This systematic review explores the impact of dapagliflozin on heart failure (HF) and acute myocardial infarction (MI) in patients with type 2 diabetes mellitus. By analyzing recent studies, including both randomized controlled trials (RCTs) and retrospective analyses, this review provides insights into the cardiovascular effects of this sodium-glucose cotransporter 2 (SGLT2) inhibitor. The findings consistently demonstrate the benefits of dapagliflozin in reducing HF-related hospitalizations and improving outcomes for patients with established HF. These positive effects appear to extend beyond glycemic control, suggesting multiple mechanisms of action. The impact of dapagliflozin on acute MI outcomes is less clear, with mixed results across studies. Importantly, dapagliflozin shows promise in improving the quality of life of patients and is generally well-tolerated. The review suggests that dapagliflozin may play a significant role in managing cardiovascular risk in diabetic patients, particularly those with or at risk of HF. While the evidence is encouraging, the review also highlights areas requiring further investigation. These include determining the patient subgroups most likely to benefit from dapagliflozin, elucidating the precise mechanisms underlying its cardioprotective effects, and carrying out long-term outcome studies.