8, A 68-year-old African American woman is admitted to the hospital for new onset acute decompensated heart failure. Her current medications include felodipine 2.5 mg Qday and atorvastatin 20 mg Qday. Hemodynamic readings include a PCWP of 16 (2.1 kPa) and a CI of 1.8 L/min/m2 . Which of the following is the MOST appropriate treatment plan?