The implant (10) for implantation around the surrounding tissue structure (1000) in the heart comprises a flexible elongate member (20) and locking means (60). The flexible elongate member (20) has a longitudinal axis (25) and has a first distal end (30), a second distal end (35), and a first distal end. An intermediate portion (40) extending between the portion (30) and the second distal end (40), and a first distal end (30) and a second distal end (40) There is a lumen (50) extending longitudinally therethrough through the intermediate portion (40). The locking means (60) allows the first distal end (30) to be fixedly connected to the second distal end (40) so that the elongate member (20) is a closed loop. To do. The first distal end (30) is provided with a first distal opening (80) connecting the lumen (50) to the outside of the member (20) and the second distal end (35). Is provided with a second distal opening (90) connecting the lumen (50) to the outside of the member (20) and the intermediate portion (40) having the lumen (50) on the outside of the member (20). Proximal opening (100) is provided, the proximal opening (100) being longitudinally spaced from both the first distal opening (80) and the second distal opening (90).心臓内の周囲組織構造（１０００）の周囲への埋め込み用のインプラント（１０）は、可撓性長尺部材（２０）とロック手段（６０）とを備える。可撓性長尺部材（２０）は、長手軸線（２５）を有し、第１の遠位端部（３０）と、第２の遠位端部（３５）と、第１の遠位端部（３０）および第２の遠位端部（４０）との間を延びる中間部（４０）と、第１の遠位端部（３０）および第２の遠位端部（４０）との間を中間部（４０）を通って長手方向に延びている内腔（５０）を有する。ロック手段（６０）は、長尺部材（２０）を閉ループとするように、第１の遠位端部（３０）を第２の遠位端部（４０）に固定的に連結することを許容する。第１の遠位端部（３０）には、内腔（５０）を部材（２０）の外側につなぐ第１の遠位開口（８０）が設けられ、第２の遠位端部（３５）には、内腔（５０）を部材（２０）の外側につなぐ第２の遠位開口（９０）が設けられ、中間部（４０）には、内腔（５０）を部材（２０）の外側につなぐ近位開口（１００）が設けられ、近位開口（１００）は、第１の遠位開口（８０）と第２の遠位開口（９０）の両方から長手方向に離れている。
