360-Degree Cone Reconstruction for Ebstein's Anomaly.

Several modifications of the cone procedure as first described by da Silva have been reported. We have used a complete 360-degree leaflet detachment coupled with a 60-degree counterclockwise rotation in performing the cone procedure in children and adults. We believe that complete leaflet detachment coupled with counterclockwise rotation provides both for better alignment of the leaflets and subvalvular apparatus and for a more symmetric distribution of tension after leaflet reattachment, thus potentially resulting in better valve function and longevity of repair.