Abstract
BACKGROUND: Persistent left superior vena cava (LSVC) to unroofed coronary sinus (CS) poses long-term risks, including cyanosis and paradoxic embolus with stroke, as well as left to right shunting at the CS ostium. We present a case in which 3D modeling enabled a novel technique for repair with transcatheter baffling. CASE SUMMARY: A 56-year-old woman with dyspnea, hypoxemia, and atrial arrhythmias underwent successful transcatheter baffling of her LSVC to CS after preprocedural planning with advanced imaging and 3D model printing. DISCUSSION: Although surgical techniques for this congenital lesion are well described, this novel approach enabled a minimally invasive repair via transcatheter baffling.