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The Cox-Maze IV procedure (CMP-IV) is the only operation and technology with an FDA-approved indication for the surgical treatment of AF. In addition, the 3D printing technique enabled us to practice the Cox-maze IV procedure, given the patient's unique cardiac anatomy. The case herein is one of the first to report on adopting the CMP-IV procedure for situs inversus dextrocardia patients with complex valvuloplasty operation.

The patient had an uneventful recovery and was in sinus rhythm during a 12-month follow-up period using a 24-h Holter monitoring device. Mitral valvuloplasty, CMP-IV, and tricuspid annuloplasty were performed. A three-dimensional (3D) heart model printing device embedded with designated ablation lines was used for pre-operative planning. The patient was diagnosed with situs inversus dextrocardia, severe mitral regurgitation, and paroxysmal atrial fibrillation. Herein, we present the case of a 39-year-old male patient admitted to our cardiac center following progressive exertional dyspnea. The safety and efficacy of the Cox-Maze IV procedure (CMP-IV) for situs inversus dextrocardia patients with atrial fibrillation is yet to be determined.

Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, China.

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