title: My atrial fibrillation has returned after five years. Why? What should I do?
mesh_terms: D000925:Anticoagulants / Q000627:therapeutic use; D001281:Atrial Fibrillation / Q000150:complications / Q000628:therapy*; D006801:Humans; D012008:Recurrence; D020521:Stroke / Q000517:prevention & control
chemical_list: D000925:Anticoagulants