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. Herein, we present the case of a 39-year-old male patient admitted to our cardiac center following progressive exertional dyspnea. The patient was diagnosed with situs inversus dextrocardia, severe mitral regurgitation, and paroxysmal atrial fibrillation. A three-dimensional (3D) heart model printing device embedded with designated ablation lines was used for pre-operative planning. Mitral valvuloplasty, CMP-IV, and tricuspid annuloplasty were performed. 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. 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. In addition, the 3D printing technique enabled us to practice the Cox-maze IV procedure, given the patient's unique cardiac anatomy.

Cox-Maze IV 手术 (CMP-IV) 对患有心房颤动的右位反转患者的安全性和有效性尚待确定。在此，我们介绍了一名 39 岁男性患者在进行性劳力性呼吸困难后入住我们心脏中心的病例。患者被诊断为右位心内翻位、重度二尖瓣关闭不全和阵发性房颤。嵌入指定消融线的三维 (3D) 心脏模型打印设备用于术前计划。进行了二尖瓣成形术、CMP-IV 和三尖瓣瓣环成形术。在使用 24 小时动态心电图监测设备的 12 个月随访期间，患者恢复顺利，并处于窦性心律。该病例是最早报道采用CMP-IV手术治疗复杂瓣膜成形术的右位位反转患者的病例之一。此外，鉴于患者独特的心脏解剖结构，3D 打印技术使我们能够练习 Cox-maze IV 手术。