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Cor Triatriatum Sinistrum Case Report and Review of Current Concepts

A case of classic cor triatriatum sinistrum in an adolescent, correctly diagnosed preoperatively and operated on successfully is presented. Current concepts regarding this rare cardiovascular malformation are reviewed and the possibility of misdiagnosis of this lesion as rheumatic mitral valve disease is emphasized, especially in countries where rheumatic fever is still the predominant cause of valvular heart diseases.