Calculate stroke and bleeding risk scores for atrial fibrillation.
Age contributes two points from 75 and one from 65, and prior stroke contributes two. HAS-BLED is intended to prompt correction of modifiable bleeding risks rather than to rule out anticoagulation. A high HAS-BLED score is not a reason to withhold anticoagulation, since absolute stroke reduction usually exceeds absolute bleeding increase in those at high stroke risk.
CHA2DS2-VASc / HAS-BLED
CHA2DS2-VASc sums weighted risk factors; HAS-BLED sums bleeding risk factors
This reproduces a published formula for educational and reference use only. It is not a diagnostic tool, does not account for individual clinical context, and must not be used to make or change treatment decisions. Clinical assessment by a qualified healthcare professional is always required. Anticoagulation decisions require full clinical assessment and shared decision making with a qualified clinician. Do not start, stop or change anticoagulant medication based on any score.
CHA2DS2-VASc sums weighted risk factors; HAS-BLED sums bleeding risk factors Age contributes two points from 75 and one from 65, and prior stroke contributes two. HAS-BLED is intended to prompt correction of modifiable bleeding risks rather than to rule out anticoagulation.
A high HAS-BLED score is not a reason to withhold anticoagulation, since absolute stroke reduction usually exceeds absolute bleeding increase in those at high stroke risk.
This calculator takes 5 inputs: Age, Sex, CHA2DS2-VASc risk factors present besides age and sex, Prior stroke, TIA or thromboembolism, HAS-BLED factors present. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.