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
In a patient post myocardial infarction developed arrial fibrillation. Subsequently the ECHO showed a mural thrombus. The management is by 
Select and explain. 
A. Warfarin, B. Cardioversion, C. Digoxin, D. Propranolol
A: Warfarin
Answer: A: Warfarin 
Explanation: (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.