Q. A 65-year-old woman with a history of hypertension, hyperlipidemia, and smoking comes to the cardiology department. She reports experiencing shortness of breath, particularly when lying flat, and ankle swelling for the past two weeks. She is currently taking aspirin 81 mg and atorvastatin 40 mg daily. On physical examination, she appears mildly dyspneic even at rest, and the physician notice pitting edema in her ankles. Her lung sounds reveal bilateral rales. An EKG shows no acute ischemic changes, and a B-type natriuretic peptide (BNP) test shows a level of 580 pg/mL. What is the most appropriate next step in the management of this patient?