Final answer:
The long-term anticoagulant therapy for a patient with valvular heart disease and chronic atrial fibrillation includes Warfarin sodium (Coumadin).
Step-by-step explanation:
The long-term anticoagulant therapy for a patient with valvular heart disease and chronic atrial fibrillation includes the drug Warfarin sodium (Coumadin).
Warfarin is a vitamin K antagonist that inhibits the synthesis of clotting factors in the liver. It is commonly used to prevent the formation of blood clots in patients with valvular heart disease and atrial fibrillation.
Other anticoagulant options include Rivaroxaban (Xarelto), Dabigatran (Pradaxa), and Apixaban (Eliquis), but Warfarin is the recommended drug for long-term therapy in this specific patient population.