Abstract: A device (1) for covering, supporting, and/or sealing a region of tissue affected by a ventricular septal defect (2) in the heart wall (3) between the left and right ventricles is provided. It has at least one, and preferably two oblong holding and/or guiding parts (5), which are each used for at least one soft and smooth membrane body (6) or a comparable patch. The patch or membrane body (6) is longitudeinally stretched out against its elasticity in an original position and has only a small lateral extent relative to its length. By loosening one end of this longitudinally stretched-out arrangement, the membrane body (6) can be widened due to a restoring force, so that it attains a planar shape for covering the heart-wall defect (2).

Abstract: A device (1) for closing a canal-shaped anastomosis (2), between the aorta (3) and the pulmonary artery (4), which remained open after the birth of a person (6). It is formed by a closing element (8) that can be inserted using a catheter (7) and that has two seals (10) and (11) spaced apart from each other and connected via an elastic tension element (9). The two seals have a certain elasticity and in the usage position, cover or fill up the two mouths or ends of the anastomosis (2), located between the aorta (3) and the pulmonary artery (4). The seals (10) and (11) can be folded, so that they on the one hand fit into the catheter (7) and on the other hand, can be introduced through the anastomosis (2) and brought to the respective application position.