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Filter by:The investigators propose to conduct a randomized 6-month intervention study comparing cognitive functioning in individuals with relapsing-remitting multiple sclerosis assigned to either a physical activity or an active water-intake control group. Individuals will complete pre-, mid- and post-assessments of cognitive, physical, and behavioral functioning.
This is a prospective, multicenter, randomized, double-blinded, placebo-controlled Phase 3 study of a microbiota suspension of intestinal microbes. Patients who have had at least one recurrence after a primary episode and have completed at least one round of standard-of-care oral antibiotic therapy or have had at least two episodes of severe Clostridioides difficile infection (CDI) resulting in hospitalization within the last year may be eligible for the study. Subjects who are deemed failures following the blinded treatment per the pre-specified treatment failure definition may elect to receive an unblinded dose of RBX2660.
There is no specific therapy for acute kidney injury. It is presumed that supportive measures improve the care and outcome of patients with acute kidney injury. The investigators hypothesize that the implementation of a bundle of supportive measures adapted to patients undergoing cardiovascular surgery reduces the occurence of AKI. A Randomized prospective multicenter trial is needed to investigate whether the implementation of the bundle of measures is effective to prevent AKI in high risk patients undergoing cardiac surgery. In this feasibility trial the investigators will analyze the compliance rate to the trial protocol in a multicenter, multinational cohort in preparation for a large randomized controlled trial.
It is estimated that by 2016, nearly 50% of HIV-positive individuals in the US will be aged 50 or older, and up to 60% of those will experience some degree of cognitive impairment as they age. The purpose of this study is to evaluate the contribution of the neuronal cholinergic receptor system to the cognitive impairments seen in adults aging with chronic HIV Infection. By using anti-cholinergic challenge drugs to reversibly "stress" cognitive functioning, the investigators hope to understand whether the presence of the HIV virus in the brain impairs the neural system necessary for normal cognition, more than would be expected from normal cognitive aging.
mTBI is a leading cause of sustained physical, cognitive, emotional, and behavioral deficits in OEF/OIF/OND Veterans and the general public. However, the underlying pathophysiology is not completely understood, and there are few effective treatments for post-concussive symptoms (PCS). In addition, there are substantial overlaps between PCS and PTSD symptoms in mTBI. IASIS is among a class of passive neurofeedback treatments that combine low-intensity pulses for transcranial electrical stimulation (LIP-tES) with EEG monitoring. Nexalin is another tES technique , with FDA approvals for treating insomnia, depression, and anxiety. LIP-tES techniques have shown promising results in alleviating PCS individuals with TBI. However, the neural mechanisms underlying the effects of LIP-tES treatment in TBI are unknown, owing to the dearth of neuroimaging investigations of this therapeutic intervention. Conventional neuroimaging techniques such as MRI and CT have limited sensitivity in detecting physiological abnormalities caused by mTBI, or in assessing the efficacy of mTBI treatments. In acute and chronic phases, CT and MRI are typically negative even in mTBI patients with persistent PCS. In contrast, evidence is mounting in support of resting-state magnetoencephalography (rs-MEG) slow-wave source imaging (delta-band, 1-4 Hz) as a marker for neuronal abnormalities in mTBI. The primary goal of the present application is to use rs-MEG to identify the neural underpinnings of behavioral changes associated with IASIS treatment in Veterans with mTBI. Using a double-blind placebo controlled design, the investigators will study changes in abnormal MEG slow-waves before and after IASIS treatment (relative to a 'sham' treatment group) in Veterans with mTBI. For a subset of participants who may have remaining TBI symptoms at the end of all IASIS treatment sessions, MEG slow-wave changes will be recorded before and after additional Nexalin treatment. In addition, the investigators will examine treatment-related changes in PCS, PTSD symptoms, neuropsychological test performances, and their association with changes in MEG slow-waves. The investigators for the first time will address a fundamental question about the mechanism of slow-waves in brain injury, namely whether slow-wave generation in wakefulness is merely a negative consequence of neuronal injury or if it is a signature of ongoing neuronal rearrangement and healing that occurs at the site of the injury.
Preventing contextual errors requires heightening clinician responsiveness to clues that there are contextual factors during the clinical encounter, in real time. These clues, termed contextual red flags are evident in two sources: the medical record and from patients directly. An effective intervention would prompt clinicians to determine whether there are underlying contextual factors that could be addressed in the care plan, averting contextual error. This desirable process is termed contextual probing. While clinical decision support (CDS) has been used to provide physicians with timely biomedical information at the point of care to prevent errors and promote appropriate care, this technology also affords an opportunity to draw physician attention to both contextual red flags and contextual factors in order to avert contextual errors. This study assesses the potential of "contextualized CDS" to improve contextualization of care through a randomized controlled intervention trial, with assessment measures of both patient health care outcomes and averted costs associated with overuse and misuse of medical services. The three hypotheses are that CDS: 1. Reduces contextual error: CDS tools that inform clinicians of contextual factors and prompt them to explore contextual red flags should result in a reduction in contextual error. 2. Improve health care outcomes: Contextualized CDS predicts improved health care outcomes defined as a partial or full resolution of the contextual red flag (e.g. elevated HgB A1c) after the index visit. 3. Reduces avoidable health care costs: Contextualized CDS is associated with a reduction in misuse and overuse of inappropriate or unnecessary medical services.
Cardiovascular diseases (CVD) are responsible, throughout the world, for high mortality rates and cardiovascular morbidity. Endothelial dysfunction is the earliest marker of clinical atherosclerosis development. Human studies show that endothelial and microvascular dysfunction are independent predictors of ischemic cardiovascular events and long-term prognosis. The study´s objective is to evaluate the endothelial and peripheral microcirculation changes by venous occlusion plethysmography (VOP), nailfoldvideocapillaroscopy (NVC) and serum biomarkers in patients with myocardial ischemia detected by scintigraphy and normal coronarography.
Aortic stenosis is a common heart valve disease and due to the growing elderly population the prevalence is increasing. The disease is progressive with increasing calcification of the valve cusps. A few attempts with medical preventive treatment have failed, thus presently the only effective treatment of aortic stenosis is surgery. This study will examine the effect of menaquinone-7 (MK-7) supplementation on progression of aortic valve calcification (AVC). The investigators hypothesize that MK-7 supplementation will slow down the calcification process.
There are several local anesthetic techniques available for cataract surgery and the choice depends on patient, surgical and operator factors. The eyes of patients with axial myopia (the eye globe is abnormally elongated) have thin wall (sclera), limited space for needle insertion for local anesthetic injection between the globe and the orbit and out-pouching of the back of the eye (staphyloma). These factors increased the risk of perforation following conventional needle techniques of eye block The current study technique is per-caruncular injection (the needle insertion site is between the nasal side of the globe and bony orbit) which may provide a safer alternative to the conventional needle techniques for myopic patients. The space of injection is devoid of blood vessels moreover, myopic staphylomata are infrequently located on the nasal side of the globe. Local injection of muscle relaxant added to local anesthetic solution may provide earlier onset of eye muscle paralysis thus earlier onset of favorable surgical condition than local anesthetic solution alone. The current study will demonstrate the effect of adding low dose atracurium (a muscle relaxant) to local anesthetic mixture in providing early onset of eye muscle paralysis and favorable surgical condition in per-caruncular technique of eye block in high myopes undergoing cataract surgery.
The overall objective of this study is to conduct a two-group randomized trial to examine the efficacy of cognitive-behavioral based physical therapy (CBPT) for improving knee function, return to sport, and quality of life outcomes in patients following ACL reconstruction (ACLR). The study consists of two treatment groups: telephone-based cognitive-behavioral based physical therapy for ACLR (CBPT-ACLR) and telephone-based Education. The central hypothesis is that the CBPT-ACLR participants relative to the Education group will demonstrate significantly greater improvement in postoperative outcomes at 12 months following surgery.