The following research paper, titled “Risk factors in the acute myocardial infarction of those treated in the catheterization laboratory in the General Hospital in Zadar”, represents a detailed description of risk factors as well as the ways in which they affect the development of the acute myocardial infarction.The paper is divided into several sections. The introductory section sets out the explanation of the myocardial infarction, the atherosclerotic vascular process and the different types of treatments. Furthermore, it goes into explaining risk factors and the ways in which they affect the development of the acute coronary syndrome. The central part of the paper refers to the research conducted on a sample of 400 patients with acute myocardial infarction treated in the catheterization laboratory of the General Hospital in Zadar. The research itself is based on the analysis of the presence as well as the frequency of risk factors for the atherosclerotic process in the patients. The results of the research are expressed in graphs and tables. The concluding part of the paper highlights the preventative measures aimed at reducing risk factors for the atherosclerotic disease and its consequences. Special attention is drawn to those preventative measures advocating the changing of harmful habits as well as the improvement of overall lifestyle.