Active clinical trials for "Ischemic Attack, Transient"

Sodium imbalance is common and an adverse prognostic factor in hospitalized patients. However, identifying the causes of sodium imbalance is challenging in clinical practice. Levels of antidiuretic hormone (ADH) are elevated in patients with stroke correlating with disease severity and stress level; however, its measurement is cumbersome. ADH is derived from a larger precursor peptide along with Copeptin, which is a more stable peptide directly mirroring the production of ADH. Copeptin can be assayed readily in plasma. Early prognostic factors to predict in-hospital mortality and medium/long-term outcome in critically ill neurological patients, are helpful to guide and tailor early decisions on treatment, discharge from the intensive care unit and application of interventions to prevent deterioration of neurological functions. We hypothesize that copeptin will improve the diagnostic accuracy to diagnose sodium imbalances as compared to routinely used markers Furthermore, we hypothesize that Copeptin will be a reliable prognostic tool, dependent or independent of sodium imbalance, to predict short-term (i.e. in-hospital) and medium-term (i.e. 3 months) clinical outcome in stroke patients.

The DELPhi system is a software device that is used for the noninvasive evaluation of brain plasticity and connectivity. The DELPhi software uses EEG and TMS devices as accessories. Standard electro-physiological acquisition is performed using TMS to evoke regional neuronal potentials measured as EEG data. TMS-EEG data is analyzed with regards to conventional, well established characteristics of neuronal network plasticity and connectivity.

This study will test the feasibility of a home blood pressure telemonitoring (HBPTM) system in patients with minor stroke or TIA in the past year. The telemonitoring system will consist of a blood pressure machine and an online survey to submit blood pressure measurements. The investigators want to test whether patients can persistently use the telemonitoring system with ease and whether telephone instructions for blood pressure medications from the research nurse can be correctly understood. A secondary purpose of this study is to look at the effects of telemonitoring in blood pressure and stroke recurrence.

Laparoscopic surgery is an alternative to open surgical techniques for reasons such as less blood loss,less need for transfusion, shorter discharge time. In laparoscopic cases, various positions are given to patients, especially trendelenburg, in order to remove organs and see the area of the operation more easily. The Trendelenburg position causes cerebrovascular changes.Several studies have reported an increase in intracranial pressure (ICP)at the Trendelenburg position. There are also studies that show brain tissue oxygen saturation (SctO2) decreases in this position. Research has reported that cerebral perfusion pressure decreases if the position lasts longer.When pneumoperitonium is administered during laparoscopic surgery, cerebral blood flow may increase as a result of the increase in PaCO2.Brain tissue oxygen saturation depends on blood flow.There is also an inverse ratio between end tidal CO2. To prevent deterioration of cerebral function, methods are needed that determine the onset of desaturation and make early intervention possible. The method,known as near-infrared spectroscopy (NIRS), offers a fixed non-invasive and safe method of determining cerebral desaturation.In addition, NIRS has the potential to improve patient outcomes, reduce postoperative complications and duration of post-anesthesia care.Changes in NIRS measurement values associated with position, especially today, are seen in cerebral perfusion in patients undergoing major surgery, oxygenation and postop have been associated with cognitive dysfunction in the process.Postoperative cognitive dysfunction is associated with increased mortality and therefore it is very important to identify factors that increase risk in order to take appropriate protective measures.Intracerebral ischemia and desaturation may be responsible for the development of POCD. In this study, we aimed to observe NIRS changes due to Trendelenburg position and pneumoperitonium in patients undergoing laparoscopic major abdominal oncological surgery and to examine the effect of POCD on early stage.

Study Design: This is an investigator-initiated prospective, open label, single arm phase IV study. Patients with documented non-valvular atrial fibrillation (AF) with acute TIA (defined as acute focal neurological deficits, with complete resolution of symptoms within 24 h of onset) or ischemic stroke, irrespective of infarct volume or clinical severity will be enrolled. Study Aim and Objectives: The overall aim of this study is to demonstrate the feasibility and safety of initiating apixaban therapy within 14 days of TIA or ischemic stroke regardless of the size and severity in patients with AF. Investigators will systematically assess prospectively collected CT scan images for evidence of HT and re-infarction.

The objective of this study is to investigate the effectiveness of prehospital diagnosis and, when appropriate, of intravenous thrombolytic treatment of ischemic stroke. At the same time, we will take the opportunity to do an explorative study with the aim to further improve the intervention by biomarkers, and outcome measures volumetric measured by MRI images. The intervention study aim to: Determine the time from symptom onset to thrombolytic treatment in the Mobila Stroke Unit (MSU) compared to the conventional model Determine the number of patients receiving thrombolytic treatment within the 4.5 hrs window in the MSU compared to the conventional model Determine if thrombolytic treatment in the MSU, when adjusted for time, results in better mRS- and Barthel outcome compared to treatment in the conventional model The explorative study aim to Determine if final IS infarction volume estimated by MRI, is independently correlated with time from symptom onset to thrombolytic treatment Define cut-off values for GFAP and RBP4 combined that with sufficient specificity and sensitivity can distinguish ICH from IS Determine the influence of time to treatment on pro-inflammatory markers after stroke Hypothesis Intervention study I. The Treat - NASPP MSU model is feasible and reduces onset to treatment time less than 15 min II. The number of patient treated with thrombolysis within 4.5 hrs of symptom onset is significantly increased in the Treat-NASPP MSU model III. Treatment in the Treat-NASPP MSU model does not result in increased day 90 mRS and Barthel as compared to the conventional model when adjusted for time IV. Prehospital thrombolytic treatment of stroke does not increase the risk of secondary cerebral bleeding as compared to in-hospital thrombolytic treatment of stroke (cerebral bleeding worsening within 36 hrs less than 4 per cent, Norsk hjerneslagregister) Explorative study V. The final infarct volume, estimated by MRI, is significantly reduced when thrombolytic treatment is initiated already in the MSU VI. Biomarkers is a valid tool in the hyper acute phase of cerebral illness to exclude contraindication to thrombolysis VII. Reduced onset to treatment time results in lower levels of selected pro-inflammatory molecules

The aim of this study is to evaluate the role of atrial fibrillation (AF) and its treatment in relation to thromboembolic events (stroke, and transient ischemic attacks) and intracranial hemorrhage. Primary Outcome Measures: - Incidence and timing of intracranial complications (stroke,TIA, bleedings) in relation to diagnosis and anticoagulation treatment of AF during the study period; comparison of complications between those with and without anticoagulation treatment according to CHADSVASc score. Secondary Outcome Measures: The effect of anticoagulation pauses and INR level on stroke and bleeding risk; strokes within 30 days after anticoagulation pause and the prevalence of stroke and intracranila bleeding in relation to INR level < 2, 2-3 and >3. Trauma as a risk factor for intracranial bleeding: percentage and risk factors for intracranial bleeding with or without trauma. Type of preceding trauma and type of intracranial bleeding. The time relation between diagnosis of AF and type of intracranial complications: Kaplan Meier analysis of thrombotic (Stroke/TIA) and intracranial bleeding complications after 1st diagnosis of AF in patients with and without anticoagulation The risk of stroke and intracranial bleeding in relation to CHADSVASc score, HAS-BLED score and anticoagulation/antithrombotic treatment Prognosis of stroke and intracranial bleeding: 30-day mortality after stroke and intracerebral bleeding in patients with and without anticoagulation Factors related to underuse of anticoagulation treatment. Data on reasons for not starting or stopping aticoagulation in those with indication of oral anticoagulation Operations and procedure as risk factor for stroke: Frequency and type of operations performed < 30 days before stroke. Data on length of perioperative pause in anticoagulation and use of bridging therapy and timiing of stroke are collected. Cardioversions as a risk factor for stroke: Frequency of stroke and TIA < 30 days after cardioversion in relation to use of anticoagulation and CHADSVASc score The risk of stroke and intracranial bleeding in relation to type of AF (permanent, persistent, paroxysmal) and concomitant carotid disease Estimated Enrollment: 6000 patients.

The purpose of this study is to determine how well patients undergoing carotid endarterectomy will perform on a battery of tests to assess brain function before and after surgery as compared to a control group of patients undergoing spine surgery. This study will serve to: (a) determine incidence of neurologic/neuropsychometric change in patients undergoing carotid artery surgery, and (b) to ascertain the time it takes for these changes to resolve.

Atrial fibrillation is the most common cardiac cause of ischemic stroke. Detecting atrial fibrillation after a stroke or TIA is critical because highly effective secondary stroke prevention therapy is available for individuals who are recognized to have atrial fibrillation. However, atrial fibrillation is likely under-diagnosed after stroke and TIA because atrial fibrillation is often difficult to detect as it is frequently paroxysmal and asymptomatic, and patients do not routinely undergo prolonged screening. The purpose of this study is to determine the diagnostic yield of a novel 30-day cardiac event monitor compared to a repeat 24-hour Holter monitor for detecting occult paroxysmal atrial fibrillation in patients with a recent ischemic stroke or TIA of undetermined etiology after completion of a standard clinical stroke work-up (including an initial negative Holter monitor.)

Pilot study of continuing aspirin versus switching to clopidogrel after stroke or transient ischemic attack.