We plan on enrolling 27 patients in a prospective, randomized, double-blinded, placebo-controlled, crossover study. At study start, participants will be administered either Eplerenone, 25 mg, or a placebo tablet orally twice daily for 4 weeks. This 4-week period will be followed by a 3-week washout period. After the washout period, patients will cross over in their treatment arms for 4 more weeks. Patients administered Eplerenone for the first 4 weeks will be given placebo for the last 4 weeks, and vice versa. All patients will serve as their own controls.