3D-TEE: an essential tool for percutaneous occlusion of atrial septal defects with anomalous band

This case emphasizes the superiority of 3D-TEE over conventional imaging in assessing ASD morphology, particularly in the presence of anatomical variations like anomalous band. We emphasize its value not only for accurate device selection and procedural planning but also as a critical teaching tool for operators learning procedural 3D echocardiography guidance. Accurate visualization of the ASD and surrounding structures facilitates optimal device selection and improves clinical outcomes.