annuloplasty

noun

an·​nu·​lo·​plas·​ty ˈan-yə-(ˌ)lō-ˌpla-stē 

plural annuloplasties

: surgical treatment of a ringlike anatomical part

specifically : surgical repair of a heart valve that typically involves reducing the diameter of the valve's fibrous ring

Severe tricuspid regurgitation should clearly be repaired because it has been widely demonstrated that annuloplasty provides excellent late results with little added morbidity.

—Charles F. Schwartz et al., in Schwartz's Manual of Surgery