Acute coronary syndrome (ACS) is an emergency that requires prompt medical intervention to reduce the risk of heart attack and other complications. The main goal of this research is to collect data on the number of patients who suffered from ACS during 2021 and 2022, and were cared for in ZZHM LSŽ. In the research conducted in the period from January 1, 2021 to December 31, 2022, a total of 250 patients with a diagnosis of ACS were treated at the Health Institute for Emergency Medicine of the Lika-Senj County (ZZHM LSŽ). Of these, 47 patients were admitted to the outpatient clinic of ZZHM LSŽ, while the rest, 203 of them, were treated in the field. The survey also showed that the largest number of ACS patients were in the older age group, with 146 patients aged 64 and over. According to gender, 162 patients were male, while 88 were female. These results suggest the need for special attention and intervention in the care of the elderly and men who are at higher risk of ACS. Fast and adequate emergency medical intervention is crucial in the care of patients with ACS outside the hospital. The collected research results provide valuable information about the prevalence, age and gender characteristics of ACS patients in the ZZHM LSŽ area, which can contribute to the improvement of emergency medical care and the prevention of heart diseases.