Fig. 1

A Left pulmonary vein occlusion (red arrow). B Main pulmonary artery outline development (red arrow). C The SWARTZ outer sheath penetrates the left atrial wall (white arrow), and the contrast agent remains in the pericardium (red arrow). D The 0.035–260 cm guide wire exchange and introduction of the occluder interventional delivery device (black arrow); the 0.018–300 cm guide wire remains on the outside (white arrow). E Release of the shape memory ventricular septal occluder (red arrow). F Postoperative review via CTA revealed that the shape of the memory ventricular septal occluder was in a good position (red arrow). a Schematic diagram of the interatrial septum puncture needle entering the pulmonary artery. b Schematic diagram of the interventricular septal occluder used for atrial septal defect occlusion