Atrial fibrillation (also known as AF or AFib) is the most common type of arrhythmia (irregular heartbeat or heart rhythm). The most common symptom of AF is heart palpitations (an irregular and rapid heartbeat, typically experienced as a rapid thumping in the chest). Atrial fibrillation increases your risk for stroke.

If you have been diagnosed with atrial fibrillation, you can use this tool to calculate your annual risk of stroke. Answer the questions below and click "Calculate."

This tool is intended for people who have been diagnosed with atrial fibrillation. It uses a formula developed by experts in atrial fibrillation and is based on the CHADS2 index for stroke assessment.



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  No Yes
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  No Yes
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  No Yes
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  No Yes
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  No Yes
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  I'm not taking any blood thinners
ASA (acetylsalicylic acid)
warfarin
 
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