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CHA2DS2-VASc Score

The CHA2DS2-VASc Score shows us the stroke risk for Atrial Fibrillation or Atrial Flutter patients within a year.

CHA2DS2-VASc Score


Congestive Heart Failure or Ejection Fraction ≤35%


Hypertension (High blood pressure)



Under 65 years


65 to 74 years


75 or more years


Diabetes Mellitus


Stroke, TIA or Systemic Thromboembolism History


Peripheral arterial disease, Myocardial Infarction or Aortic Plaque


Sex category: Female Sex (*It is only taken into account if there are other risk factors)


  • Stroke Risk

  • CHA2DS2-VASc Score of 0: Low Risk. May not require anticoagulation.
  • CHA2DS2-VASc Score of 1: Low-moderate Risk. Should consider Aspirin or Anticoagulation.
  • CHA2DS2-VASc Score of 2 or greater: Moderate-high Risk. Anticoagulation, except contraindications.

Are Oral Anticoagulation necessary?

Every patiente with Atrial Fibrillation or Atrial Flutter and CHA2DS2-VASc Score of 2 or greater should receive oral Anticoagulants, except for contraindications.

The decision of administering anticoagulants to the patient is irrespective of the type of Atrial Fibrillation suffered by the patient; both paroxysmal and permanent AF present the same stroke risk.

In patients with a CHA2DS2-VASc score of 1, anticoagulant or antiplatelet treatment could be administered; whereas in patients with no risk factors (CHA2DS2-VASc score of 0) anticoagulants are not recommended, antiplatelet treatment could be administered by doctor’s decision.

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