A case summary of Cor Triatriatum Sinister with unusual presence of OS- ASD (between true LA & RA)

Abstract

Cor Triatriatum Sinister is a rare congenital abnormality, usually diagnosed in childhood; few cases 
remain asymptomatic and are diagnosed in adulthood. 
Triatrial heart is a rare congenital abnormality, reported by Jeiger at the autopsy, in 0.4% of patients with 
congenital heart disease, and found in less than 0.1% of clinically diagnosed cardiopathies. Though it was 
first described by Church in 1868, as a left atrium divided by an abnormal septum, the name “cor 
triatriatum” was given by Borst in 1905. It involves usually the left atrium (cor triatriatum sinister) and