The present invention provides a device for use in transcatheter treatment of mitral regurgitation, in particular a joint assist element to be implanted throughout the valve, a system including a joint assist element and anchor for implantation, a joint assist element and a delivery catheter. A system including, as well as a method of transcatheter implantation of a joining element throughout a heart valve.本発明は、僧帽弁逆流の経カテーテル治療で使用されるデバイス、具体的には弁全体に埋め込まれる接合補助要素、埋込み用の接合補助要素およびアンカーを含むシステム、接合補助要素および送達カテーテルを含むシステム、ならびに心臓弁全体に接合要素を経カテーテル的に埋め込む方法に関する。