ANTUNES VICENTE, Miguel Bernardino et al. Cor triatriatum sinister, a classic but somewhat forgotten anomaly: Apropos of a case. []. , 12, 4, pp. 445-450.   01--2020. ISSN 2078-7170.

A heart with three atria, totaling five chambers in all, was a fact that surprised medicine more than a century ago. This rare congenital heart defect has a very low incidence, which makes it very little known to the young generations of doctors dedicated to cardiovascular diseases. The cor triatriatum sinister is usually diagnosed in early childhood, and it is considered a congenital cause of mitral stenosis. Surgical approach is the choice to release the obstacle in order to adequate blood flow through the left atrium. We present the case of a young adult with typical symptoms of mitral stenosis, without apparent key elements on the physical examination and that the echocardiogram showed this anomaly, hardly seen and published in our field in adult patients.

: Congenital heart defects; Cor triatriatum; Mitral estenosis; Left atrium.

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