Appropriate assessment using virtual reality simulation for a novel reshaped curve sheath during percutaneous left...

We previously reported a case of successful percutaneous left atrial appendage closure (LAAC) for complex left atrial appendage (LAA) morphology using a handmade double-curve delivery sheath (DS) reshaped by a heat gun. However, whether the reshaped curve was appropriately adjusted as an optimal configuration for this patient's anatomy remained uncertain.

We established the LAAC procedural simulation model supported by virtual reality (VR) technology. With this VR simulator, the patient's whole heart model with venous access route and atrial septal puncture point of foramen ovale (FO) could be replicated based on the pre-procedural computed tomography image. Multiple views of the VR image provided a deep understanding of the patient-specific anatomy. Additionally, the operators were enabled to perform the virtual LAAC procedure using VR-derived LAAC devices, including various DS types. In the VR simulator, the manually reshaped DS showed better co-axiality from the FO to the LAA orifice than the conventional double-curve DS, resulting in the successful deployment inside the LAA of the VR simulator. However, the perpendicularity of the device towards the LAA orifice of the handmade reshaped DS remained insufficient. The VR simulator suggested that the ideal curve of the DS needed to change relatively posteriorly and have a more aggressive inferior slide than the previously reshaped DS.

The post-procedural review of the VR simulator confirmed that the sheath reshaping technique helped ensure successful LAAC. Pre-procedural VR simulation may be useful for procedural planning that includes DS reshaping for patients with challenging anatomy undergoing LAAC.