The purpose of the research is to determine whether a medication called dapagliflozin will
improve the heart's function and reduce its enlargement after a heart attack. Participation
in this study will involve taking the medication dapagliflozin (or a placebo) once daily for
six months, one cardiac magnetic resonance imaging (MRI) test during your initial
hospitalization, follow-up phone calls at 1 and 3 months, and one cardiac MRI and clinic
visit at six months.