Catheter pump to be positioned in the ascending aorta (11) near the aortic valve (10) of a human being, comprising an elongated sleeve (6) with an actuating cable (5) extending through the sleeve and which can be connected at its proximal end to an external drive source and to a drive rotor near the distal end of the drive cable (5), mounted on a drive shaft (4) that is connected to the drive cable (5) , where the drive rotor consists of a propeller (3) that is enclosed in a cage (2), consisting of bands, strands or strips, whereby the ends of a certain number of said bands, strands or strips are anchored in two movable sleeves (22) against each other on the drive shaft (4), and where the propeller (3) and the cage (2) are foldable from an insertion position close to the drive shaft (4) to a position expanded work, where the pump It further comprises means for anchoring the drive rotor (3) in the ascending aorta (11) near the aortic valve (10) after insertion, characterized in that the means for anchoring the drive rotor consist of an extension (7) of the end distal of the catheter intended to be carried to the heart (9) to be supported against the wall of the heart, whereby the extension has a length such that if the distal end of the extension is supported against the wall of the heart, the propellant (3) and the cage (2) is positioned outside the heart but in the ascending aorta (11) near the aortic valve (10).Bomba para catéter para ser posicionada en la aorta ascendente (11) cerca de la válvula aórtica (10) de un ser humano, que comprende un manguito alargado (6) con un cable (5) de accionamiento que se extiende a través del manguito y que puede conectarse en su extremo proximal a una fuente externa de accionamiento y a un rotor de accionamiento cerca del extremo distal del cable (5) de accionamiento, montado sobre un eje (4) de accionamiento que está conectado con el cable (5) de accionamiento, donde el rotor de accionamiento consiste en un propulsor (3) que e
