Self-deploying axial-flow pump introduced intravascularly for temporary cardiac support

An axial-flow pump to be introduced intravascularly for cardiac support comprising a catheter and a drive shaft, a self-deploying and radially compressible flexible tube in combination with a self-deploying and radially compressible rotor within the tube, the tube being connected with the catheter and the rotor being connected with the drive shaft, extending coaxially in the catheter, the flexible tube is a self-deploying and radially compressible flexible tube dimensioned such that it can pass the aortal valve of the heart when deployed, the self-deploying rotor is a wire helix elongated when compressed and helical when deployed, both ends of which terminate in a central axis under an acute angle by an elastic band connecting both ends by extending along the central axis, and the rotor further including an elastic cover between the wire helix and the band.