At present the prehospital response teams are a fundamental piece in the prognosis of patients presenting medical emergencies in the outpatient. Ischemic heart disease during the period 1997-2007 in Chile killed 87,342 Chileans, 60% of these deaths were out of hospital. The confrontation of this pathology begins in the centers of emergency dispatches that correspond to the main articulator of the network when these types of emergencies occur. These are kept in permanent listening on the needs of emergency attention of the population, being the point of consultation of patients with chest pain, their mission is to recognize dispatching the right equipment and even begin therapy. Once the teams contact the patient, an electrocardiogram must be performed in the prehospital intervention, which reduces the time to diagnosis, decreases the time to primary angioplasty and allows a prehospital triage. In the management of acute coronary syndrome in the last years, prehospital thrombolysis is a therapy used in some prehospital and the use of biomarkers is also a reality. These last interventions are analyzed in detail in the following article.