The present invention is specifically directed to a heart occlusion device with a self-centering mechanism. The heart occlusion device includes two separate uniquely shaped wires (12, 14, 12A, 14A) each forming shapes that mirror the respective wires shapes. Each wire forms half-discs or quarter-discs (12B, 12B, 14B, 14B) that together form a distal disc (16) and a proximal disc (18). In other versions, the device includes four separate wires, each mirroring its neighboring wire and forming a proximal and a distal quarter-disc. In the versions with four wires, the quarter-discs of each wire together form proximal and distal discs. The distal disc and proximal disc are separated by a self-centering waist (12C,14C). The proximal disc is attached to a hub (30) comprising a screw mechanism. A similar hub is optional on the distal disc. The discs further include coverings which form a sealant to occlude an aperture in a tissue. The wires forming the discs have a shape-memory capability such that they can be collapsed and distorted in a catheter during delivery but resume and maintain their intended shape after delivery.La présente invention porte spécifiquement sur un dispositif docclusion cardiaque pourvu dun mécanisme dauto-centrage. Le dispositif docclusion cardiaque comprend deux fils séparés de forme particulière (12, 14, 12A, 14A) ayant chacun des formes reflétant les formes de lautre fil. Chaque film forme des demi-disques ou des quarts de disque (12B, 12B, 14B, 14B) qui constituent en association un disque distal (16) et un disque proximal (18). Dans dautres versions, le dispositif comprend quatre fils séparés, chacun reflétant le fil voisin et formant un quart de disque proximal et distal. Dans les versions à quatre fils, les quarts de disque de chaque fil forment en association des disques proximal et distal. Le disque distal et le disque proximal sont séparés par une ceinture dauto-centrage (12C, 14C). Le disque proximal est fixé à un moyeu (30) comprenant un
