The high level of mortality because of acute coronary syndrome encouraged to the analysis of the quality of emergency medical care at the pre-hospital stage, in order to prevent the occurrence of conflict situations, to improve the field workers' skills of emergency medical service teams, as well as to improve the medical support of the treatment process. The purpose of the study was to analyze the quality of pre-hospital emergency medical care for patients with acute coronary syndrome. Material and methods. The study is based on data obtained during a comprehensive examination and dynamic follow-up of 280 patients with stable ST-segment elevation and 91 patients without ST-segment elevation. The sample of patients was conducted between 2015 and February 2018. The effectiveness of the supported medical care was scored in the following way: 1 point was for the drug prescription according to the protocol, 0 points was for no drug prescription, 1 point was for each inappropriate prescription in administration of unrecommended maneuvers for the patients with acute coronary syndrome. Results and discussion. Groups of patients with acute coronary syndrome were comparable in terms of treatment time from the beginning of clinical manifestations of the disease. Administration of nitroglycerin, acetylsalicylic acid and clopidogrel did not have a significant difference, whereas β-adrenoblocker was reliably prescribed more frequently in the STEMI group of 151 (53.9 %) patients versus 28 (30.8%) individuals in the NSTEMI group (p < 0.05). Significantly narcotic analgesic was prescribed more often in the STEMI group of 249 (88.9 %) persons versus 61 (67.0 %) patients in the NSTEMI group (p < 0.05), which is most likely due to the clinical manifestation of acute coronary syndrome in the examined patients. Angina pain significantly prevailed in the STEMI group of 263 (93.9 %) people versus 76 (83.5 %) patients in the NSTEMI group (p < 0.05). Conclusion. It is necessary to develop an assessment model of the quality of emergency medical care including both the algorithm of care and unrecommended maneuvers for the patients with acute coronary syndrome.

Keywords: ischemic heart disease, acute coronary syndrome, quality of emergency medical care, pre-hospital stage

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