HAS-BLED Score for Major Bleeding Risk
The HAS-BLED Score for Major Bleeding Risk calculates the bleeding risk for patients with atrial fibrillation.
Research authors: Ron Pisters, Deirdre A. Lane, Robby Nieuwlaat, Cees B. de Vos, Harry J.G.M. Crijns, Gregory Y.H. Lip
Version: 3.22
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The HAS-BLED score is a simple and practical tool to assess the bleeding risk in patients with atrial fibrillation. Even though the tool may support decision involving the initiation of anticoagulant treatment, a high bleeding risk alone should not immediately lead to withholding anticoagulation. 

The HAS-BLED score has been validated and compared with other similar tools. On discrimination, the HAS-BLED performs poorly to moderately (C-index 0.58 - 0.72).

The HAS-BLED tool can be used together with tools to predict stroke risk and or together with other bleeding risk assessment tools. 

Out of the 3071 patients used to develop the HAS-BLED score, a total of 48 patients suffered from bleeding, corresponding to 1.56 bleeds per 100 patient-years.


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