Background: Identifying predictive factors based on procedures carried out by emergency medical teams may speed up the diagnosis of AMI. By shortening the time between the onset of the pain and the initiation of coronary reperfusion, patient prognosis can be improved Methods: The study was conducted on residents of the Bielsko-Biała district, served by state ambulance service Medical Response Teams (MRT). The patients were assigned to the following groups: Group A (n = 338) - patients with chest pain in whom infarction with elevation of the ST segment (ST-ACS) was diagnosed on the basis of an ECG, Group B (n=300) - patients with chest pain in whom an infarction was not diagnosed. A factor structural test for the studied parameters was used to determine their significance. An odds ratio (OR) was established for statistically significant parameters, and multi-dimensional logistic regression analysis was conducted. The significance of the odds ratios (OR) was estimated for individual risk factors based on 95% confidence intervals (CI). Results: It can be stated with 95% probability that the significant parameters: Male (p=0.00001), Age 51-70(p=0.00307), Breathing rate less than 12/min(p=0.02711), Pulse below 60 min (p=0.00165), Edemas (p=0.00075), Moist skin(p<0.01), Sinus rhythm (p=0.00004), Additional ventricular beats(p=0.00133) increase the risk of myocardial infraction. Conclusion: Identifying the predictors of myocardial infarction specific to pre-hospital emergency care is essential for improving the detection of AMI and shortening the time between calls to the MRT and the initiation of coronary reperfusion.