Homer is a 58-year-old male Caucasian who farms in the community. He seeks treatment in the clinic today for complaints of weakness and dizziness. Homer states that for the past two weeks he has not had any pep and that he feels too tired to finish chores. His past history includes COPD and hypertension. He admits to a forty-year history of smoking cigarettes and continues to smoke. Homer denies chest pain or shortness of breath. Homer has brought his current medications with him, which include: ASA 81 mg daily, Hydrochlorothiazide 50 mg daily. Homer denies any allergies to medications. Share your thoughts on possible reasons for Homer's weakness. What information would be important to gather from this patient? What tests or procedures might his provider believe would be important to perform?