Final answer:
The nurse would expect to administer Warfarin (Coumadin) to prevent a common complication of chronic atrial fibrillation.
Step-by-step explanation:
The nurse would expect to administer Warfarin (Coumadin) to prevent a common complication of chronic atrial fibrillation. Warfarin is an anticoagulant medication that helps to prevent blood clots from forming in the heart and blood vessels. It is commonly prescribed for patients with atrial fibrillation to reduce the risk of stroke or other blood clotting complications.