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Functional MRI and DTI Analysis of Post VNS Therapy Rehab Changes

NCT03945851 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 3

Last updated 2021-08-02

No results posted yet for this study

Summary

The purpose of performing magnetic resonance imaging (MRI) scans on patients undergoing stroke rehabilitation therapy in conjunction with vagal nerve stimulators (VNS) is to determine if the patients clinical improvement correlates to changes that can be identified on MRI of the brain such as degree of blood oxygen level dependent (BOLD) signal, changes in resting state connectivity, and corticospinal tract fiber density.

Subjects will be randomized at implant surgery to either the device treatment (rehabilitation and VNS) or control (rehabilitation and Control VNS) groups. All participants of this study are also participants of the STU 062017-071 study and chose to participate in this functional magnetic resonance imaging (fMRI) sub-study. Rehabilitation is standard of care.

Both experimental groups and control groups will receive pre-rehabilitation and post-rehabilitation fMRI and diffusion tensor imaging (DTI) scans to quantify their white matter track density. We will analyze this data using the University of Texas Southwestern (UTSW) Advanced Neuroscience Imaging Research (ANSIR) pipeline which can automatically quantify white matter track density on both sides of the brain given the appropriate scans. In this study the VNS device specifically will not be studied. Rather we will be looking at the changes that occur in the brain as a result of using the VNS device during physical rehabilitation.

Once the post-rehabilitation scans are completed the patients in the control group will be given the opportunity to crossover into the experimental group and receive physical rehabilitation with the VNS implant turned on. They will have a third MRI session after their round of rehabilitation with the implant turned on in order to quantify their white matter tract density.

Conditions

  • Stroke Hemorrhagic

Interventions

PROCEDURE

fMRI

All subjects will undergo 2 fMRI sessions. Each of these sessions will span two days, and subjects will spend 15 minutes in the MRI each day. fMRI tasks will consist of subjects grasping and releasing a handgrip. The control arm subjects will be offered a third fMRI session after unblinding and therapy with activation of the VNS.

Sponsors & Collaborators

  • University of Texas Southwestern Medical Center

    lead OTHER

Principal Investigators

  • Bhavya Shah, MD · UT Southwestern Medical Center

Study Design

Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
22 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2019-04-04
Primary Completion
2021-04-28
Completion
2021-04-28

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03945851 on ClinicalTrials.gov