Transcatheter self-expanding stent closure of sinus venosus atrial septal defects with indigenous method of determining appropriate stent length without advanced imaging techniques -A case series of single centre experience

Transcatheter closure of sinus venosus defect: First‐in‐human implant of a dedicated self‐expanding VB stent system

“…However, 3D‐printed models were used during the phases of VB stent design and manufacture. Additional PV draining above the defect have usually led to exclusion of such cases for transcatheter closure, as previous closures were all done by the off‐label use of balloon expandable or self‐expandable stents which would oppose uniformly to the SVC wall 6,7 . The unique dumb‐bell shaped design of the VB stent circumvents this problem and permits unobstructed flow of additional PV back to the LA (Figure 6, Supporting Information: Video ).…”

“…Additional PV draining above the defect have usually led to exclusion of such cases for transcatheter closure, as previous closures were all done by the off-label use of balloon expandable or self-expandable stents which would oppose uniformly to the SVC wall. 6,7 The unique dumb-bell shaped design of the VB stent circumvents this problem and permits unobstructed flow of additional PV back to the LA (Figure 6, Supporting Information: Video 7). RA type of SV defects are technically more difficult to close compared to the SVC type, as the lower end of balloon expandable stents must be flared further using additional balloon inflations to achieve defect closure, while ensuring unobstructed flow of the right PV.…”