An implantable cardiac therapy device having a heart assist pump, a stimulation unit, and a control unit. The heart assist pump is designed to be connected to a ventricle of a heart and an associated artery, and is designed to pump blood from a particular ventricle into an associated artery, thereby supporting the particular ventricle. The stimulation unit is designed to electrically stimulate a heart contraction, and the control unit is designed to control the heart assist pump and the stimulation unit in such a way that the stimulation unit induces synchronized motions of cardiac contraction while the heart assist pump operates in a ventricle-supporting manner.
