A system and method for cardiac assist of a heart in a beating stage comprising a double balloon catheter having a proximal end and a distal end, the catheter having at least one lumen； an inflatable intra-ventricular balloon mounted on the catheter near the distal end of the catheter, the balloon having a lumen in fluid communication with the lumen of the catheter and being configured for inflation in a ventricle； and an intra-aortic balloon mounted on the catheter proximally to the intra-ventricular balloon； a control unit comprising a bidirectional pump； a fluid reservoir； and a processor configured to activate the pump； wherein the proximal end of the catheter is configured for attachment to the control unit to form a fluid conduction system in which fluid is configured to be pumped by the pump between the fluid reservoir and the intra-ventricular balloon and the intra-aortic balloon； and systolic augmentation comprising a new pressure wave which is generated when said balloon is inflated at the end of the slow ejection phase of the beating heart, such that any residual volume of blood left in said ventricle is displaced.
