dwelling stroke patients living in the municipality of Trondheim, Asker and Bærum will be included at the out-patient clinic at St. Olavs Hospital or Bærum Hospital three months after their stroke. Included patients will be randomised to an intervention group receiving the long term follow up program or to a control group receiving standard care. Motor function, mental health and physical functioning in daily life will be assessed at inclusion and 18 months later. The LAST study is funded by the Norwegian Research Council, the Norwegian University of Science and Technology and the Central Norway Regional Health Authority and will conclude at the end of 2015.

The purpose of this study is to determine whether the combined treatment with Uric Acid and rtPA is superior to rtPA alone in terms of clinical efficacy in acute ischemic stroke patients treated within the first 4.5 hours of symptoms onset.

The purpose of this study is to determine the safety, tolerability, and to explore the possible benefit of extended-release niacin (Niaspan®) in attempting to improve the recovery of patients after ischemic stroke.

To compare the effect of losartan vs amlodipine-based antihypertensive therapy on atherosclerotic inflammatory markers and cerebrovascular regulation in Ischemic stroke patients.

Randomized, control, open label, multicentre clinical study. The patient who are in accordance with subject inclusion and exclusion criteria will be randomized to A group: Routine treatment B group: Routine treatment+ Cilostazol; C group : Routine treatment + Probucol; D group: Routine treatment+ Cilostazol+ Probucol .