See also:
     Anticoagulation
Provides guidance for anticoagulation of patient with atrial fibrillation
Criterion     Points
CHF               1
HTN               1
Age >=75       1
DM                1
Prior stroke     2

Interpretation
     Total points
          0          Low risk                    Treat with aspirin*

          1-2      Intermediate risk       Aspirin or Warfarin

          >2       High risk                    Treat with warfarin

*Lone atrial fibrillation is atrial fibrillation in the absence of other risk factors for stroke. Aspirin is the only antithrombotic therapy required for patient with lone atrial fibrillation. If a patient with lone atrial fibrillation is asymptomatic and has no tachycardia, then aspirin is all the patient needs. Rate control is unnecessary.

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