12 Clinical Trials for Various Conditions
This study will determine if electrical brain stimulation during movement practice can improve the ability of stroke patients to reach for objects more than movement practice alone. People between 18 and 85 years old who have had a stroke may be eligible for this study. Participants are randomly assigned to one of two study groups: movement training with active (tDCS) or movement training with sham (tDCS). Participants will undergo 1-hour movement training and (tDCS) sessions twice a day, 5 days a week, for 3 weeks. For these sessions, subjects will sit in front of a computer screen that shows a target (round dots) and a cursor (a line). Participants will be instructed to move the cursor to various targets on the computer screen as fast and as accurately as possible, controlling the position of the cursor by moving their arm, which will rest on a mechanical device. Participants will receive real or sham (tDCS) during the movement training sessions. For (tDCS), electrode sponges soaked in tap water are placed on the scalp and forehead. A small electrical current is passed between the electrodes. The stimulation lasts 20 minutes. Patients will have the following tests four times during the study - 1) before starting movement training 2) (tDCS) during the course of training and (tDCS), 3) after completing training and (tDCS), 4) and 3 months after completing training and (tDCS): Functional magnetic resonance imaging (fMRI) Magnetic resonance imaging (MRI) uses a magnetic field and radio waves to take pictures of the brain. Functional MRI (fMRI) shows what parts of the brain are used when a task is performed. For the test, the subject lies on a table that can slide in and out of the scanner. A computer screen can be seen from inside the scanner. During the scan, subjects may be asked to do the study task or to lie still for up to 20 minutes at a time. Movement and function tests * Measurement of arm stiffness * Moving the arms actively and against resistance * Picking up objects and moving them as quickly as possible * Performing daily living tasks like buttoning, dressing and walking * Performing tasks while wearing a glove that monitors the position of the arm * Completing questionnaires on ability to perform daily activities or other movements and level of tiredness Transcranial magnetic stimulation (TMS) TMS uses a magnet to stimulate the brain in way that is different from (tDCS). This study us...
Pilot study testing the Bipap autoSV Advanced Algorithm during full night, in-lab polysomnography (PSG) and 3 months at home on patients with Central Sleep Apnea, Hunter Cheyne Stokes Respiration, or Complex Sleep Apnea.
The primary objective of this study is to evaluate the safety and effectiveness of Abbott's Amulet™ 2 Left Atrial Appendage (LAA) occluder device (Amulet 2 device) in patients who have non-valvular atrial fibrillation and who are at increased risk for stroke and systemic embolism and have appropriate rationale to seek a non-pharmacologic alternative to oral anticoagulation.
The purpose of this study is to evaluate the accuracy of Somnarus diagnostic technology for diagnosis of sleep apnea in human subjects. This includes evaluation of Somnarus technology in Obstructive Sleep Apnea (OSA) and Central Sleep Apnea (CSA), including Cheyne - Stokes respiration (CSR).
The purpose of this study is to demonstrate diagnostic agreement and determine the accuracy of the continuous positive airway pressure (CPAP) device compared to simultaneous, attended clinical polysomnography (PSG) in identifying breathing events in participants previously diagnosed with complex sleep apnea (CompSAS), complex sleep apnea with Cheyne-Stokes respiration (CSR), or obstructive sleep apnea (OSA).
The purpose of this study is to determine the chronic safety and efficacy of phrenic nerve stimulation on central sleep apnea (CSA). Clinically, CSA events translate into sleep fragmentation, excessive daytime sleepiness, reduced exercise capacity, and possibly ventricular arrhythmias. The study is chronic in nature, such that subjects will undergo the implantation of an implantable pulse generator and stimulation lead. A sensing lead may also be placed during the initial implant procedure. Subjects will be followed for up to six-months on therapy to assess respiratory and heart failure outcomes. Following the six-month therapy visit, subjects will enter into a long-term follow-up phase until the completion of the study. It is anticipated that data obtained in this study will show that the proposed intervention can modify respiration with a low incidence of adverse effects. The results of this trial are intended to be used to develop a subsequent protocol for pivotal study.
The purpose of this feasibility study is to determine the effect of stimulating the phrenic nerve to treat periodic breathing (a pattern of breathing characterized by hyperpneas followed by hypopneas or apneas). Clinically, these physiologic events translate into sleep fragmentation, excessive daytime sleepiness, reduced exercise capacity, and possibly ventricular arrhythmias. Stage 1 of the study is acute in nature, such that subjects will undergo the placement of a stimulation lead, followed by assessment of stimulation of the phrenic nerve using the lead for up to 2 nights of sleep. A sensing lead may also be placed during the initial implant procedure. Observational data will be obtained and stimulation provided using an externalized system connected to the study leads. Following the study, all investigational components will be removed from the patient. Stage 2 of the study is being conducted at one of the participating sites to determine the initial safety of chronic stimulation of the phrenic nerve in a limited number of patients with sleep disordered breathing. It is anticipated that data obtained in this feasibility study will show that the proposed intervention can modify respiration with a low incidence of adverse effects. The results of this trial are intended to be used to develop a subsequent protocol for a multi-center study of chronic phrenic nerve pacing.
An exoskeleton device is a robotic system designed to improve an individual's ability to move and perform tasks encountered in everyday situations. These devices consist of external rigid limb segments that assists humans through different body movements with the use of actuators. These devices are controlled by an onboard computer that determines the timing and magnitude of assistance deployed to the user. Exoskeleton controller performance is key to providing beneficial assistance that does not inhibit the user's movement. Preceding work will compare the benefit of personalized hip versus ankle joint exoskeleton assistance for improvement of post-stroke gait. It will combine exoskeleton technology with the user's movement feedback to improve wearable robotic assistance to an individual stroke survivor's gait pattern. For the clinical trial research covered under this protocol, the investigator will test various exoskeleton technologies with stroke survivors in real-world contexts, indoors and outdoors, and measure clinically meaningful outcomes and user perceptions regarding technology usability and adoption. The long-term goal is to deploy self-adaptive, adoptable exoskeletons for personalized assistance during community ambulation.
The purpose of this study is to assess the changes in language processing of patients with chronic, post-stroke aphasia following the application of brain stimulation. The brain stimulation the investigators administer is called transcranial direct current stimulation (tDCS). It involves passing a weak electrical current through the brain between two electrodes in the form of damp sponges. One sponge will be placed over a specified area on the damaged left hemisphere, while the other sponge will be placed on the right scalp. Computer-controlled speech-language treatment will be administered during the application of tDCS.
The purpose of this study is to determine whether super-selective intra-arterial administration of verapamil immediately following successful intra-arterial thrombolysis is safe as a potential neuroprotective agent. Standard procedures are cerebral angiography and intra-arterial thrombolysis (intra-arterial administration of tPA and/or mechanical thrombectomy). Experimental procedure is superselective injection of verapamil intra-arterially.
The aim of the study is to compare the effects of MV targeted ASV in addition to optimized medical therapy versus optimized medical therapy alone at 6 months in patients with acute decompensated HF. The study will also assess changes in functional parameters, biomarkers, quality of life (QOL), and sleep.
The purpose of this study is to determine whether reducing a patients body temperature (mild hypothermia of 33 degrees Centigrade) will significantly reduce the risk of brain injury (notably reperfusion injury and hemorrhagic conversion) in patients that have suffered a significant interruption of blood flow to an area of brain (occlusion of large proximal cerebral artery) and have undergone successful removal of that interruption (revascularization).