An implantable system for the diagnostic and/or therapeutic treatment of a human or animal patient contains a processor, a memory, a treatment unit and a remote data transmission unit. The system is characterized in that the memory includes a computer-readable program which prompts the processor to carry out the following steps when the program is being executed on the processor: a) ascertaining whether a treatment functionality of the treatment unit could jeopardize a patient in whom the system was implanted if a diagnostic and/or therapeutic treatment of the patient corresponding to the treatment functionality were to be carried out; b) deactivating the treatment functionality when a potential risk for the patient was ascertained; c) receiving reactivation data by way of the remote data transmission unit; and d) reactivating the deactivated treatment functionality based on the received reactivation data.