Irregular heartbeat increases risk of dementia – study

Irregular heartbeat increases risk of dementia – study

- in Health, News

An irregular heartbeat may increase a person’s risk of developing dementia, warns new research.

The study shows that people with a particular kind of irregular heartbeat called atrial fibrillation may experience a faster decline in thinking and memory skills, and have a greater risk of dementia than those without the condition.

With atrial fibrillation, a form of arrhythmia, the heart’s normal rhythm is out of sync.

As a result, blood may pool in the heart, possibly forming clots that may go to the brain, causing a stroke.

The good news from the study is that people with atrial fibrillation who were taking anticoagulants, or blood thinners, to keep their blood from clotting were actually less likely to develop dementia than those who did not take blood thinners.

Study author Dr Chengxuan Qiu, of the Karolinska Institute and Stockholm University in Sweden, said: “Compromised blood flow caused by atrial fibrillation may affect the brain in a number of ways.

“We know as people age, the chance of developing atrial fibrillation increases, as does the chance of developing dementia.

“Our research showed a clear link between the two and found that taking blood thinners may actually decrease the risk of dementia.”

For the study, researchers looked at figures from 2,685 participants with an average age of 73 who were followed as part of a larger study.

The participants were examined and interviewed at the start of the study, and then once after six years for those younger than 78 and once every three years for those 78 and older.

All the participants were free of dementia at the start of the study, but 243 people (nine per cent) had atrial fibrillation.

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