Cor triatriatum sinistrum in an elderly man.

Divided left atrium or Cor Triatriatum, is a congenital cardiac malformation having low incidence during paediatric age, ranging between 0.1 - 0.4%. Its appearance in adulthood is even more exceptional and often inadvertently discovered, although symptomatic manifestations could entail an interesting differential diagnosis. We present an elderly patient with asymptomatic Cor Triatriatum.