The present invention relates to an anchoring device (1) designed for anchoring a prosthetic heart valve inside a heart, comprising an extraventricular part (2) designed to be positioned inside an atrium or an artery and a ventricular part (3) designed to be positioned inside a ventricle, and comprising an outer wall (4) and an inner wall (5), wherein said outer wall (4) and said inner wall (5) are spaced apart at the level where the prosthetic heart valve is intended to be inserted in order to mechanically isolating the inner wall (5) from the outer wall (4). The present invention also relates to an anchoring system (11) for anchoring a prosthetic heart valve inside a heart, comprising said anchoring device (1), a prosthetic heart valve support (12) and a prosthetic heart valve (13) connected to the prosthetic heart valve support (12).
