Active clinical trials for "Ischemia"

The present study is to determine the ability of urinary total adiponectin and its isoforms excretion in the prediction of contrast induced nephropathy (CIN) in the patients undergoing PCI.

The primary objective of this feasibility study is to determine whether it is possible to conduct a study of the ClearView scan among patients under evaluation for acute cardiovascular events, as well as give insight into the performance of the ClearView scoring algorithm with respect to this patient population. The EPIC™ scan is a bio-electrographic tool that may assist the health care provider in rapid assessment of the systemic origin of the patient's presenting symptom(s). The EPIC ClearView is a potentially valuable resource that may benefit an emergency department (ED) by offering expedited "chest pain" etiologic differentiation capabilities. The subsequent results have the potential to include more rapid "chest pain" patient diagnosis and appropriate disposition of non-cardiac chest pain (rule out MI); optimized precious resource expenditure (nursing, physician, inpatient or observation bed, etc.); lower costs to facility, patient and insurance company; and greater patient satisfaction rates due to decreased ED wait time.

Serum uric acid level is a commonly measured biomarker. The association between serum uric acid level and the risk of developing cardiovascular diseases has been observed in some studies, while others showed controversial results. Estimation of this association may help to predict cardiovascular outcomes and may guide new treatment strategies. The hypothesis is that increased serum uric acid level is associated with a range of cardiovascular diseases.

The primary aim of the current research project is to answer the question, whether plasma trimethylamine N-oxide (TMAO) level may be used as a marker of ischemic changes in the brain. TMAO is associated with endothelial dysfunction, inflammation and oxidative stress. The hypothesis is that circulating TMAO level may predict leukoaraiosis (LA) and/or stroke. Secondary, the investigators would like to examine whether plasma TMAO concentration is related to cognitive impairment and determine whether choline consumption is associated with an incidence of LA severity and dementia.

The research project investigates the incidence of the hyperintense acute reperfusion marker (HARM) in patients with transient ischemic attack (TIA) or transient neurological attack (TNA). Initially, HARM was described after acute ischemic stroke and is caused by a blood-brain barrier disorder after recanalization of an acute vessel occlusion and consecutive reperfusion. These result in a contrast agent extravasation into the subarachnoid space, which can be easily detected on fluid attenuated inversion recovery (FLAIR) images. TIA is defined as a transient focal neurological deficit with a probably cerebrovascular cause. In contrast, TNA is defined as a transient non-focal neurological deficit with multiple causes, including cerebrovascular. The clinical diagnosis of TIA is often flawed and the delineation of TIA and TNA can be difficult. MRI is the most important diagnostic method for the detection or exclusion of cerebral ischemia in patients with TIA/TNA in daily clinical practice. However, on diffusion-weighted imaging (DWI) approximately two-thirds of TIA cases and only one-fifth of TNA cases demonstrate acute cerebral ischemia. Supplementary perfusion-weighted imaging (PWI) scans can only slightly increase this percentage. The well-known HARM could prove to be complementary to DWI and PWI and close or at least reduce the existing gap. In the case of TNA in particular, this could be of clinical relevance in order to avoid mistreatment or even dismissal without further clarification after supposedly inconspicuous imaging. Therefore, the aim of this study is to record the incidence of HARM in a statistically significant number of cases of patients with TIA and TNA and to investigate relationships with symptom duration and anatomical localization. In addition, the dynamics of contrast enhancement in the subarachnoid space in TIA and TNA cases with HARM will be analyzed in detail.

Perinatal asphyxia is common cause of acquired neonatal brain injury in neonates associated with hypoxic-ischemic encephalopathy, leading to long-term neurologic complication or death. In 2000, the neonatal mortality rate in Egypt was found to be 25 per 1000 live birth. In this survey, hypoxic ischemic encephalopathy accounts for 18% of neonatal mortality and is the second most common cause of neonatal death.

Predictive factors of outcome of mechanical thrombectomy after acute ischemic stroke

The purpose of this study is to investigate the mortality and frequency of organ dysfunction in patients after endovascular thoracoabdominal aortic surgery, and to search for biomarkers of organ dysfunction, in particular the spinal cord, the kidneys and the gastrointestinal tract. All adult patients undergoing endovascular thoracoabdominal aortic surgery at Örebro University Hospital, Örebro, Sweden, are asked for participation in this study. All participating patients sign informed consent at the inclusion. During the operation and during the postoperative intensive care, the function of the spinal cord, the gastrointestinal tract and the kidneys are collected along with other clinical parameters. Plasma blood samples, urin samples and cerebrospinal fluid samples are collected from each patient during the operation and during the postoperative care at the intensive care unit. During the operation two microdialysis catheters are placed in the abdomen, and the samples are continuously collected and analyzed. The biomaterial samples are stored in a biobank for later determination of proteins and other molecules. Postoperative survival and the frequency of complications are analysed.

The femoro-popliteal arterial segment is one of the most frequent locations for atherosclerosis. Its management is mainly endovascular (standard and coated-balloon angioplasty, stenting). However, the structural features of the atherosclerotic disease in regards to patient's risk factors and past medical and surgical histories are not well studied. Furthermore, the histological analysis of the femoro-popliteal arterial segment is rare in the literature, and made difficult mostly because of the length of this segment. There is a clinical need for better understanding of atherosclerotic lesions in this location, with as further goal, a better management of this disease.

To evaluate ocular blood perfusion status and the possibility of craniocerebral vascular lesions of patients with ocular ischemia syndrome (OIS) using arterial spin labeling (ASL) magnetic resonance imaging technique. To evaluate the specificity, sensitivity and accuracy of arterial spin labeling (ASL) magnetic resonance imaging technique in OIS diagnosis, compared with the traditional routine examination method.