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* '''[[Atrial fibrillation]]''' (AFib): This is the most common type of serious arrhythmia. It's a very fast, irr * '''[[Atrial flutter]]''': This is similar to AFib but the rhythm in your atria is more organized and less chaotic than the ab

...used to reduce the risk of stroke in people with [[atrial fibrillation]] (AFib) that is not caused by a heart valve problem.