A 64-year-old man with ischemic cardiomyopathy (LVEF 25%) pr…

A 64-year-old man with ischemic cardiomyopathy (LVEF 25%) presents with dyspnea on exertion and peripheral edema. He is initiated on lisinopril, carvedilol, and spironolactone, consistent with guideline-directed medical therapy for HFrEF. Which additional medication would be expected to improve symptoms of volume overload but is not associated with a reduction in mortality?