Abstract: A cardiac assist device (100) comprises a stent 103, 403) which is implantable into a blood vessel of a patient. The stent (103, 403) encloses an inner volume (119, 419). At least one inflatable element (104, 409-413) is attached to the stent (103). The at least one inflatable element (104, 409-413) is provided in the inner volume (119, 419) of the stent (103, 403), wherein the ai least one inflatable element (104, 409-413) annularly encloses a central opening (118, 418) being parallel to a longitudinal axis of said stent (103, 403). The cardiac assist device (100) further comprises a fluid supply adapted for periodically inflating and deflating the at least one inflatable element (104, 409-413), wherein said fluid supply comprises at least one fluid supply line (105, 405) connectable to the at least one inflatable element (104, 409-413) and implantable into a blood vessel of the patient.