Cardiology

SAMe-TT₂R₂ Score

Predicts anticoagulation control on warfarin.

Education and reference only. Not a substitute for clinical judgement, local policy or product labelling. Always verify before clinical use. Values are calculated in your browser and never stored.

When to use

Use in atrial fibrillation to predict whether a patient will achieve good INR control on a vitamin-K antagonist, helping choose VKA vs DOAC.

Why use

A higher score predicts poorer time-in-therapeutic-range and may favour a DOAC.

Evidence & references

  1. Apostolakis S et al. Factors affecting quality of anticoagulation control: the SAMe-TT2R2 score. Chest. 2013.

Related calculators

CHA₂DS₂-VASc ScoreStroke risk in atrial fibrillation, guiding anticoagulation.HAS-BLED ScoreMajor bleeding risk on anticoagulation in atrial fibrillation.

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