Active clinical trials for "Cerebral Infarction"

An extracranial-to-intracranial (EC-IC) revascularization is the most widely used treatment to improve cerebral perfusion in patients with moyamoya disease (MMD), and it has been shown to reduce the risk of subsequent stroke and neurological deficit. However, perioperative changes in cerebral hemodynamics can induce fluctuations in cerebral perfusion that may lead to transient or irreversible neurological deficits. Our preliminary single-center study suggests that postoperative intravenous administration of dl-3-n-butylphthalide (NBP) may alleviate perioperative neurological deficits and improve the neurological outcomes after EC-IC revascularization for MMD. This is a multicenter, randomized, double-blind, single-controlled, add-on to standard of care study of NBP in patients with MMD of high risk for ischemic cerebrovascular events after EC-IC revascularization surgery.

The purpose of the study is to examine the influence of demographic, clinical and laboratory characteristics on the presence and size of penumbra in acute ischemic stroke patients and to determine those of them which related significantly and independently to the presence and size of Penumbra. The examined factors will include demographic variables such as age, gender, ethnic background, vascular risk factors and medical history, clinical parameters such as time from stroke onset until arrival to the hospital, results of neurological evaluation by NIHSS and imaging findings, laboratory tests such as body temperature, blood pressure, glucose level, renal functions etc. and imaging findings - the presence and the size of collateral blood vessels, the state of carotid arteries (by CTA). The possible correlation between all this parameters and the presence and the size of penumbra as detected by CTP will be further examined.

The purpose of this study is to determine the clinically meaningful definition and prevalence of aspirin resistance based on data linking aspirin-dependent laboratory tests to recurrent vascular events in cardiovascular patients taking aspirin.

The purpose of the study is to use diffusion tensor imaging (DTI) derived axial diffusivity and susceptibility weighted imaging (SWI) to evaluate the severity of acute ischemic stroke and to predict its functional outcome.

Cardiac surgery and neurosurgery may decrease cerebral blood flow leading to cerebral dysfunction. Regional cerebral oxygen saturation (rScO2) monitor via Near-infrared spectometry (NIRS) is recommended for early detection and correction. The standard site of NIRS sensor is forehead area which is impractical in operation with incision at forehead area. The investigators suggest an alternative sensor site at temporal area. The objective of this study is to assess the correlation of rScO2 measured from sensor attached at forehead vs. temporal area.

The purpose of the study is to evaluate the prevalence and extent of right-to-left shunt (RLS) in Chinese migraineurs, and the morbidity of silent cerebral infarction in migraineurs.

Vascular endothelial growth factor (VEGF) and Endostatin (ES) participate angiogenesis after cerebral ischemia. Circulating endothelial progenitor cells (EPCs) also play a crucial role in neovascularization and tissue repair after acute ischemic stroke (AIS). The investigators sought to compare the expression of VEGF and ES in serum and the circulating EPCs in patients after AIS with that of healthy control subjects. The investigators obtained peripheral blood and serum samples from study subjects. EPCs in blood samples from AIS patients and healthy controls were quantified by flow cytometry 1 day, 3 days, 5 days and 7 days after AIS. VEGF and ES were measured by enzyme linked immunosorbent assay at the same time points. The relation between them and the relation of them to prognosis of such patients with acute ischemic stroke were assessed.

The aim of this study was to determine the prevalence rate and risk factors for chemical laboratory clopidogrel low-response (CLR) in the acute phase after an ischemic stroke.

The purpose of this study is to determine whether there is a significant decrease in cerebral oxygen saturation in hypertensive patients undergoing major abdominal surgery and their correlation with standard monitoring parameters.

Investigation of the incidence of endocrine dysfunction following subarachnoid hemorrhage (SAH), and to see if this has a relation to CNS lesions as evaluated by MRI and to common symptoms after SAH such as general exhaustion, lack of initiative, increased sleep demand and reduced quality of life.