Successful catheter ablation in an octogenarian with persistent atrial fibrillation complicated by cor triatriatum sinister: a case report.

Cor triatriatum sinister is a rare anomaly that accounts for 0.1% of all congenital heart diseases. Cor triatriatum sinister sometimes complicated with symptomatic AF. Detailed preoperative anatomical assessment with multiple imaging modalities helped us achieve safe and effective CA for a patient with AF and CTS, even in an octogenarian.