Risk calculators

With more than one anticoagulant to choose from, stroke and bleeding risk assessment will become increasingly important. Here you will find validated, interactive tools to help you categorize risk. Click on an assessment tool to learn more and calculate risk.

CHADS2

Stroke Risk Index

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CHA2DS2-VASc

Stroke Risk Index

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ATRIA

Bleeding Risk Index

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HAS-BLED

Bleeding Risk Index

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The information provided here, including the CHADS2, CHA2DS2-VASc, ATRIA and HAS-BLED models for stroke and bleeding risk assessment, is not intended to provide medical advice or medical diagnosis. There are limitations to these models, including that the risk calculation and output of the models are based on the data that are input into the models and not on other factors. Only a trained medical professional can assess the potential benefits and risks of any course of treatment for an individual patient.

Risk assessment

Risk assessment

Here you can find validated, interactive tools to help you calculate stroke and bleeding risk of your patients

About the Coagulation Center

The Coagulation Center is an educational resource for healthcare professionals. Guided by a global editorial board of experts, the Coagulation Center offers a range of clinical perspectives on balancing the benefit and risk of anticoagulation in a rapidly changing landscape. Within the Coagulation Center you will find roundtable discussions on anticoagulation management, materials for patient management including patient case studies, tools to help evaluate bleeding risk and stroke risk, and downloadable resources for your practice.