The implantation of a mechanical valve within the orifice of a mitral Duran
flexible annular ring is presented. Exact orifice matches of the former ri
ng and the new mechanical valve prosthesis (Advancing The Standard [ATS]; A
TS Medical Inc, Minneapolis, MN) can be obtained using a standard mitral ty
pe ATS valve, when the size of the former Duran ring is larger than 31 mm.
If ring dehiscence is not noted at reoperation after mitral valve repair, t
his procedure can be simply performed in patients with late mitral valve dy
sfunction requiring valve replacement. (C) 1999 by The Society of Thoracic
Surgeons.