#$%^&*AU2020227105A120200924.pdf#####Abstract An implantable device for improving the pump function of the heart of a human patient by applying an external force on the heart muscle is provided. The device comprises at least one pump device having a pump. The pump comprising a piston adapted for reciprocating movement, an operating device for operating the piston, a heart contacting organ. The movement of the piston assists the pump function of the heart through said heart contacting organ.5/59 I,' ~ Fig. 9 242b 242a 241a 51 241b 3 150 H 2403 Fig. 11 I I 1 52 - -.- -51 Ii 506 I/ H 'I /Fig. 10 2a/ III 2b 2441a / 244 50a . 240__ H/