Harvard Heart Letter

How atrial fibrillation may affect your brain

This heart rhythm disorder is linked to thinking and memory problems. But anti-clotting drugs may lower the risk. Bouts of atrial fibrillation, or afib — a rapid, chaotic heartbeat — make some people feel lightheaded and dizzy, while others don’t notice any symptoms. But the most serious threat of this condition is the higher risk of stroke among people with afib compared with those without the disorder (see “Blood clot dangers, large…

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