Novel technique for transcatheter closure of sinus venosus atrial septal defect: The temporary suture-holding technique.

Background: Transcatheter repair of sinus venosus atrial septal defect (SVASD) has become an alternative option to surgical repair. There are potential significant complications related to stent stability in the superior vena cava (SVC) and potential migration of the stent that need to be addressed. Therefore, the technique is still evolving.

Objectives: To report results of a new modification "the suture technique" that improves safety profile of positioning and securing a covered stent in the SVC.

Methods: This is a descriptive, single center, retrospective review of patients who underwent SVASD closure using the suture technique at our institution between 02/2020 and 08/2022.

Results: Fourteen patients underwent transcatheter repair of SVASD using the suture technique. All procedures were successful. The suture technique allowed precise stent placement in all patients without any migration or complication. Six patients required additional stent placement at the level of the SVC. One patient had an additional covered stent placed to eliminate a tiny residual shunt. Two patients had negligible residual shunts at the time of the procedure. At follow-up, all patients clinically improved and had significant reduction in right heart size on echocardiography and/or magnetic resonance imaging. No arrhythmia was reported in any patient. None required re-intervention after a mean follow-up of 16.5 ± SD 10.5 months.

Conclusions: The suture technique appears to be safe modification. Although our study involves small sample size with no comparative group, we believe our technique offers greater control over stent positioning, reducing the risk of stent embolization and residual shunting in transcatheter closure of SVASD.