A 70-year-old with CHA₂DS₂-VASc 4 on warfarin has labile INRs and no mechanical valve. Best strategy?...

Question

A 70-year-old with CHA₂DS₂-VASc 4 on warfarin has labile INRs and no mechanical valve. Best strategy?

Accepted Answer

Switch to DOAC (e.g., apixaban)

Answer

Continue warfarin with same dose

Answer

Stop anticoagulation due to labile INRs

Answer

Add aspirin 81 mg to warfarin

Answer

Switch to low-dose warfarin (INR target 1.5-2.0)

us-abim MCQ (SBA): AF-Switching to DOAC