This study addresses the critical issue of obesity and its impact on patients with acute coronary syndrome (ACS). While obesity is a known risk factor for cardiovascular diseases, emerging evidence suggests that obese patients with coronary artery disease may have better survival outcomes-a phenomenon known as the \"obesity paradox.\" Our research aims to explore this paradox by examining the body composition of ACS patients using bioimpedance analysis (BIA). We will evaluate parameters such as lean mass, body fat, and fluid volume to assess their relationship with clinical outcomes, including mortality and the incidence of heart and kidney failure. By focusing on body composition rather than just BMI, this study seeks to provide a more accurate understanding of how these factors influence patient outcomes. Conducted at a major hospital in Argentina, the study will contribute valuable insights into the role of body composition in the prognosis of ACS, potentially informing more personalized treatment strategies.