Artificial heart valve, device for performing a catheter-based implantation of an artificial heart valve, device for an in-situ replacement of an inner artificial heart valve, method for explanting an artificial heart valve, and method for reimplanting an artificial heart valve

Device for performing catheter-based implantation of an artificial heart valve (27), consisting of

• a tube-like flexible initial implantation sheath (22), a guide wire (31) movable within the initial implantation sheath and the two-piece artificial heart valve (27), which is displaceable within the initial implantation sheath (22) along the guide wire (31) and consists of an outer artificial heart valve (14) and an inner artificial heart valve (8) or a displaceable inner heart valve insert (8) for insertion into an already pre-implanted outer heart valve insert (14).

Device for an in-situ replacement of an inner artificial heart valve (8) with a new inner artificial heart valve (8) in an implanted two-piece artificial heart valve (27), comprising the inner artificial heart valve (8) and an outer artificial heart valve (14),

• consisting of
• an explantation catheter for an explantation of the inner artificial heart valve (8), comprising a tubular-flexible explantation sheath (29) with a guide wire (31) arranged in the explantation catheter and an explantation tool guided in the explantation sheath with means for gripping and releasing anchors of the inner artificial heart valve (8) with a proximal operating unit (10) for semi-automatic operation of the explantation tool and an implantation catheter, comprising a tubular-flexible implant exchange sheath (30) with means for feeding and inserting a new inner artificial heart valve (8) into the outer artificial heart valve (14).

Method for reimplanting an artificial heart valve with the following steps of:

• using a two-piece artificial heart valve (27), consisting of an inner artificial heart valve (8) and an outer artificial heart valve (14), wherein the outer artificial heart valve (14) is firmly implanted in the anatomical region of the heart valve and remains permanently at the implantation site and the inner artificial heart valve (8) is advanced into the region of the pre-implanted outer artificial heart valve (14) by means of an implantation catheter and is inserted into the outer artificial heart valve (14) by means of an implantation tool located in the implantation catheter and is anchored via anchoring means located on the inner artificial heart valve (8).