Irregular heart can lead to Alzheimer's?

Researchers in Utah looked at 37,000 people, and found those with atrial fibrillation were 44 percent more likely to develop dementia over a five-year period than people without the disorder.

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The association is especially strong for people under the age of 70.

Those with an abnormal heartbeat were 130 percent more likely to develop Alzheimer's.

Scientists are now looking at possible explanations for the relationship, which they say could ultimately lead to early treatment and prevention.

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