Investigators primary aim is to carry out a two-site, randomized, double-blind, sham-controlled, phase II trial to systematically examine the potential for aerobic exercise (AEx) to enhance the anti-depressant benefits of rTMS in individuals with post-stroke depression (PSD). Investigators propose to determine the efficacy of combining two known anti-depressant treatments shown to be effective in non-stroke depression, aerobic exercise (AEx) and repetitive transcranial magnetic stimulation (rTMS), on post-stroke depressive symptoms. This project is based on the idea that depression negatively affects the potential for the brain to adapt in response to treatment such that rehabilitation may not produce the same changes that it does in non-depressed individuals. Investigators believe that effective treatment for PSD will result in a virtuous cycle whereby reducing depression enhances response to rehabilitation, thereby facilitating functional gains. That is, effectively treating depression will enable individuals to better recover from stroke.
This project will determine whether aerobic exercise enhances the anti-depressant benefits rTMS in individuals with PSD through a two-site, prospective, randomized trial. Over a five-year period, 96 subjects (12-60 months post-stroke) will be assigned to complete 12 weeks of treatment with rTMS, treadmill AEx or both (i.e., rTMS+AEx). Treatments will take place three times per week on non-consecutive days. Assessments of depression (HAM-D17) and walking capacity (6MWT) will be performed at two-week intervals throughout treatment as well as 12- and 24-weeks following cessation of treatment, allowing determination of the efficacy (and persistence) of training on these outcomes. Secondary outcomes will include measures of community walking (steps per day) and quality of life (Stroke Impact Scale) collected pre-, mid- and post-training, as well as at the follow-up time points. Last, investigators will explore potential biomarkers of response via assessment of PAS-induced neuroplastic potential and MR imaging to identify changes in cortical grey matter thickness.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
96
Subjects will undergo rTMS to the left dorsolateral prefrontal region as a treatment for depression. Treatment will be performed three times per week for 12 weeks (36 sessions) . We will use a standard resting motor threshold (rMT) determination from unaffected abductor pollicis brevis. Treatments will be delivered at the EEG coordinate for F3 (approximating the left DLPFC) and will be found using the Beam-F3 method. A total of 5000 pulses/session will be delivered at 10Hz with an intensity of 120% of rMT.
The goal of AEx will be 20 minutes of continuous walking at an intensity of \~70% of heart rate reserve (HRR calculated via the Karvonen method). The desired intensity will be achieved by a combination of increasing treadmill speed and incline. Rest breaks will be allowed as needed during training with the goal of progressing to 20 minutes of continuous walking.
Duke University School of Medicine
Durham, North Carolina, United States
ACTIVE_NOT_RECRUITINGMedical University of South Carolina
Charleston, South Carolina, United States
RECRUITINGSeverity of depressive symptoms
The Hamilton Depression Rating Scale (HAM-D17) is the gold-standard for clinical trial outcomes and samples a broad array of depressive symptoms. Critically, the rater administering the HAM-D17 will be clinically trained and will blinded to all other aspects of the study. For this trial, depression severity will be classified as moderate (HAM-D17 = 14-19) or severe (HAM-D = 20-25) for the purpose of stratification and diagnosed upon enrollment using the Structured Clinical Interview for Depression according to the Diagnostic \& Statistical Manual of Mental Disorders, 5th Edition (DSM-V).
Time frame: baseline, after 2,4,6,8,10 and 12 weeks of treatment
six-minute walk test
Distance walked in 6 minutes
Time frame: baseline, after 2,4,6,8,10 and 12 weeks of treatment
Step activity monitoring
Daily step count
Time frame: baseline, after 2,4,6,8,10 and 12 weeks of treatment
Stroke Impact Scale
Assesses multiple domains of stroke recovery on a scale from 0 to 100, including strength, hand function, activities of daily living and instrumental activities of daily living, mobility, communication, emotion, memory and thinking, and participation, with higher scores representing better recovery
Time frame: baseline, after 2,4,6,8,10 and 12 weeks of treatment
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