• Xiaoning Sun, Hongqiang Zhang, Kai Zhu, and Chunsheng Wang.
• Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China; Shanghai Institute of Cardiovascular Disease, Shanghai 200032, PR China.
• Int. J. Cardiol. 2018 Mar 15; 255: 184-187.

BackgroundKommerell's diverticulum is a complex congenital malformation of aorta. Three-dimensional (3D) printing is an innovative manufacturing process that allows computer-assisted conversion of 3D imaging data into physical "printouts." The aim of this study was to explore the feasibility and impact of using patient-specific 3D-printed cardiac prototypes derived from computed tomography data on surgical decision-making and preoperative planning for Kommerell's diverticulum.MethodsFrom April to August 2017, five patients with Kommerell's diverticulum were diagnosed and chosen for study. Cardiac computed tomography was done for all patients. One case was diagnosed with left aortic arch, and another four cases presented right-sided aortic arch and aberrant left subclavian artery. In addition, one patient complicated with aortic dissection. Data were used to generate patient-specific 3D models. All cases were reviewed along with their models, and the impact on surgical decision-making and preoperative planning was assessed.ResultsAccurate life-sized 3D models were successfully printed for all patients. These models enabled improved understanding of aortic malformation and preoperative planning. 3D models also allowed real-time intraoperative guidance for surgeons.Conclusions3D printed models can improve the understanding of anatomy and allow anticipation of surgical technique challenges, which could radically assist surgical planning, and safe execution of surgery for Kommerell's diverticulum. The combination of 3D printing technique and surgical procedure is a promising perspective for treatment of complex aortic malformation.Copyright © 2017 Elsevier Ireland Ltd. All rights reserved.

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