. "C84651"^^ . "Cor TriatriatumPTNICHD" . . . "Disease or Syndrome"^^ . . "Cor TriatriatumPTNCI" . "A rare congenital abnormality of the heart characterized by the presence of three atria. The right or left atrium is divided into two parts by fibromuscular tissue or a membrane. It may be associated with other heart congenital abnormalities.NCI" . . "Cor Triatriatum"^^ . . "C0009995"^^ . "Cor Triatriatum"^^ . "NICHD"^^ .