rTMS as an add-on Therapy in Patients With Post-stroke Depression
NCT ID: NCT03761303
Last Updated: 2019-12-17
Study Results
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Basic Information
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WITHDRAWN
NA
INTERVENTIONAL
2018-05-01
2022-11-01
Brief Summary
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Detailed Description
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Besides drug or psychotherapeutic treatment, repetitive transcranial magnetic stimulation (rTMS) is currently being used as a new non-invasive therapy for depression. The rTMS applies an electromagnetic coil to the patient's head, creating a magnetic field. Impulses emanating from the coil trigger a multitude of reactions at the point of stimulation which, for example, can alter the metabolism, lead to a release of neurotransmitters and a change in gene expression \[2-3\]. Pulses with a frequency ≤1Hz lead to a reduction of the excitability of the neurons and to an inhibition of cortical activity. In contrast, frequencies ≥5 Hz increase the excitability of neurons and increase cortical activity \[4-5\].
A large number of studies has already shown that rTMS in depressive patients leads to an improvement in depressive symptoms and has been shown to have an antidepressant effect \[6\]. In the United States, rTMS has been approved by the Food and Drug Administration (FDA) since 2008 as a treatment for patients with depression who do not respond to antidepressant drug therapy. The FDA recommends a high-frequency (10Hz) rTMS on the left dorsolateral prefrontal cortex (DLPFC) five days a week for four to six weeks \[7\]. The stimulation of the DLPFC is based on the valence hypothesis that the right hemisphere specializes in the processing of negative emotions and the left hemisphere is specialized in the processing of positive emotions \[8\] and the DLPFC controls emotional processing \[9-10\]. Activation of the left DLPFC is therefore associated with the processing of positive emotions \[11\].
About 50% of all stroke patients develop post-stroke depression (PSD) \[12\]. A meta-analysis has shown that rTMS treatment can reduce depressive symptoms in PSD patients \[13\]. In addition to rTMS alone, it is unkown if a combination therapy of rTMS plus antidepressant medication can achieve a stronger or longer-term antidepressive effect in PSD patients. Unfortunately, there are currently no trials of combination therapy with rTMS and drug therapy in PSD patients. Previous studies with depressive patients provide both results that suggest an additional effect of combination therapy \[14-19\] and results that found no difference between drug-only therapy and combination with rTMS \[20-24\]. The comparability of the studies is difficult due to the heterogeneity of the study designs. However, it is noticeable that a younger age (\<50 years), an intervention duration of rTMS of four weeks, a higher dose of the antidepressant, an inter-train interval (interval between the trains) of \<30 seconds and a total number of pulses of \<1250 per day, associated with positive effects. However, further studies are needed that address the issue of an additional effect of combination therapy. In addition, a neurological disease was considered to be an exclusion criterion in some of the studies performed \[14-15; 20; 23\]. It is therefore questionable whether the study results can be transferred to PSD patients.
Therefore, this study will investigate whether combination therapy of antidepressant and rTMS can provide additional relief of depressive symptoms compared to antidepressant and sham rTMS therapy. It is assumed that the additional active rTMS achieves a faster normalization of affect and drive than with a sham rTMS, so that the patients benefit from neurorehabilitation measures earlier and more sustainably.
Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
Patients in the experimental group (active rTMS stimulation) receive active 10 Hz rTMS stimulation over the left dorsolateral prefrontal cortex (DLPFC) over a period of 20 days, seven days a week (20 sessions). The comparison group receives a duration of equal long sham-stimulation.
For transcranial magnetic stimulation, the Stimulator "PowerMAG Research 100" (Mag \& More, Munich, Germany) is used with a cooled double coil (PMD70-pCool).
TREATMENT
DOUBLE
In addition, the "real" and the placebo coils are coded before starting studies (eg "A" and "B"). Only the uninvolved employee is the assignment to the real - or placebo coil known. The uninvolved employee randomly assigns the study code containing the information on which coil to use ("A" or "B"). In this way a blinding of performing physician, patient and the evaluating scientist is guaranteed.
Study Groups
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active rTMS
Patients in the intervetion group (active rTMS stimulation) receive active 10 Hz rTMS stimulation over the left dorsolateral prefrontal cortex (DLPFC) over a period of 20 days, seven days a week (20 sessions).
active rTMS
The rTMS coil is applied tangentially to the head surface above the left DLPF (corresponding to position F3 of the international 10-20 system). For the stimulation intensity, the motor rest threshold of the patient is determined. The motor rest threshold is defined as the minimum intensity that triggers an EMG response with an amplitude\> 50 μV in the first right interosseus dorsalis muscle in at least 5 out of 10 cases. The stimulation intensity within the rTMS therapy is 80 percent of the motor rest threshold. In one session, 1,000 pulses are applied in 10 trains at a frequency of 10 Hz (1 train = 100 pulses in 10 s). Between the individual trains there is an inter-train interval of 28 seconds. The total duration of a session is 5:52 minutes. In total, the patient recieve 20 sessions.
sham rTMS
Patients in the control group receive sham rTMS stimulation over the left dorsolateral prefrontal cortex (DLPFC) over a period of 20 days, seven days a week (20 sessions).
sham rTMS
Patients in the intervetion group (active rTMS stimulation) receive active 10 Hz rTMS stimulation over the left dorsolateral prefrontal cortex (DLPFC) over a period of 20 days, seven days a week (20 sessions).
Interventions
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active rTMS
The rTMS coil is applied tangentially to the head surface above the left DLPF (corresponding to position F3 of the international 10-20 system). For the stimulation intensity, the motor rest threshold of the patient is determined. The motor rest threshold is defined as the minimum intensity that triggers an EMG response with an amplitude\> 50 μV in the first right interosseus dorsalis muscle in at least 5 out of 10 cases. The stimulation intensity within the rTMS therapy is 80 percent of the motor rest threshold. In one session, 1,000 pulses are applied in 10 trains at a frequency of 10 Hz (1 train = 100 pulses in 10 s). Between the individual trains there is an inter-train interval of 28 seconds. The total duration of a session is 5:52 minutes. In total, the patient recieve 20 sessions.
sham rTMS
Patients in the intervetion group (active rTMS stimulation) receive active 10 Hz rTMS stimulation over the left dorsolateral prefrontal cortex (DLPFC) over a period of 20 days, seven days a week (20 sessions).
Eligibility Criteria
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Inclusion Criteria
* Post-stroke Depression (17 item version of the Hamilton Depression Rating Scale \[HAM-D\]\> 18 points)
* capacity to consent
Exclusion Criteria
* previous depression or previous use of antidepressants
* pre-stroke psychological illnesses (eg psychosis, bipolar disorder)
* severe cognitive impairment
* aphasia
* lefthanded
* decreased seizure threshold or history of epileptic seizures
* taking medicines that lower the seizure threshold (local anesthetics, cortisone, alcohol, neuroleptics)
* hemorrhages and cerebral edema (e.g., subarachnoid haemorrhage, intracerebral hemorrhage, subdural hematoma, epidural hematoma)
* fresh and healed head wounds near the area to be stimulated
* missing bone cover (relief spread)
* colonization with a germ requiring isolation (e.g., MRSA, 3MRGN, 4MRGN)
* recent myocardial infarction or higher grade cardiac arrhythmias
* contraindications to rTMS: Metallic or magnetic implants containing iron, cobalt or nickel (e.g., pacemakers, brain pacemakers, automatic insulin pumps, electrodes, plates, clips, implanted hearing aids, dental implants, metal endoprostheses, metal parts, or metal fragments in the body).
* pregnancy
* no consent for study participation by the patient
18 Years
ALL
No
Sponsors
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BDH-Klinik Hessisch Oldendorf
OTHER
Responsible Party
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Dr. rer. nat. Simone B. Schmidt
Postdoctoral Researcher
Locations
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Institute for rehabilitative Research, BDH-Clinic Hessich Oldendorf
Hessisch Oldendorf, Lower Saxony, Germany
Countries
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References
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Other Identifiers
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rTMS-PSD
Identifier Type: -
Identifier Source: org_study_id