Proposed concepts thus aim to provide schemes, solutions, concept, designs, methods and systems pertaining to representing a predicted length of a heart valve leaflet. This can be achieved by obtaining both a 3D model representative of the geometry of a heart valve leaflet and a predicted length of the heart valve leaflet. The 3D model can then be adapted based on the predicted length to generate an adapted 3D model representing an extension of the heart valve leaflet to the predicted length.