Electroconvulsive Therapy Does Not Increase The Risk Of Dementia In Patients With Affective Disorders

Researchers in Denmark conducted a large study to examine whether electroconvulsive therapy (ECT) - a medical treatment that uses electrical currents to trigger brief seizures in the brain - increases the risk of dementia in people with depression and other mood disorders. This question was important because some smaller, earlier studies had suggested there might be a connection, causing concern among patients and doctors about ECT's long-term safety for brain health.

The study followed nearly 170,000 people who had been treated for depression over a 10-year period, with an average follow-up time of 5 years. Of these patients, about 6,000 received ECT treatment. The researchers tracked who developed dementia by looking at hospital records and prescriptions for dementia medications. They found that 3.6% of patients who received ECT developed dementia, compared to 3.1% of those who didn't receive ECT - a difference that was not statistically significant.

Interestingly, the study found that in patients aged 70 and older who received more than 10 ECT sessions, there was actually a lower rate of dementia development. This suggests that not only is ECT safe for long-term brain health, but it might even provide some protective benefits, possibly by effectively treating severe depression which itself can increase dementia risk.

For patients considering ECT or concerned about brain health and cognitive longevity, this research provides reassuring evidence. In clinical practice at VALIA Health, this data supports informed decision-making about ECT as a safe treatment option for severe depression, particularly for older patients where both mental health treatment and cognitive preservation are priorities.