The Realheart TAH system (RTS) is the first total artificial heart designed to mimic the structure and function of the human heart. Its unique patented construction of two atria and two ventricles is separated by an atrioventricular plane which contains the valves, enabling to pump blood naturally whilst reducing the risk of blood flow complications. RTS is designed to be efficient (12h battery), silent, lightweight (1-2kg), easy to implant and automatically adapt to different (physiological) activity levels. It consists of two identical artificial heart pumps, a drive line and an intelligent control unit. RTS is connected via a cable through the skin to a controller with integrated batteries. Depending on the outcome of patient usability studies, the system will be offered with an optimal carrying solution, which could for example be a backpack or belt around the waist. RTS is initially aimed for end-stage heart failure patients waiting for a transplant, but the bigger project impact is delivered by the second application which is to offer the system to the large majority of heart failure patients that do not qualify for the heart transplant waiting list. Realheart will complete GLP animal trial, clinical trial preparatory activities and first-in-man (EFS) trial during the EIC project.