Electroconvulsive Therapy (ECT) is a medical treatment that sends small electric currents through the brain to help with certain mental illnesses. This study wants to see if ECT, along with usual care (ECT+UC), can help reduce severe agitation (restlessness) in people with moderate to severe dementia. Dementia is a condition where memory and thinking skills worsen over time. This includes types like Alzheimer's Disease, Vascular dementia, Frontotemporal dementia, and Dementia with Lewy Bodies. The study also checks if ECT+UC is safe for patients.

This research will have 50 participants, and each will receive at least one ECT session. After treatment, participants will be followed for up to 12 months to see how they do over time. The study is not randomized, meaning everyone gets the same treatment, and it is unblinded, so both doctors and patients know they're getting ECT.

• The study lasts for about 12 months with regular follow-ups.
• Participants must be at least 40 years old and have a legal representative to consent.
• Compensation for participating is not mentioned.