Review Question - QID 212673

A 65-year-old man who is not regularly followed by a primary care physician presents to the emergency department with a strange sensation in his chest. He states that he gets this sensation at times, but that it normally resolves on its own. This time, his symptoms have persisted for the past 12 hours, prompting him to come to the ED. The patient has a past medical history of diabetes, hypertension, and a 20 pack-year smoking history. He is prescribed medications for these conditions but has never filled his prescriptions. His temperature is 97.5°F (36.4°C), blood pressure is 113/55 mmHg, pulse is 150/min, respirations are 18/min, and oxygen saturation is 99% on room air. An electrocardiogram (ECG) is performed as seen in Figure A. The patient has his heart rate appropriately controlled and is admitted to the medicine floor. Upon discharge, which of the following is the most appropriate anticoagulation for this patient?