This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
[{'content': 'In a patient post myocardial infarction developed arrial fibrillation. Subsequently the ECHO showed a mural thrombus. The management is by \nSelect and explain. \nA. Warfarin, B. Cardioversion, C. Digoxin, D. Propranolol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Warfarin # Patients with an anterior location of the infarction, severe LV dysfunction, CHF, a history of embolism, two-dimensional echocardiographic evidence of mural thrombus, or atrial fibrillation are at increased risk of systemic or pulmonary thromboembciism.> Such individuals should receive full therapeutic levels of antithrombin therapy (UFH or LMWHs) while hospitalized, followed by at least 3 months of warfarin therapy.', 'role': 'assistant'}]