The invention relates to a heart implant comprising a tubular attachment element (1 ) for attaching a sheath, particularly having a sheath being coaxially positioned around at least a part of the tubular attachment element (1 ) and fixed to it, the tubular attachment element (1 ) having a lower end (1a) and an upper end (1 b) and being split into several strips (2) at the upper end (1 b), the strips (2) forming an expandable cage (C), particularly for fixing the heart implant to the atrium of the heart by surface contact between an exterior surface of the expandable cage (C) and an interior atrium surface, wherein in an expanded state the strips (2) extend from the upper end (1 b) towards the lower end (1a) of the tubular attachment element (1 ) and form an expanded cage (C) being positioned around at least an upper part of the tubular attachment element (1 ).
