The authors present their experience with the Memo 4D ring by LivaNova in complex mitral valve repair. Learn more: https://www.ctsnet.org/article/novel-and-versatile-tool-mitral-valve-repair-memo-4d-system The Cardiothoracic Surgery Network (CTSNet) connects the global cardiothoracic community through communication, collaboration, education, and interaction amongst cardiothoracic surgeons and their teams across the globe. CTSNet provides a broad range of video and text-based educational content, the premier job board across all of cardiothoracic surgery, profile pages for cardiothoracic surgeons and individuals associated with the specialty, and a calendar of events related to the specialty.