How effective is electroconvulsive therapy (ECT) in treating depression?

Answer from top 1 papers

Electroconvulsive therapy (ECT) has been demonstrated to be highly effective in treating severe depression, particularly in cases where other treatments, including pharmacotherapy, have failed. It stands out as an effective intervention for treatment-resistant depression, showing significant clinical improvement among patients (Trifu et al., 2021).
ECT is also noted for its effectiveness in older adults with major depressive disorder, boasting high response rates and favorable safety profiles compared to antidepressant monotherapies . However, its use has waned over time in some regions like the UK, where it is mainly reserved for severely treatment-resistant cases. Despite this, studies continue to show that more than half of the patients achieve remission, confirming its efficacy in challenging clinical scenarios .
In terms of physiological impact, ECT induces significant structural-functional brain changes, including increased gray matter volume and enhanced functional connectivity, which may facilitate neurogenesis in the amygdala—a key area involved in mood regulation . These changes are thought to contribute to its efficacy in reducing depressive symptoms, although the precise mechanisms remain further exploration .
Moreover, ECT remains an effective strategy for managing mixed affective states and conditions related to major depressive disorder, bipolar disorder, and catatonic features, with a substantial proportion of patients showing marked improvement .
While ECT can lead to cognitive side effects, these are an important consideration when choosing the treatment modality. Brief pulse ECT is observed to be more efficacious but with higher cognitive side effects compared to ultrabrief pulse ECT, suggesting that the decision between these should weigh the priorities of efficacy versus cognitive preservation .
In summary, ECT remains a valuable option for severe and treatment-resistant depression, often achieving substantial clinical improvements where other methods fall short, although careful consideration of its cognitive impact is essential (Trifu et al., 2021).

Source Papers

54
10.3892/etm.2021.10716

Efficacy of electroconvulsive therapy as a potential first-choice treatment in treatment-resistant depression (Review)

Sep 09, 2021
Experimental and Therapeutic Medicine
Simona Trifu + 4 more +4

Electroconvulsive therapy (ECT) is a technique that has been used since 1938 to treat several psychiatric disorders as a replacement for chemically induced seizures. Despite its history of stigma, controversy and low accessibility, ECT is found to be beneficial and efficient in severe cases of depression where medication fails to bring results. Titration tables developed over time, based on evidenced-based medicine, have made this treatment technique safe and, in some cases, the first choice of treatment. The aim of the review was to summarize the research conducted on the efficacy of ECT on major depressive disorder and variables studied such as technique, comorbidities and medication as well as the effects and outcomes of this procedure. At the same time, the application and correlations with other psychiatric and neurological disorders, including catatonia, agitation and aggression in individuals with dementia, schizophrenia, and epilepsy were assessed. There are no statistically demonstrated effects due to the fact that a small number of moderate-quality studies have been published; however, the combination of ECT technique with standard medication and care, can improve patient outcome. Furthermore, with regard to ECT, widespread and robust volume changes in both cortical and subcortical regions have been shown. Antidepressant response and volumetric increases appear to be limited by the specific neuroplasticity threshold of each patient.