Ventricular assist systems are devices that are intended to treat a terminal heart failure that can no longer respond or with drugs or the use of conventional pacemakers. Its function is to emulate the heart, helping the correct circulation of blood from the left ventricle to the heart and to the whole organism. Generally, the ideal candidates for this type of device are patients who are on the waiting list for a heart transplant, whose only hope of survival is the placement of these care system, although it is also a good solution for those patients who are not candidates optimal for a heart transplant because these devices allow extend their lives. For placement, it is necessary to perform a surgical intervention under general anesthesia. The system consists of three parts: a pump, which can be continuous or pulsatile flow (located inside the abdomen), an electronic controller and a battery.