A prosthetic heart valve can include a frame and a leaflet assembly. The frame can include first and second commissure support portions defining a frame opening therebetween. The leaflet assembly can include a first leaflet comprising a first commissure tab, a second leaflet comprising a second commissure tab, a first wedge coupled to the first commissure tab of the first leaflet, and a second wedge coupled to the second commissure tab of the second leaflet. The first and second wedges and the first and second commissure tabs can extend through the frame opening. The first wedge can be coupled to the first commissure support portion and the second wedge can be coupled to the second commissure support portion.