This study looks at how Electroconvulsive Therapy (ECT) combined with usual care (ECT+UC) can help reduce severe agitation in people with moderate to severe dementia. Dementia is a condition that affects memory and thinking skills, including types like Alzheimer's Disease. ECT is a medical treatment where small electric currents are passed through the brain to help improve mental health conditions. The study will check if ECT is safe and effective for dementia patients.

Participants will be part of a single group trial, meaning everyone gets the same treatment, and it won't be random. Around 50 people will start with at least one ECT treatment, then follow-up for 12 months. To join, patients must have a dementia diagnosis, show signs of severe agitation, and have tried other treatments without success.

• The study lasts about 12 months with follow-up checks.
• Participants will receive ECT treatment to manage agitation.
• Safety and effectiveness of ECT will be closely monitored.