TMS vs ECT: what they are and when each makes sense

When medications and therapy have not been enough for depression, two brain stimulation treatments come up: TMS and ECT. Patients ask me which is right. Here is how I explain them.

TMS, transcranial magnetic stimulation, uses magnetic pulses through a coil on your scalp to stimulate brain areas involved in mood. You are awake, no anesthesia, no seizure. Sessions run about five days a week for four to six weeks. A large multisite trial showed TMS effective for major depression that had not responded to medication.

ECT, electroconvulsive therapy, is done under brief anesthesia with muscle relaxation. A controlled electrical current briefly triggers a seizure, which resets brain chemistry in ways we are still studying. It sounds scary and the movies did it no favors. In reality a major review found ECT more effective than medication for severe depression. It is often the fastest option when someone is not eating, is psychotic, or is at high suicide risk.

Benefits and risks: TMS has few side effects, mostly scalp discomfort or headache, and no memory effects. It takes weeks and works best for moderate treatment resistant depression. ECT works faster and for more severe illness, but can cause short term memory gaps around the treatment period, plus the risks of anesthesia.

When each is considered: TMS is usually tried when one or more medication trials have failed and the patient can commit to daily visits. ECT is considered when depression is severe, urgent, or has not responded to multiple treatments, or when a patient cannot tolerate medications.

Neither is a first step and neither is done alone. Both pair with ongoing care and planning for what comes after. If you are wondering which fits, that is a conversation for you, your psychiatrist and your family, not a quiz result.

Anthony

Sources: O'Reardon JP et al., Biological Psychiatry (2007), multisite trial of TMS in major depression. UK ECT Review Group, The Lancet (2003), efficacy and safety of ECT in depressive disorders.