CHADS2 Score


The CHADS2 Score is a clinical prediction tool used to assess the risk of stroke in patients with atrial fibrillation (AF), a common heart rhythm disorder. It helps healthcare professionals determine the necessity and intensity of anticoagulation therapy to prevent stroke. The acronym “CHADS2” represents five key risk factors: Congestive heart failure, Hypertension, Age (≥75 years), Diabetes mellitus, and previous Stroke or transient ischemic attack (TIA). Each risk factor is assigned one point, except for a history of stroke or TIA, which is given two points due to its strong association with future stroke risk.

The CHADS2 Score is calculated by summing the points assigned to each risk factor, yielding a total score ranging from 0 to 6. A score of 0 indicates a low risk of stroke, typically suggesting that no or minimal anticoagulation therapy is needed. A score of 1 represents moderate risk, often leading to a discussion about anticoagulation versus aspirin therapy. A score of 2 or higher denotes a high risk of stroke, warranting more aggressive anticoagulation measures. This scoring system simplifies risk stratification, providing clinicians with a quick and effective means of identifying patients who would benefit from anticoagulant medications like warfarin or direct oral anticoagulants (DOACs).

The CHADS2 Score has significantly improved stroke prevention strategies in patients with atrial fibrillation. By offering a standardized approach to evaluating stroke risk, it enables healthcare professionals to make informed decisions about anticoagulant therapy, balancing the benefits of stroke prevention against the risks of bleeding. It also serves as an educational tool, helping patients understand their individual risk factors and the importance of adhering to prescribed treatment plans. Moreover, its simplicity and ease of use have made it a valuable resource in both primary care and specialist settings, improving patient outcomes and reducing the incidence of stroke-related complications in atrial fibrillation patients worldwide.

CHADS2 Score Calculator

CHADS2 Score Calculator