Use the CHADS2 score.
C: CCF (1 point)
H: Hypertension (BP consistently above 140/90 mmHg or treated hypertension) (1 point)
A: Age 75 years old and above (1 point)
D: Diabetes Mellitus (1 point)
S2: Stroke or TIA or thromboembolism
1 point each except for S (2 points). Total up the score:
If 0 points, use aspirin
If 1 point, use aspirin or warfarin
If >1 points, use warfarin
Recently the CHADS2 score has been updated to CHA2DS2-VASc
C: CCF (1 point)
H: Hypertension (BP consistently above 140/90 mmHg or treated hypertension) (1 point)
A2: Age 75 years old and above (2 points)
D: Diabetes Mellitus (1 point)
S2: Stroke or TIA or thromboembolism (2 points)
V: Vascular disease (1 point)
A: Age 65 to 74 years old (1 point)
Sc: Sex category - Female sex (1 point)
Similarly, total up the score:
If 0 points, use aspirin
If 1 point, use aspirin or warfarin
If >1 points, use warfarin
C: CCF (1 point)
H: Hypertension (BP consistently above 140/90 mmHg or treated hypertension) (1 point)
A: Age 75 years old and above (1 point)
D: Diabetes Mellitus (1 point)
S2: Stroke or TIA or thromboembolism
1 point each except for S (2 points). Total up the score:
If 0 points, use aspirin
If 1 point, use aspirin or warfarin
If >1 points, use warfarin
Recently the CHADS2 score has been updated to CHA2DS2-VASc
C: CCF (1 point)
H: Hypertension (BP consistently above 140/90 mmHg or treated hypertension) (1 point)
A2: Age 75 years old and above (2 points)
D: Diabetes Mellitus (1 point)
S2: Stroke or TIA or thromboembolism (2 points)
V: Vascular disease (1 point)
A: Age 65 to 74 years old (1 point)
Sc: Sex category - Female sex (1 point)
Similarly, total up the score:
If 0 points, use aspirin
If 1 point, use aspirin or warfarin
If >1 points, use warfarin