Transient ischemic attacks linked to higher dementia risk

A study published in the medical journal Neurology® indicates that transient ischemic attacks (TIAs) are associated with an increased risk of developing dementia. A TIA occurs when blood flow to a portion of the brain is temporarily interrupted, causing stroke-like symptoms that resolve within a day without visible damage on brain scans.

Researchers analyzed two decades of health data from 113,081 individuals in Ontario, Canada, with an average age of 70. Over an average follow-up period of seven years, approximately one in five people who experienced a TIA developed dementia. The study found that individuals with a TIA had a 34% higher risk of dementia compared to those who did not experience one.

While the study demonstrates an association, it does not prove that TIAs cause dementia. The findings suggest that medical prevention strategies following a TIA should expand beyond stroke prevention to include efforts aimed at reducing dementia risk. The risk of developing dementia appeared to be highest during the first year following the TIA.