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Purpose and principlesIndications, selection and cautionsAssessment before treatmentTreatment approachComplications, monitoring and follow-upSpecial situationsCommon pitfallsQuestionsSources
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Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.

Electroconvulsive therapy indications and consent

Psychiatry · UK scope · Sources checked 7 Sept 2026 · Clinical review pending

RapidFull
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Severe illness may require rapid treatment

Life-threatening refusal of food or fluids, severe catatonia or a rapidly deteriorating depressive illness can require urgent specialist ECT assessment alongside medical stabilisation.

Action: Arrange senior psychiatric and acute medical assessment, support hydration and nutrition, assess suicide risk and seek the appropriate ECT and anaesthetic review while establishing lawful treatment authority.

Purpose and principles

Identify when electroconvulsive therapy offers a proportionate treatment option, explain benefits and cognitive risks clearly, and establish valid consent or the correct jurisdiction-specific legal authority before every treatment.

ECT is a specialist treatment in which brief electrical stimulation produces a controlled seizure under anaesthesia. It is most commonly considered in severe depression and is also an important treatment for catatonia or selected severe manic episodes. The decision rests on illness severity, urgency, previous response, alternatives and the person's preferences. A fixed number of unsuccessful antidepressant trials is not required when the illness is immediately life-threatening and a rapid response is needed.

The procedure includes anaesthetic induction, a muscle relaxant, oxygenation, electrical stimulation, seizure monitoring and supervised recovery. Electrode placement, pulse characteristics and stimulus dose are selected by the ECT team, balancing response and cognitive burden. Treatment is usually delivered as a course with repeated assessments rather than a single exposure. Its biological effects involve distributed neural and neurochemical changes; the precise mechanism is incompletely understood and should not be presented as simply resetting the brain.

Indications, selection and cautions

Severe depressive urgency

Marked nutritional compromise, psychotic depression, profound psychomotor retardation or severe suicidal risk may make the speed of response a central treatment consideration.

Catatonic illness

Stupor, mutism, rigidity, negativism or excited catatonia requires structured assessment, underlying-cause investigation and timely specialist treatment planning.

Previous treatment response

A clear history of beneficial ECT and the person's informed preference can influence selection without ignoring current risks or changed circumstances.

Consent complexity

Ambivalence, communication impairment, fluctuating cognition, coercion concerns or an advance refusal require careful assessment before treatment is scheduled.

Red flags requiring action

  • Dehydration, electrolyte disturbance, immobility, autonomic instability or inability to eat in severe depression or catatonia requires urgent medical care during ECT planning.
  • New prolonged confusion, focal neurological findings, prolonged seizure or cardiovascular instability after treatment needs prompt assessment rather than attribution to ordinary recovery.
  • A signed consent form does not authorise continuing ECT after a capable person withdraws consent; reassess the legal basis before any further treatment.

Assessment before treatment

  1. 01
    Psychiatric indication and baseline severityFirst step
    Why
    Define the target syndrome and provide a comparator for benefit.
    Interpretation and limitations
    Use a detailed clinical assessment and an appropriate severity measure; improvement in a score must correspond to meaningful changes such as eating, communicating or functioning.
  2. 02
    Anaesthetic and physical assessment
    Why
    Identify risks that alter preparation, setting or timing.
    Interpretation and limitations
    Review cardiovascular, respiratory, neurological and dental factors, observations and medicines; request ECG, bloods and additional tests according to clinical and anaesthetic findings.
  3. 03
    Baseline cognitive and memory assessment
    Why
    Record pretreatment function and personal memory concerns.
    Interpretation and limitations
    Combine a cognitive measure with the person's account; routine tests may miss autobiographical gaps that matter greatly to them.
  4. 04
    Consent and legal documentation review
    Why
    Confirm that proposed treatment has a valid current authority.
    Interpretation and limitations
    Check capacity, consent, applicable statutory forms, advance decisions and proxy or court powers; documentation must match ECT and associated treatment, not merely routine medication.

Treatment approach

01Treatment selectionBalance urgency, benefit and alternativesFirst stepSevere depression, catatonia or a qualifying manic illness prompts ECT consideration.+
  1. 1Establish the indication, previous treatment response and medical consequences of delaying effective treatment.
  2. 2Discuss ECT with the person using accessible information, covering cognitive risks and the alternatives that are realistic now.
  3. 3Arrange ECT specialist and anaesthetic assessment, with simultaneous treatment of dehydration, malnutrition and other acute problems.
02Consent safeguardsConfirm authority before treatmentA course is proposed, consent changes or capacity fluctuates during treatment.+
  1. 1Support the person to decide and document the decision-specific capacity assessment and freely given consent where present.
  2. 2

Complications, monitoring and follow-up

  • Monitor oxygenation, ECG, blood pressure and seizure activity during treatment and provide supervised recovery with reassessment of orientation and physiological stability.
  • Review clinical improvement and cognitive effects during the course; ask specifically about personally important memories as well as using formal measures.
  • The anaesthetic and psychiatric team should review lithium, benzodiazepines and anticonvulsants because they can affect delirium risk, seizure threshold or seizure quality; do not independently stop them without a plan.
  • For depression after ECT, continue or start relapse-prevention treatment in line with NG222, which may include an antidepressant and psychological intervention, with lithium augmentation considered where indicated.
  • Discuss transport, supervision after anaesthesia and driving restrictions; the treating team must relate advice to both ECT exposure and the underlying psychiatric condition.

Special situations

Detention does not settle consent

Being detained under mental health legislation does not remove capacity or automatically authorise ECT; the treatment-specific legal safeguards still apply.

Under-eighteen protection

ECT for a person under eighteen requires special independent safeguards even when the young person agrees; an adult consent pathway must not be copied.

Advance refusal is significant

A valid applicable advance decision refusing ECT has specific legal protection, so it must be actively sought and assessed rather than treated as an optional preference.

Memory concerns need follow-up

A patient can improve markedly in mood while experiencing significant autobiographical memory loss; both outcomes should be acknowledged in judging the treatment.

Common pitfalls

  1. 01

    Using the old TA59 depression wording while overlooking NG222's current treatment-selection recommendations.

  2. 02

    Assuming that a treatment-resistant illness is the only possible indication and delaying assessment when depression threatens life through absent intake.

  3. 03

    Describing all memory effects as short-lived or reassuring from a normal brief cognitive score alone.

  4. 04

    Equating a relative's agreement with legal authority to consent for an adult who lacks capacity.

  5. 05

    Continuing sessions after capacity returns without seeking the patient's own informed decision again.

Practice

Two practice questions

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PsychiatryOriginal SBA

Urgent depressive illness

An adult with severe psychotic depression has stopped drinking because of nihilistic beliefs and is becoming dehydrated. They have capacity and ask about treatments offering a rapid response. Which statement best reflects NICE guidance?

Choose one answer, then submit
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Sources and review status7 sources · checked 7 Sept 2026 · clinical review pending+
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Apply principles in context and verify current guidance when a decision affects care. Source check completed 7 Sept 2026; clinical approval remains outstanding.

  • NICE NG222 electroconvulsive therapyCurrent depression indications, consent and aftercare.
  • NICE TA59 ECT guidanceCatatonia and prolonged or severe mania recommendations.
  • Royal College of Psychiatrists ECT August 2026Procedure, cognitive effects and patient decision support.
  • CQC second opinion appointed doctor guidanceCapacity, refusal and ECT safeguards.
  • Mental Health Act 1983 section 58ATreatment-specific ECT consent protections.
  • Mental Health Act 1983 section 62Narrow urgent-treatment exceptions.
  • Mental Health Act 2025Amending legislation and staged commencement.

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateComplete draft
Consent must cover the reason for recommending ECT now, likely benefit, alternatives, risks of no treatment, anaesthetic risk and cognitive adverse effects. Discuss immediate disorientation, difficulty forming memories during the course and possible persistent gaps in memories of personal events. Baseline depression can itself affect cognition, but that does not justify dismissing new memory problems. Offer written accessible information, an opportunity to ask questions and involvement of a chosen supporter or advocate.

Assess whether the person can understand, retain, use or weigh relevant information and communicate a decision, with appropriate support. Capacity may change during recovery, so it must be reconsidered throughout the course. A person who regains capacity needs their own consent sought before further ECT. Staff must not imply that refusing ECT automatically means discharge, withdrawal of other care or loss of support.

The detailed legal route differs across the UK. In England and Wales, section 58A governs ECT for patients within its scope and includes special protection for people under eighteen. A capable adult's refusal prevents ordinary administration under that section. Where an adult lacks capacity, the required second-opinion certification and checks for a valid applicable advance refusal or authorised proxy/court decision are essential. Urgent-treatment exceptions are narrow and require senior legal and clinical scrutiny. The Mental Health Act 2025 is implemented in stages; Royal Assent alone does not activate every amended treatment power.

Key points

  • For severe depression, NICE supports considering ECT when the person prefers it based on previous experience, a rapid response is needed, or other treatments have failed.
  • TA59 remains relevant to catatonia and prolonged or severe mania; its depression recommendations have been replaced by NG222.
  • ECT uses a controlled seizure under general anaesthesia with muscle relaxation and physiological monitoring.
  • Explain short-term confusion and memory effects, including the possibility of persistent autobiographical memory loss, alongside expected benefit and alternatives.
  • Assess capacity for the ECT decision specifically and provide practicable communication support; diagnosis or detention alone does not establish incapacity.
  • In England and Wales ECT has specific Mental Health Act safeguards under section 58A; ordinary medication authority is insufficient.
  • After a successful acute course, arrange relapse-prevention treatment and cognitive follow-up rather than treating the final session as the end of care.
If consent is absent, identify the exact jurisdiction and statutory route, obtaining required independent certification and checking advance refusals or authorised decisions.
  • 3Seek senior Mental Health Act and legal advice for urgent exceptions or uncertainty, and recheck authority before each treatment rather than relying on an old form.
    • 03Course reviewContinue only while proportionateThe patient is receiving a course of ECT or reaches the intended treatment endpoint.+
    1. 1Assess clinical response and cognitive adverse effects repeatedly, including the person's own account and any new physical risk.
    2. 2Adjust or stop treatment when adequate improvement is achieved, harms outweigh benefit or the legal authority no longer supports continuing.
    3. 3Agree pharmacological and psychological relapse prevention, outpatient support and a plan for persistent memory concerns after the course.
    Clinical stateAwaiting review
    JurisdictionUnited Kingdom