The aim of our study was to show to what extent direct transport of patients with ST-segment elevation myocardial infarction (STEMI) from the field to a catheterization laboratory affects shortening of the time-to-reperfusion with primary PCI and what effect it has on their mortality. Although the management of patients with STEMI in prehospital care has dramatically changed in the recent years, still a non-negligible proportion of patients are transported to regional hospitals and only afterwards to a catheterization laboratory.