Active clinical trials for "Ischemic Stroke"

The aim of this study is to evaluate the low-response prevalence of early antiplatelet therapy and to test the influence of different aspirin dosages in patients with acute ischemic strokes (AIS).

In order to observe the influence of the Dengzhan Shengmai Capsule on the endpoint of patients with ischemic stroke, we hold the multi-centered prospective cohort study. From November 2007 to December 2009, 12000 subjects are included in 200 clinical research centers all over China. The subjects naturally formed two cohorts based on taking Dengzhan Shengmai capsule or not. The basic therapy included antiplatelet aggregation , stroke health education, management of blood pressure, blood lipid and blood glucose, etc. Then all of the subjects are visited on the 360th day after inclusion. The recurrence of stroke, cardiovascular events, and peripheral arterial events are observed.

The aim of the study is to evaluate the use of combined fluid attenuated inversion recovery (FLAIR) imaging and diffusion weighted imaging (DWI) as surrogate marker of lesion age within the first 6 hours of ischemic stroke in order to identify patients ≤ 3 or ≤ 4.5 hours of symptom onset in a large multicenter study hours of ischemic stroke. The investigators hypothesize that the pattern of a visible lesion on DWI together with a negative FLAIR ("DWI-FLAIR mismatch") will identify patients ≤ 3 hours of symptom onset with >80% specificity and positive predictive value.

To investigate the Endovascular Treatment difference between Chinese city and country hospital.

We aim to optimize the radiological selection and the transfer model in patients with a 6-24h stroke for a fairer and broader access to a reperfusion treatment. The specific objectives are: To confirm that the selection of patients for reperfusion therapies in the late window is safe by applying the same clinical and imaging criteria recommended by clinical guidelines for the early window treatment selection. To evaluate the performance of non-contrast CT by applying immediate post-processing software for the selection of patients for reperfusion treatment in the late window. To analyze the prehospital and arrival variables at the primary stroke center to generate decision trees that optimize the transfer decision in patients with activation of the stroke code in >6h from the onset of symptoms. METHODOLOGY: Study based on a mandatory, prospective, multicenter registry (CICAT registry) consisting of two phases retrospective analysis with a detailed evaluation of the images of the included patients and generation of "machine learning" models that accurately predict the probability of receiving reperfusion treatment in the late window. validation of the models in a prospective study. Clinical, radiological and transport variables will be studied. Response variables: rate of patients receiving reperfusion treatment in the late window, functional prognosis at 90 days, hemorrhagic transformation, and mortality.

This is a comparison of clinical outcomes between a pre-hospital and an in-hospital thrombolysis patient registry.

The aim of this study is to clarify treatment status and clinical results of acute cerebral ischemia after approval of clot retriever in Japan, and also to obtain a basis for comparative studies.

While perinatal ischemic stroke is the most frequent form of childhood stroke, early determinants of outcome remain poorly understood. Two main structural biases limit the accuracy of most studies: heterogeneity of the population and short follow-up. Perinatal ischemic stroke includes several conditions that differ in pathophysiology and timing of occurrence. Yet, it is not surprising that risk factors and outcome depend primarily on the type of stroke. Age at evaluation also plays a major role after a neonatal insult. Even though the original lesion is static and focal in perinatal stroke, its consequences grow over time within the maturing brain and affect all fields of neurodevelopment. The objective of the AVCnn study was to delineate the determinants, clinical and imaging presentation, mechanism, and long term outcome of a category of perinatal stroke (neonatal arterial ischemic stroke: NAIS). This led to the AVCnn cohort, which now gives us the opportunity to regularly monitor a large cohort of children having suffered an NAIS.

The overall goal of the CTP to predict Response to recanalization in Ischemic Stroke Project (CRISP) is to develop a practical tool to identify acute stroke patients who are likely to benefit from endovascular therapy. The project has two main parts. During the first part, the investigators propose to develop a fully automated system (RAPID) for processing of CT Perfusion (CTP) images that will generate brain maps of the ischemic core and penumbra. There will be no patient enrollment in part one of this project. During the second part, the investigators aim to demonstrate that physicians in the emergency setting, with the aid of a fully automated CTP analysis program (RAPID), can accurately predict response to recanalization in stroke patients undergoing revascularization. To achieve this aim the investigators will conduct a prospective cohort study of 240 consecutive stroke patients who will undergo a CTP scan prior to endovascular therapy. The study will be conducted at four sites (Stanford University, St Luke's Hospital, University of Pittsburgh Medical Center, and Emory University/Grady Hospital). Patients will have an early follow-up MRI scan within 12+/-6 hours to assess reperfusion and a late follow-up MRI scan at day 5 to determine the final infarct.

The purpose of this study is the evaluation and comparison of blood pressure variability indices and ambulatory arterial stiffness index obtained by ambulatory blood pressure monitoring as prognostic indicators in the functional outcome of acute ischemic stroke.