Harvard Heart Letter

Stroke risk when you have atrial fibrillation

Atrial fibrillation (afib) is among the most common heart rhythm irregularities. During a bout of afib, blood can stagnate and form clots, which can travel to the brain. More than one in six ischemic strokes can be traced to atrial fibrillation. Because effectively detecting and treating afib could avert many strokes, doctors have devised an improved scoring system to identify people with afib who are at high stroke risk. In addition, newer anticoagulant drugs offer safer and more convenient stroke protection for more people.
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