A-fib is an arrhythmia in the upper chamber of the heart that can cause blood to coagulate there.
"That sort of stagnation of blood, if patients aren’t treated with anticoagulants or blood thinners, can cause a clot that eventually is lodged and goes into the vascular system," explained Dr. Andrea Natale, an electrophysiologist and the executive medical director of the. "And, most of the time, it goes into the brain and causes stroke. When we see atrial fibrillation, we always worry about making sure that the patient is properly treated.
"What we tell people is don’t ignore when something is wrong," said Dr. Natale. "See a doctor, because it’s not that obvious that you’re in atrial fibrillation. Not everybody feels like their heart is flopping around, or their heart is beating faster. That’s a minority of people who feel that." Dr. Natale said statistically, in the western world, 1 out of 4 people will develop a-fib by the age of 40, though it’s more common between the ages of 50 and 60. He noted there is a genetic predisposition.
As for the possible link between a-fib and dementia, when looking at MRI images of the brain, blood flow is diminished during episodes of a-fib, increasing the risk.
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