2.3. Surgical procedure
The technical details of the mitral valve repair procedure were determined at the surgeon’s discretion according to the mitral morphology. There were two approaches for the mitral valve: an incision to the LA and an incision to the right atrium and atrial septum. The techniques for leaflet repair were selected from a new chordal replacement, leaflet resection (quadrangular or triangular leaflet resection) and leaflet augmentation. A semi-rigid full ring or a flexible band was implanted in all patients.