title: Do all patients with mechanical heart valve prostheses need anticoagulant therapy?
mesh_terms: D000925:Anticoagulants / Q000627:therapeutic use*; D001241:Aspirin / Q000627:therapeutic use; D001281:Atrial Fibrillation / Q000517:prevention & control; D001705:Bioprosthesis; D004176:Dipyridamole / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D005343:Fibrinolytic Agents / Q000627:therapeutic use; D006349:Heart Valve Diseases / Q000601:surgery*; D006350:Heart Valve Prosthesis; D006801:Humans; D010974:Platelet Aggregation / Q000187:drug effects; D011183:Postoperative Complications / Q000517:prevention & control*; D011474:Prosthesis Design; D013923:Thromboembolism / Q000517:prevention & control*
chemical_list: D000925:Anticoagulants; D005343:Fibrinolytic Agents; D004176:Dipyridamole; D001241:Aspirin