Case Report: Catheter ablation of atrial fibrillation in a patient with cor triatriatum sinistrum: the pivotal role of intracardiac echocardiography and electroanatomic mapping - Takeaways - MDSpire

Case Report: Catheter ablation of atrial fibrillation in a patient with cor triatriatum sinistrum: the pivotal role of intracardiac echocardiography and electroanatomic mapping

  • By

  • Mingjie Lin

  • Nan Yang

  • Jing Kong

  • Jingquan Zhong

  • Kai Zhang

  • May 26, 2026

  • 0 min

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  • 1

    Cor triatriatum sinister (CTS) is a rare congenital heart defect that complicates catheter ablation of atrial fibrillation due to its unique anatomy.

  • 2

    Intracardiac echocardiography (ICE) was essential for guiding transseptal puncture and mapping the atrial chambers in the patient with CTS.

  • 3

    Electroanatomic mapping revealed a high-voltage area at the fibromuscular membrane, indicating the presence of myocardial tissue capable of electrical activity.

  • 4

    The patient underwent successful radiofrequency catheter ablation for persistent atrial fibrillation, highlighting the importance of individualized strategies.

  • 5

    This case emphasizes the need for advanced imaging techniques in managing arrhythmias in patients with complex congenital heart conditions.

Original Source(s)

Case Report: Catheter ablation of atrial fibrillation in a patient with cor triatriatum sinistrum: the pivotal role of intracardiac echocardiography and electroanatomic mapping

  • by Mingjie Lin, Nan Yang, Jing Kong, Jingquan Zhong, Kai Zhang

  • May 26, 2026

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