The disclosure relates to a medical implant system (1), comprising: an implant (2) that is implantable into a patient, and a catheter (3) configured for explanting the implant (2). The catheter (3) and/or the implant (2) is configured to measure a distance (D) between a tip (30) of the catheter (3) and the implant (2). The system (1) is configured to generate an output signal indicative of said distance (D). In another embodiment, the system (1) comprises a sensor element (22) which is configured to measure at least one physical quantity indicative of a local anatomical environment of the implant (2). Also, methods for recapturing and/or explanting an implanted implant (2) are provided.