DOI: https://doi.org/10.36347/sjmcr.2026.v14i03.014

Pages: 382-384

Cor triatriatum sinister is a rare congenital malformation, and its diagnosis in adulthood remains exceptional. Delayed recognition is often due to the silent evolution of non-obstructive forms, compounded in low-resource countries by limited access to advanced imaging. We report two adult female patients presenting with exertional dyspnea in whom cor triatriatum sinister associated with an atrial septal defect was diagnosed. Both underwent surgical correction. The postoperative course was uneventful, with no recurrence or complications over a 36-month follow-up. These cases illustrate the feasibility and effectiveness of surgical management for this rare anomaly in sub-Saharan Africa.