50 Hz vs. 25 Hz Magnetic Seizure Therapy for Schizophrenia

Shanghai Mental Health Center

Status: Completed

Conditions: Schizophrenia

Treatments: Procedure: 25 Hz magnetic seizure therapy; Procedure: 50 Hz magnetic seizure therapy

Study type: Interventional

Funder types: Other

Identifiers

NCT03003156

SHDC12014111a

Details and patient eligibility

About

This trial attempts to investigate whether the dosage (frequency) has an effect on the treatment efficacy and cognitive outcomes of magnetic seizure therapy (MST) among schizophrenia patients. Half of the participants will be recruited to receive 25 Hz MST, while the other half will be recruited to 50 Hz MST.

Full description

Magnetic seizure therapy (MST) is likely to be an alternative options to electroconvulsive therapy (ECT).Widespread stimulation of cortical and subcortical regions is inevitable for ECT since the substantial impedance of the scalp and skull shuts most of the electrical stimulus away from the brain. Nevertheless, magnetic pulses are capable to focus the stimulus to a specific area of the brain because they can pass the scalp and skull without resistance. In Addition, electric current will penetrate into deeper structures, while magnetic stimulus are only capable to reach a depth of a few centimeters. As a consequence, MST are able to generate focus stimuli on superficial regions of the cortex while ECT can't, which may give MST the capability to produce comparable therapeutic benefits with the absence of apparent cognitive side effects. Though high dose (frequency) MST is gaining popularity, there is no evidences supporting its superiority over low dose (frequency) MST either on efficacy, safety, or seizure quality.

Enrollment: 18 patients

Sex: All

Ages: 18 to 55 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. DSM-5 diagnosis of schizophrenia;
2. convulsive therapy clinically indicated, such as severe psychomotor excitement or retardation, attempts of suicide, being highly aggressive, pharmacotherapy intolerance, and ineffectiveness of antipsychotics;
3. the positive and negative syndrome scale (PANSS)[20] score ≥ 60;
4. informed consent in written form.

Exclusion criteria

1. diagnosis of other mental disorders;
2. severe physical diseases, such as stroke, heart failure, liver failure, neoplasm, and immune deficiency;
3. present with a laboratory abnormality that could impact on efficacy of treatments or safety of participants;
4. failure to respond to an adequate trial of ECT lifetime;
5. are pregnant or intend to get pregnant during the study;
6. other conditions that investigators consider to be inappropriate to participate in this trial.

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

18 participants in 2 patient groups

25 Hz magnetic seizure therapy

Experimental group

Description:

10 treatment sessions of 25 Hz MST, three times per week in the first two weeks, two times per in the following two weeks.

Treatment:

Procedure: 25 Hz magnetic seizure therapy

50 Hz magnetic seizure therapy

Experimental group

Description:

10 treatment sessions of 50 Hz MST, three times per week in the first two weeks, two times per in the following two weeks.

Treatment:

Procedure: 50 Hz magnetic seizure therapy