New chords formation of mitral valve using expended-polytetrafluoroethylene sutures was performed in six patients with mitral regurgitation (MR) from April, 1994 to March, 1995. There were 3 men and 3 women whose mean age was 65 years, ranged from 55 to 75. A double-armed pledget suture was passed through the lateral portion of papillary muscle head and tied. Each arm of the suture was brought up to the free margin of the leaflet and passed through the area where the native chorda was attached. At leaflet surface, one more weaving was made. fter the lengths of the two arms were adjusted, the ends were tied. There were no operative deaths. Patients have been followed up from 2 to 13 months, mean 8. Echocardiographic sutudies were performed at 10 days after operation and revealed normal mitral valve function in all patients.