Warfarin and elderly patients: a challenging combination
Atrial fibrillation (AF) incidence increases according to patient age.
Oral anticoagulant therapy with vitamin K antagonists, like warfarin, reduces stroke risk in AF patients, including elderly.[1,2] The INR (International Normalized Ratio) normal range for atrial fibrillation lays between 2 and 3.[3] Increased risk for thromboembolism[4] is associated with INR4.[5] Unfortunately, to keep INR values between 2 and 3 is challenging in daily clinic practice.