This article discusses heart blood flow and its significance for EMTs in their training. It provides a review for EMTs preparing for the NREMT exam. Understanding the flow of blood through the heart is crucial for EMTs to recognize and effectively manage different medical emergencies. The article aims to educate EMTs about the importance of a comprehensive understanding of heart anatomy, including the chambers, valves, and blood vessels. By grasping heart blood flow, EMTs can enhance their ability to provide timely and appropriate pre-hospital care.