The invention relates to a system for ventricular circulatory support, comprising a device (2) for applying a magnetic field to a magnetised body fluid (1), particularly blood, in a region of a vessel (3), particularly a blood vessel. The system also comprises a control device designed to actuate said device (2) for applying a magnetic field such that, in the region of the vessel (3), a magnetically-induced force acts on the magnetised body fluid (1) in the longitudinal direction of said vessel (3).