Transcatheter closure of sinus venosus atrial septal defect with anomalous pulmonary venous drainage: Innovative technique with long-term follow-up.

INTRODUCTION

Surgical closure of sinus venosus atrial septal defect (SVASD) is the standard management. A safe and effective transcatheter approach will be an attractive option.

OBJECTIVES

To assess the feasibility and long-term safety of transcatheter closure of SVASD with anomalous pulmonary venous drainage.

PATIENTS AND METHODS

From July 2011 to October 2013, four patients with large SVASD and anomalous right upper pulmonary venous (RUPV) drainage underwent transcatheter closure of their defects at Ibn-Albitar Center for Cardiac Surgery, Baghdad, Iraq. Two patients with superior vena cava (SVC)-type SVASD underwent closure using covered Cheatham-Platinum (CP) stents with no need for septal occluder. The other two patients had large RA-type SVASD who underwent closure using covered CP stents only in one patient and stents and device in the other one. An angiogram in the RUPV during balloon inflation in the SVC was done to ensure that the RUPV drains back to the left atrium. The covered CP stent was mounted and hand crimped onto Z-Med™ or BIB-balloon catheters and deployed in the desired location under transesophageal echocardiography guidance.

RESULTS

The two patients with SVC-type SVASD underwent successful closure using two overlapping covered CP stents implanted in the SVC, thus creating total septation between the SVC and the RUPV. The RA-type SVASD patients underwent closure using two overlapping covered CP stents. One with mild to moderate residual shunt that completely disappeared at 12 months follow-up after implantation of a second 45 mm CP stent. A significant residual shunt in the second patient was closed successfully using a PFO device.

CONCLUSION

Transcatheter closure of SVASD through SVC stent insertion with or without subsequent device implantation is feasible and effective.