Cor Triatriatum
Synonyms
Atrium, Subdivided Left
Atriums, Subdivided Left
Cor Triatriatum Sinistrum
Heart, Triatrial
Hearts, Triatrial
Left Atrium, Subdivided
Left Atriums, Subdivided
Subdivided Left Atrium
Subdivided Left Atriums
Triatrial Heart
Triatrial Hearts
A malformation of the heart in which the embryonic common PULMONARY VEIN was not incorporated into the LEFT ATRIUM leaving behind a perforated fibromuscular membrane bisecting the left atrium, a three-atrium heart. The opening between the two left atrium sections determines the degree of obstruction to pulmonary venous return, pulmonary venous and pulmonary arterial hypertension.