INR, or International Normalised Ratio, is a standardized measure of blood coagulation that assesses the time it takes for blood to clot, specifically in patients on anticoagulant therapy such as warfarin. It is crucial in clinical practice for monitoring anticoagulation levels to prevent thromboembolic events while minimising the risk of bleeding. A key association is the management of atrial fibrillation, where maintaining an INR between 2.0 and 3.0 is vital for effective treatment.
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