Abstract: A catheter system comprising at least one catheter shaft 3, an anisotropic implant, in particular an implantable heart valve prosthesis 6, a control device for controlling and manipulating the catheter, and at least three electrodes 4, 5 and 11 in the distal region of the catheter, which are each conductively connected to an analysis unit by their own electrode lead. The catheter system can change between an insertion state and an orientation state, wherein this change is triggered by a manipulation of the control device. In the orientation state the three electrodes of the catheter system span a spatial angle that is different from that spanned in the insertion state.

Abstract: Embodiments include a sensor arrangement including a primary sensor in the form of a self-adhering surface electrode that records electric signals. The self-adhering surface electrode includes a primary sensor to contact skin, and a secondary sensor, which differs from the primary sensor, to detect a secondary physical variable. In addition, the sensor arrangement includes an adapter, via which the primary sensor and the secondary sensor are interconnected to form a detachable unit.

Abstract: Embodiments include an electrocardiography system that includes or is connected to a sensor arrangement, wherein the sensor arrangement includes surface electrodes that record electric signals. The electrocardiography system includes a signal processing unit, with filters and amplifiers, which is electrically connected to the sensor arrangement. The electrocardiography system includes a signal evaluation unit connected via a first signal input to the signal processing unit. The signal evaluation unit processes one or more prepared ECG signals provided by the signal processing unit in order to recover an electrocardiogram signal and to display the electrocardiogram signal. The signal evaluation unit includes a second signal input that receives secondary signals obtained by body sensors or monitors, wherein the signal evaluation unit processes the prepared ECG signals depending on the secondary signals.