A recent study has uncovered a concerning link between atrial fibrillation and dementia risk in younger adults. The findings, presented at the European Heart Rhythm Association 2025 conference, suggest that individuals under 70 with atrial fibrillation face a significantly higher risk of developing dementia.
Atrial fibrillation, a common heart rhythm disorder characterized by irregular and rapid contractions of the heart’s upper chambers, can lead to various complications. While it’s known to increase the risk of stroke, this new research sheds light on its potential cognitive impacts.
The study, conducted in Spain’s Catalonia region, analyzed data from over 2,370,776 individuals. Researchers examined demographic records, medical codes, diagnostic test results, and prescription data over an average follow-up period of 13 years. Initially, the results showed a markedly higher incidence of dementia among those with atrial fibrillation. However, after adjusting for various factors, the overall impact of atrial fibrillation on dementia risk was found to be modest.
Interestingly, the study revealed a notable age-related trend. For individuals over 70, atrial fibrillation did not significantly increase dementia risk.
However, in those under 70, it emerged as an independent risk factor, boosting dementia risk by 21% and early-onset dementia risk by a substantial 36%. These findings underscore the importance of early detection and management of atrial fibrillation, particularly in younger adults.
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