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CHA₂DS₂-VASc Score for Atrial Fibrillation Stroke Risk

Calculates stroke risk for patients with atrial fibrillation, possibly better than the CHADS2 score.

Critical Actions

One recommendation suggests a 0 score is “low” risk and may not require anticoagulation; a 1 score is “low-moderate” risk and should consider antiplatelet or anticoagulation, and score 2 or greater is “moderate-high” risk and should otherwise be an anticoagulation candidate.

  • Consider not starting anticoagulation in patients with non-valvular AF and a CHA2DS2-VASc score of 0 as these patients had no TE events in the original study.
  • For those patients in whom anticoagulation is considered, risk bleeding scores such as ATRIA can be used to determine the risk for warfarin-associated hemorrhage.
  • Carefully consider all the risks and benefits prior to initiating anticoagulation in patients with non-valvular AF.
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